Security system, control device, and control method

Abstract

The present invention provides a security system, a control device, and a control method that can prevent the value of the current required to control multiple terminal devices in a security system from exceeding an upper limit. [Solution] The security system comprises a plurality of terminal devices and a control device. At least one of the plurality of terminal devices is a specific terminal device that performs the operation during a first operating period in which a current having a first current value flows, and a second operating period in which a current having a second current value smaller than the first current value flows. The control device transmits a control signal to the specific terminal device, waits to transmit the control signal to the plurality of terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends, and after the waiting period ends, transmits the control signal to at least one of the plurality of terminal devices.

Description

Technical Field

[0001] The present invention relates to a security system, a control device, and a control method.

Background Art

[0002] In a security system such as an entrance and exit management system, an access control panel controls the state of an electric lock provided on a door (see, for example, Patent Document 1). The access control panel and the electric lock are connected by a signal line. The access control panel transmits a control signal for controlling the state of the electric lock to the electric lock via the signal line. Further, the access control panel transmits power for driving the electric lock to the electric lock via the signal line.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] It is required to control the states of a plurality of electric locks collectively. There is an upper limit to the value of the current that the access control panel can supply to a plurality of electric locks simultaneously. When an electric lock whose consumption current instantaneously increases at the start of control is used, if the control periods of a plurality of electric locks overlap, the value of the current required for controlling those electric locks instantaneously exceeds the current supply capacity of the access control panel, and there is a possibility that the access control panel cannot correctly control the plurality of electric locks.

[0005] An object of the present invention is to provide a security system, a control device, and a control method that can suppress the maximum value of the current required for controlling a plurality of terminal devices in a security system.

Means for Solving the Problems

[0006] The present invention relates to a security system comprising: a plurality of terminal devices that are controlled based on a control signal from a control device and perform security-related operations using power supplied from the control device; and a control device that is connected to the plurality of terminal devices, transmits the control signal to the plurality of terminal devices, and supplies power to the plurality of terminal devices, wherein at least one of the plurality of terminal devices is a specific terminal device that performs the operations during a first operating period in which a current having a first current value flows and a second operating period in which a current having a second current value smaller than the first current value flows, and the control device transmits the control signal to the specific terminal device, waits for the transmission of the control signal to the plurality of terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends, and after the waiting period ends, transmits the control signal to at least one of the plurality of terminal devices.

[0007] The present invention relates to a security system comprising: a plurality of terminal devices that are controlled based on a control signal from a control device and perform security-related operations using power supplied from the control device; and a control device that is connected to the plurality of terminal devices, transmits the control signal to the plurality of terminal devices, and supplies power to the plurality of terminal devices, wherein at least one of the plurality of terminal devices is a specific terminal device that performs the operations during a first operating period in which a current having a first current value flows and a second operating period in which a current having a second current value smaller than the first current value flows, and the control device transmits the control signal to the specific terminal device, waits for the transmission of the control signal to the plurality of terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends, and after the waiting period ends, transmits the control signal to at least one of the plurality of terminal devices.

[0008] The present invention relates to a control method for controlling a plurality of terminal devices in a security system comprising: a plurality of terminal devices that are controlled based on a control signal from a control device and perform security-related operations using power supplied from the control device; and a control device that is connected to the plurality of terminal devices, transmits the control signal to the plurality of terminal devices, and supplies power to the plurality of terminal devices, wherein at least one of the plurality of terminal devices is a specific terminal device that performs the operations during a first operating period in which a current having a first current value flows and a second operating period in which a current having a second current value smaller than the first current value flows, and the control method is characterized by comprising the steps of: the control device transmitting the control signal to the specific terminal device; the control device waiting to transmit the control signal to the plurality of terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends; and after the waiting period ends, the control device transmitting the control signal to at least one of the plurality of terminal devices. [Effects of the Invention]

[0009] According to the present invention, the maximum value of the current required to control multiple terminal devices in a security system can be reduced, and a security system can be constructed using a power supply with a smaller rated current. Furthermore, with the same rated current power supply, it becomes possible to control more terminal devices simultaneously. [Brief explanation of the drawing]

