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Small-sized multichannel output safety relay

A technology of safety relays and relays, applied in relays, circuits, electrical components, etc., can solve problems such as inconvenient installation, high cost, and large size, and achieve the effect of increasing the number of output channels, ensuring reliability, and meeting functional safety requirements

Active Publication Date: 2015-06-10
CHINA AEROSPACE TIMES ELECTRONICS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to meet the multi-channel output of the existing safety relay, the internal relay adopts a large-volume multi-contact forced-guided relay, which makes the product bulky, high in cost, and inconvenient to install

Method used

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  • Small-sized multichannel output safety relay
  • Small-sized multichannel output safety relay
  • Small-sized multichannel output safety relay

Examples

Experimental program
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Embodiment Construction

[0033] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0034] Such as figure 1 Shown is a block diagram of the circuit structure of the safety relay of the present invention. The safety relay module of the present invention includes a power supply module, a main control module, an expansion module and an output module. The power supply module is powered by an external power supply, and outputs a high-level signal U+ and a low-level signal U-. The power supply module has the functions of over-current protection, over-voltage protection and output short-circuit protection.

[0035] The main control module controls the opening and closing of the forced-guiding relays K1 and K2 by a dual-channel circuit. Each channel consists of a transient circuit and a steady state circuit. The first channel includes K1 transient state and K1 steady state. The K1 transient state is composed of the start / reset switc...

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PUM

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Abstract

The invention relates to a small-sized multichannel output safety relay, which consists of a power module, a master control module, an extension module and an output module. The small-sized multichannel output safety relay is mainly used for realizing safe and reliable shutoff of the safe input of a power supply or a machine. Through mechanical interlocking characteristics of respective normally open (NO) contacts and normally closed (NC) contacts of internal forced guide relays, a two-channel structural circuit is designed. When the safe input of the power supply or the machine is turned off, tandem redundancy NO contact channels are reliably disconnected through an internal sequential circuit with a master / slave mode. During a starting process, when a critical fault can be detected by adopting the sequential circuit with the master / slave mode, the sequential circuit cannot be started under a fault mode. According to the safety relay, on the premise that the reliability and the safety level are ensured, the number of output channels is increased, the cost of the internal forced guide relays is reduced, the size of the whole safety relay is reduced, and installation and use of a user is facilitated.

Description

technical field [0001] The invention relates to a safety relay used in the field of mechanical safety, in particular to a small-volume multi-channel output safety relay, which is suitable for realizing safety shutdown and confirmation of power supply or mechanical safety input. Background technique [0002] Relay contacts work under high current conditions for a long time, and contact bonding is prone to occur, resulting in the inability to reliably cut off the load, thereby causing danger. The safety relay is composed of several force-guided relays and logic circuits. It has output contact series redundancy and contact bonding self-test function. The device confirms the disconnection input and reliably disconnects the load (because the output channel is composed of different internal force-guided relay contacts in series redundancy), and then detects and judges the fault. Before the fault is eliminated, the safety relay is always in the forced disconnection state , to ensu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H47/02
Inventor 云建军刘进唐侃
Owner CHINA AEROSPACE TIMES ELECTRONICS CORP
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