Modular industrial control board
An industrial control, modular technology, applied in program control, computer control, general control system, etc., can solve problems such as single function and lack of flexibility, reduce the frequency of production system adjustment, improve stability and reliability, Easy to produce effects
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specific Embodiment approach 1
[0015] Specific implementation mode one: the following combination figure 1 Describe this embodiment, the modular industrial control board described in this embodiment includes an ISA control motherboard, and the ISA control motherboard is configured with an A / D parallel input module 3, a D / A parallel output module 4, and a D / I parallel Input module 5 and D / O parallel output module 6,
[0016] The ISA control motherboard includes a mainboard CPLD1 and a bus driver module 2, and the mainboard CPLD1 is connected to the ISA bus through the bus driver module 2; A / D parallel input module 3, D / A parallel output module 4, D / I parallel input module 5 The D / O parallel output module 6 is all connected on the ISA bus through the bus driver module 2; the address signal output end of the ISA bus is connected with the address signal input end of the main board CPLD1 through the address bus; the control signal output end of the ISA bus is connected through the control The bus is connected t...
specific Embodiment approach 2
[0024] Specific implementation mode two: the following combination figure 2 Illustrate this embodiment mode, this embodiment mode is described further to embodiment one, A / D parallel input module 3 comprises analog multi-way switch 301, A / D conversion chip 302 and lower CPLD303; Analog multi-way switch 301 receives four-way analog input signal , the output end of the analog multi-way switch 301 is connected with the analog signal input end of the A / D conversion chip 302, and the digital signal output end of the A / D conversion chip 302 is connected with the digital signal input end of the lower CPLD303; the gating control of the lower CPLD303 The signal output terminal is connected with the gate control signal input terminal of the analog multiplexer 301; the conversion control command output terminal of the lower CPLD303 is connected with the conversion control command input terminal of the A / D conversion chip 302;
[0025] The data output end of the lower CPLD303 is connecte...
specific Embodiment approach 3
[0029] Specific implementation mode three: the following combination image 3 with Figure 4 Describe this embodiment mode, this embodiment mode will further explain Embodiment 1, D / A parallel output module 4 comprises signal conditioning circuit 401, D / A conversion chip 402 and reference voltage circuit 403; The reference voltage output end of reference voltage circuit 403 and The reference voltage input end of D / A conversion chip 402 is connected; The upper computer instruction input end of D / A conversion chip 402 is connected with the instruction output end of mainboard CPLD1; The analog data input end of D / A conversion chip 402 is connected with bus driver module The data output end of the ISA bus is connected;
[0030] The digital signal output terminal of the D / A conversion chip 402 is connected with the digital signal input terminal of the signal conditioning circuit 401; the signal conditioning circuit 401 outputs four analog signals.
[0031] The signal conditioning...
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