[0010] [Figure 1] This diagram shows an example of the configuration of a security system according to an embodiment of the present invention. [Figure 2] This block diagram shows an example of the configuration of an access control panel according to an embodiment of the present invention. [Figure 3] This is a timing chart showing an example of the waveform of the current flowing through the electric lock in an embodiment of the present invention. [Figure 4] This figure shows an example of electric lock information in an embodiment of the present invention. [Figure 5]This is a flowchart showing a method for controlling an electric lock in an embodiment of the present invention. [Figure 6] This is a timing chart showing the waveforms of the control signal transmitted to the electric lock in an embodiment of the present invention and the current supplied by the access control panel. [Modes for carrying out the invention]

[0011] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 shows an example of the configuration of the security system 1 according to this embodiment. The security system 1 shown in Figure 1 comprises an access control panel 10, electric locks 11a to 11h, card authentication devices 12a to 12h, and a higher-level device 13.

[0012] The access control panel 10 is a control device that controls the status of electric locks 11a to 11h. The access control panel 10 transmits control signals from electric locks 11a to 11h to control the operation of electric locks 11a to 11h. The access control panel 10 also supplies the electric locks 11a to 11h with the power necessary for their operation.

[0013] The electric locks 11a to 11h are connected to the access control panel 10. In Figure 1, each of the electric locks 11a to 11h is connected to the access control panel 10 by a single signal line, but in reality, each of the electric locks 11a to 11h is connected to the access control panel 10 by multiple signal lines, including, for example, a control signal line for transmitting control signals and a power line for transmitting power. The electric locks 11a to 11h are terminal devices that receive control signals transmitted from the access control panel 10 and perform security-related operations, namely opening and closing operations, using power supplied from the access control panel 10. The opening and closing operations are locking operations or unlocking operations. Eight electric locks are connected to the access control panel 10, but the number of electric locks connected to one access control panel is not limited to eight.

[0014] The objects controlled by the access control panel 10 are not limited to electric locks. The access control panel 10 may also control the opening and closing operations of automatic doors or security gates.

[0015] Card authentication devices 12a to 12h are card readers that read personal information recorded on a magnetic card or a contactless IC card. Card authentication devices 12a to 12h are provided corresponding to electric locks 11a to 11h. Card authentication devices 12a to 12h are connected to the access control panel 10.

[0016] For example, when a user causes a magnetic card with personal information recorded thereon to be read by the card authentication device 12a, the card authentication device 12a collates the personal information read from the magnetic card with the pre-registered personal information and performs authentication. When the authentication is successful, the card authentication device 12a transmits a signal to the access control panel 10, and the access control panel 10 causes the electric lock 11a to perform an opening / closing operation.

[0017] At least one of the card authentication devices 12a to 12h may be replaced with a biometric authentication device that performs biometric authentication such as fingerprint authentication or face authentication. Although eight card authentication devices are connected to the access control panel 10, the number of card authentication devices connected to one access control panel is not limited to eight.

[0018] The upper device 13 is a device such as a personal computer (PC). The access control panel 10 is connected to the upper device 13 via a network such as a local area network (LAN). When it is necessary to collectively control the electric locks 11a to 11h, the upper device 13 transmits a control command to the access control panel 10. For example, at a preset time or at the timing when the administrator of the security system 1 inputs an instruction to perform collective control of the electric locks 11a to 11h to the upper device 13, the upper device 13 transmits a control command to the access control panel 10. In an emergency such as a fire, the upper device 13 may transmit a control command to the access control panel 10. The access control panel 10 receives the control command transmitted by the upper device 13 and causes the electric locks 11a to 11h to perform an opening / closing operation.

[0019] Figure 2 shows an example of the configuration of the access control panel 10. The access control panel 10 includes a network communication unit 100, an electric lock communication unit 101, an authentication device communication unit 102, a storage unit 103, a power supply unit 104, and a control unit 105.

[0020] The network communication unit 100 communicates with the upper-level device 13 via a network. The electric lock communication unit 101 communicates with the electric locks 11a to 11h. The authentication device communication unit 102 communicates with the card authentication devices 12a to 12h.

[0021] The storage unit 103 is a memory such as an SRAM (Static Random Access Memory), a SDRAM (Synchronous Dynamic Random Access Memory), or a flash memory. The storage unit 103 stores the electric lock information described later.

[0022] The power supply unit 104 includes an AC / DC converter, converts the AC voltage supplied from an external power supply into a DC voltage, and outputs the DC voltage to the electric locks 11a to 11h. Thereby, the power supply unit 104 supplies the electric locks 11a to 11h with the power necessary for the operation of the electric locks 11a to 11h. The power supply unit 104 may supply the power supplied from a battery to the electric locks 11a to 11h.

