Apparatus for constructing control circuits having relay circuit

Details Apparatus for constructing control circuits having relay circuit Apparatus for constructing control circuits having relay circuit

1973-09-06

1976-06-01

Hohauser, Herman J.

Electrical transmission or interconnection systems

Switching systems

3401725, 317101CE, 307203, H03K 1912

Patent

active

039612007

ABSTRACT:
Plug-in circuit modules and a prewired panel are provided for constructing fully functional relay-type control circuits according to ladder diagram conventions. Plug-in modules include input converters for interfacing external switch devices to the relay equivalent logic circuitry, output converter modules for interfacing the logic circuitry to external load devices, relay contact equivalent modules, relay coil equivalent modules, and wire equivalent modules which can be used to effect certain circuit interconnections. The panel is prewired to interconnect module plug-in positions such that insertion of modules produces continuous electrical circuits across the panel much like a ladder diagram. Contact equivalent modules can be addressed to effectively link them to selected coil equivalent modules to establish a master-slave relationship. Synchronous interrogation means are provided fo systematically comparing the status of the relay contact equivalent modules to the coil equivalent modules to which they are slaved and to generate update signals as necessary to effect a change in status, thus, to produce the functional equivalent of the electromagnetic interconnection between hard-wired nonsolid-state relay-type devices. The circuit is easily disassembled and changed in accordance with the desires of the user.

REFERENCES:
patent: 3036222 (1962-05-01), Witt
patent: 3774051 (1973-11-01), Chandler, Jr.
patent: 3890512 (1973-12-01), Kumakawa et al.

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