PLC (Programmable logic Controller) open relay inserting case

Abstract

The technical application of the invention relates to a relay cabinet of a PLC open module, and a PLC open relay inserting case can reduce the wiring working strength and rapidly finish the connection between a relay and the PLC open module. The PLC open relay cabinet is provided with a relay interface, a plurality of printed wiring board relay sockets which are in matrix arrangement are arranged on a wiring board fixed at the bottom of the inserting case, and a relay external terminal strip, a cable inserting socket and a power supply external terminal strip are arranged at the back of the inserting case, wherein the cable inserting socket is used for inserting and connecting each open point of the PLC open module. The technical scheme also creates a condition for adding a protection control functions, such as online control, sequence control enabled control and false action prevention.

Description

technical field [0001] The invention relates to a relay box for a PLC output module. Background technique [0002] Taking the power distribution cabinet as an example, the wiring of the programmable controller PLC output module and the corresponding relay, the relay contact and the corresponding terminal is an extremely cumbersome work, mainly including the wiring of the PLC output module and the excitation of the relay. Coil wiring and relay contact wiring. There are two main wiring methods at present: one is to set up a wiring connector, one end of the wiring connector is connected to the PLC output module, and the other end can only be connected to the relay excitation coil terminal through manual wiring operation. For example, UNITY140 series modules and Siemens S7 modules all adopt this method; the second method is to use a cable plug on the wiring side of the PLC output module, and the cable plug terminal needs to be manually wired and connected to the relay excitatio...

AI Technical Summary

Problems solved by technology

Among the above-mentioned various connection wirings, the wiring between the PLC output module and the relay excitation coil needs to be manually operated.

At present, many PLCs have many output points. Corresponding to these output points are a considerable number of relays. These relays use relay sockets for wiring before the board or relay sockets for soldering wires behind the board. Such a structure occupies a considerable cabinet Space, how to arrange such a space in a power distribution cabinet with relatively tight space is a very difficult problem, and another main problem is that the existing relay connection structure does not have the ability to implement function setting and manipulation control for many relays

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