[0023] The control unit 105 is a processor such as a CPU (Central Processing Unit) or a microprocessor. The control unit 105 controls the communication with the electric locks 11a to 11h, the communication with the card authentication devices 12a to 12h, and the communication with the upper-level device 13, and causes the electric locks 11a to 11h to perform opening and closing operations.

[0024] Figure 3 shows an example of the waveform of the current flowing through the electric locks that can be used as the electric locks 11a to 11h.

[0025] Figure 3(a) shows an example of the current waveform flowing through an electric lock that locks when energized or unlocks when energized. Hereafter, this electric lock will be referred to as a normal lock. When control of the normal lock is started, a current of 300 milliamperes (mA) flows through the normal lock. During the locking operation, the state of the normal lock changes from the unlocked state to the locked state, and the locked state is maintained while a constant current of 300 mA flows. During the unlocking operation, the state of the normal lock changes from the locked state to the unlocked state, and the unlocked state is maintained while a constant current of 300 mA flows.

[0026] Figure 3(b) shows an example of the waveform of the current flowing through the motor lock. The motor lock is equipped with a motor, and the lock is opened and closed by the operation of the motor. When control of the motor lock is started, a pulse current of 1500mA (first current value) flows through the motor lock for a period of 50 milliseconds (ms) (first operating period). After that, a current of 300mA (second current value) flows through the motor lock until the end of a 2-second control period (second operating period). In the locking operation, the state of the motor lock changes from the unlocked state to the locked state, and the locked state is maintained even after the control period ends. In the unlocking operation, the state of the motor lock changes from the locked state to the unlocked state, and the unlocked state is maintained even after the control period ends.

[0027] Figure 3(c) shows an example of the waveform of the current flowing through an electromagnet lock (electromagnetic electric lock). The electromagnet lock keeps the door locked using an electromagnet. When no DC voltage is applied to the electromagnet lock, the electromagnet lock is not controlled, and the state of the electromagnet lock is unlocked. When control of the electromagnet lock is started, a pulsed current of 2100mA (first current value) flows through the electromagnet lock for a period of 10ms (first operating period). After that, a constant current of 200mA (second current value) flows through the electromagnet lock until an arbitrary control period (second operating period) ends. The locked state is maintained while a constant current of 200mA is flowing.

[0028] Motorized locks and electromagnet locks are specific types of electric locks that perform opening and closing operations during a first and second operating period. As described above, in motorized locks and electromagnet locks, a pulsed current flows during the first operating period. When the first operating periods of multiple motorized locks or electromagnet locks overlap, the access control panel 10 needs to supply a very large current. Therefore, the value of the current supplied by the access control panel 10 may exceed the current supply capacity of the access control panel 10.

[0029] In this embodiment, the access control panel 10 waits without starting control of the next electric lock from the moment control of the motor lock or electromagnet lock is started until a preset waiting period has elapsed. The length of the waiting period is longer than the first operating period during which pulse current flows. Since the first operating periods of multiple motor locks or electromagnet locks do not overlap, the value of the current supplied by the access control panel 10 does not exceed the current supply capacity of the access control panel 10.

[0030] The length of the standby period is shorter than the total length of the period required to control the motor lock or electromagnet lock (the first operating period and the second operating period). Therefore, the access control panel 10 does not need to wait for the entire period required to control the motor lock or electromagnet lock, but only needs to wait momentarily. As a result, the time required to control multiple electric locks as a whole can be shortened compared to the case where the access control panel 10 waits until the entire control of the motor lock or electromagnet lock is completed.

[0031] Figure 4 shows an example of electric lock information stored in the storage unit 103 of the access control panel 10. The electric lock information includes the address, type, and standby period length of each electric lock.

[0032] The address is assigned to each electric lock to identify it, and is unique information (identification information, i.e., ID) for each electric lock. The type of electric lock (terminal information) indicates whether it is a standard lock, a motor lock, or an electromagnet lock. For example, electric locks 11a, 11b, 11e, and 11g are standard locks, electric locks 11c, 11d, and 11f are motor locks, and electric lock 11h is an electromagnet lock. Standard locks do not have a standby period, while the standby period for motor locks and electromagnet locks is 100ms.

[0033] Figure 5 shows the control method for the electric lock. The operation of the access control panel 10 will be explained with reference to Figure 5.

[0034] (Step S100) The higher-level device 13 transmits a control command to the access control panel 10 for the collective control of electric locks 11a through 11h. The network communication unit 100 of the access control panel 10 receives the control command and outputs it to the control unit 105.

[0035] (Step S105) The control unit 105 reads the electric lock information from the storage unit 103.

[0036] (Step S110) The control unit 105 selects the electric lock to be controlled from the eight electric locks registered in the electric lock information. For example, if the electric locks are controlled in ascending order of address, the control unit 105 selects the electric lock with the smallest address among the electric locks that have not yet been controlled.

[0037] (Step S115) The control unit 105 determines whether or not the standby period has started. If the standby period has started, step S120, described later, is executed. If the standby period has not started, step S125, described later, is executed.

[0038] (Step S120) If a standby period has started, the control unit 105 waits until the standby period ends. The control unit 105 does not send a control signal to the controlled electric lock until the standby period ends. When the standby period ends, the next step S125 is executed.

[0039] (Step S125) After the standby period has ended, or if the standby period has not yet started, the control unit 105 outputs a control signal to the electric lock communication unit 101. The electric lock communication unit 101 transmits the control signal to the electric lock to be controlled.

[0040] (Step S130) After the control signal is transmitted, the control unit 105 refers to the type of electric lock to be controlled in the electric lock information and determines whether the electric lock to be controlled is a specific electric lock (motor lock or electromagnet lock). If the electric lock to be controlled is a specific electric lock, step S135, described later, is executed. If the electric lock to be controlled is not a specific electric lock, step S140, described later, is executed.

[0041] (Step S135) If the controlled electric lock is a specific electric lock, a waiting period is initiated. At this time, a waiting period with a length specified in the electric lock information is set.

[0042] The electric lock information stored in the memory unit 103 may include the length of the period during which pulse current flows through each electric lock (first operating period) instead of the standby period length. The control unit 105 may calculate the standby period length based on the length of the first operating period. The electric lock information may include both the standby period length and the length of the first operating period.

[0043] (Step S140) After the waiting period begins, or if the electric lock to be controlled is not a specific electric lock, the control unit 105 determines whether to terminate control of electric locks 11a to 11h. If all of electric locks 11a to 11h are selected as electric locks to be controlled and their control is terminated, the access control panel 10 terminates control of electric locks 11a to 11h. If at least one of electric locks 11a to 11h has not yet been selected as an electric lock to be controlled, or if the control of at least one of the electric locks selected as an electric lock to be controlled has not been terminated, step S110 is performed.

[0044] Figure 6 shows the waveforms of the control signals transmitted from electric locks 11a to 11h and the current supplied by the access control panel 10. Referring to Figure 6, the changes in the current supplied by the access control panel 10 will be explained. In the following explanation, the types of electric locks 11a to 11h correspond to the types in the electric lock information shown in Figure 4.

[0045] The access control panel 10 transmits a control signal to the electric lock 11a at timing T1. The electric lock 11a is a standard lock. Control of the electric lock 11a is initiated at timing T1, and the current value increases to 300mA. When the electric lock 11a is controlled, no standby period is set.

[0046] The access control panel 10 transmits a control signal to the electric lock 11b at timing T2. The electric lock 11b is a standard lock. Control of the electric lock 11b starts at timing T2, while control of the electric lock 11a continues. The current value increases from 300mA to 600mA. When the electric lock 11b is controlled, no standby period is set.

[0047] The access control panel 10 transmits a control signal to the electric lock 11c at timing T3. The electric lock 11c is a motor lock. Control of the electric lock 11c starts at timing T3, while control of electric locks 11a and 11b continues. A pulse current of 1500mA flows, increasing the current value from 600mA to 2100mA, and then decreasing to 900mA. A 100ms standby period begins at timing T3.

[0048] The standby period ends at timing T4, 100ms after timing T3. At timing T4, the access control panel 10 transmits a control signal to the electric lock 11d. The electric lock 11d is a motor lock. Control of the electric lock 11d starts at timing T4, and control of electric locks 11a to 11c continues. A pulse current of 1500mA flows, increasing the current value from 900mA to 2400mA, and then decreasing to 1200mA. At timing T4, a 100ms standby period begins.

[0049] The standby period ends at timing T5, 100ms after timing T4. At timing T5, the access control panel 10 sends a control signal to the electric lock 11e. The electric lock 11e is a standard lock. Control of the electric lock 11e starts at timing T5, and control of electric locks 11a to 11d continues. The current value increases from 1200mA to 1500mA. When control of the electric lock 11e is performed, no standby period is set.

[0050] The access control panel 10 transmits a control signal to the electric lock 11f at timing T6. The electric lock 11f is a motor lock. Control of the electric lock 11f starts at timing T6, and control of electric locks 11a through 11e continues. A pulse current of 1500mA flows, increasing the current value from 1500mA to 3000mA, and then decreasing to 1800mA. A 100ms waiting period begins at timing T6.

[0051] The standby period ends at timing T7, 100ms after timing T6. At timing T7, the access control panel 10 sends a control signal to the electric lock 11g. The electric lock 11g is a standard lock. Control of the electric lock 11g starts at timing T7, and control of electric locks 11a to 11f continues. The current value increases from 1800mA to 2100mA. When the electric lock 11g is controlled, no standby period is set.

[0052] The access control panel 10 transmits a control signal to the electric lock 11h at timing T8. The electric lock 11h is an electromagnet lock. Control of the electric lock 11h starts at timing T8, and control of electric locks 11a to 11g continues. A pulse current of 2100mA flows, increasing the current value from 2100mA to 4200mA, and then decreasing to 2300mA. A 100ms waiting period begins at timing T8.

[0053] In the example above, the maximum current supplied by the access control panel 10 is 4200mA. For example, if the upper limit of the current that the access control panel 10 can supply is 4300mA, when control of electric locks 11a to 11h is started simultaneously, a pulse current of 1500mA will flow through electric locks 11c, 11d, and 11f, and a pulse current of 2100mA will flow through electric lock 11h. Therefore, within 50ms after control of electric locks 11a to 11h is started, the access control panel 10 must supply a current of 6600mA, which exceeds the upper limit. In contrast, in the example above, the maximum current supplied by the access control panel 10 is less than the upper limit.

[0054] As described above, the electric locks 11a to 11h (terminal devices) are controlled based on control signals from the access control panel 10 (control device), and perform security-related operations using power supplied from the access control panel 10. The access control panel 10 is connected to the electric locks 11a to 11h, transmits control signals to the electric locks 11a to 11h, and supplies power to the electric locks 11a to 11h. At least one of the electric locks 11a to 11h is a specific terminal device that performs security-related operations during a first operating period in which a current with a first current value flows, and a second operating period in which a current with a second current value smaller than the first current value flows. The access control panel 10 transmits control signals to the specific terminal device and waits to transmit control signals to the electric locks 11a to 11h until a waiting period longer than the length of the first operating period ends from the time the control signals were transmitted to the specific terminal device. After the waiting period ends, the access control panel 10 transmits control signals to at least one of the electric locks 11a to 11h.

[0055] If the standby period control described above is not performed, the maximum current supply of the access control panel 10 must not exceed the sum of the first current values. By controlling the standby period as described above, the access control panel 10 can supply power to the electric locks 11a to 11h (terminal devices) as long as the maximum current supply of the access control panel 10 does not exceed the sum of the second current values ​​of the connected electric locks 11a to 11h (terminal devices) and the maximum current value among the first current values ​​of the connected electric locks 11a to 11h (terminal devices), making it possible to increase the number of electric locks (terminal devices) that can be connected to the access control panel 10.

[0056] In some cases, electric locks may be used that have different current values ​​and / or operating periods for transitioning from a locked state to an unlocked state, and different current values ​​and / or operating periods for transitioning from an unlocked state to a locked state. Furthermore, the current values ​​required to maintain the locked state of an electric lock may also differ from the current values ​​required to maintain the unlocked state.

[0057] In such cases as well, the above embodiment is applicable. When both the current value for maintaining the locked state of the electric lock and the current value for maintaining the unlocked state of the electric lock are smaller than both the current value for transitioning the electric lock from a locked state to an unlocked state and the current value for transitioning the electric lock from an unlocked state to a locked state, the first current value is a concept that includes the current value for transitioning the electric lock from a locked state to an unlocked state and the current value for transitioning it from an unlocked state to a locked state, the first operating period is a concept that includes the operating period for transitioning the electric lock from a locked state to an unlocked state and the operating period for transitioning it from an unlocked state to a locked state, the second current value is a concept that includes the current value for maintaining the locked state of the electric lock and the current value for maintaining the unlocked state of the electric lock, and the second operating period is a concept that includes the time while the electric lock is maintained in a locked state and the time while the electric lock is maintained in an unlocked state.

[0058] The access control panel 10 stores identification information for identifying each of the electric locks 11a to 11h, and terminal information indicating whether each of the electric locks 11a to 11h is a specific terminal device, in association with each other.

[0059] The terminal information indicates the type of electric lock 11a to 11h. The access control panel 10 stores at least one of the length of the first operating period and the length of the standby period for each type.

[0060] The specified terminal device is either a motor lock that opens and closes the lock by the operation of a motor, or an electromagnet lock that opens and closes the door by the attraction of an electromagnet.

[0061] Control of the next terminal device will not begin until the standby period ends, starting from the moment control of a specific terminal device begins. Therefore, it is possible to avoid exceeding the upper limit for the current required to control multiple terminal devices in the security system.

[0062] While embodiments of the present invention have been described in detail above with reference to the drawings, the specific configuration is not limited to the embodiments described above, and may include design changes and the like that do not depart from the spirit of the present invention. [Explanation of symbols]

[0063] 1 Security system, 10 Access control panel, 11a, 11b, 11c, 11d, 11e, 11f, 11g, 11h Electric lock, 12a, 12b, 12c, 12d, 12e, 12f, 12g, 12h Card authentication device, 13 Higher-level device, 100 Network communication unit, 101 Electric lock communication unit, 102 Authentication device communication unit, 103 Storage unit, 104 Power supply unit, 105 Control unit

Claims

1. Multiple terminal devices that are controlled based on control signals from a control device and perform security-related operations using power supplied from the control device, The control device connects to the plurality of terminal devices, transmits the control signals to the plurality of terminal devices, and supplies power to the plurality of terminal devices. A security system equipped with, At least one of the plurality of terminal devices is a specific terminal device that performs the operation during a first operating period in which a current having a first current value flows, and a second operating period in which a current having a second current value smaller than the first current value flows. The control device is The control signal is transmitted to the specified terminal device. The system waits to transmit the control signal to the multiple terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends. After the waiting period ends, the control signal is transmitted to at least one of the multiple terminal devices. A security system characterized by the following features.

2. The control device is Identification information for identifying each of the multiple terminal devices and terminal information indicating whether each of the multiple terminal devices is the specified terminal device are stored in association with each other. The security system according to feature 1.

3. The terminal information indicates the type of each of the multiple terminal devices, The control device stores at least one of the length of the first operating period and the length of the standby period for each type. The security system according to feature 2.

4. The aforementioned specific terminal device is a motor lock that opens and closes the lock by the operation of a motor, or an electromagnet lock that opens and closes the door by the attraction of an electromagnet. A security system according to any one of claims 1 to 3.

5. Multiple terminal devices that are controlled based on control signals from a control device and perform security-related operations using power supplied from the control device, The control device connects to the plurality of terminal devices, transmits the control signals to the plurality of terminal devices, and supplies power to the plurality of terminal devices. The control device in a security system comprising: At least one of the plurality of terminal devices is a specific terminal device that performs the operation during a first operating period in which a current having a first current value flows, and a second operating period in which a current having a second current value smaller than the first current value flows. The control device is The control signal is transmitted to the specified terminal device. The system waits to transmit the control signal to the multiple terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends. After the waiting period ends, the control signal is transmitted to at least one of the multiple terminal devices. A control device characterized by the following features.

6. Multiple terminal devices that are controlled based on control signals from a control device and perform security-related operations using power supplied from the control device, The control device connects to the plurality of terminal devices, transmits the control signals to the plurality of terminal devices, and supplies power to the plurality of terminal devices. A control method for controlling the plurality of terminal devices in a security system comprising the above, At least one of the plurality of terminal devices is a specific terminal device that performs the operation during a first operating period in which a current having a first current value flows, and a second operating period in which a current having a second current value smaller than the first current value flows. The control method described above is The steps include: the control device transmitting the control signal to the specific terminal device; The control device waits to transmit the control signal to the plurality of terminal devices from the time the control signal is transmitted to the specific terminal device until a waiting period longer than the length of the first operating period ends. After the waiting period ends, the control device transmits the control signal to at least one of the plurality of terminal devices. A control method characterized by comprising:

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