G851

This document is a proprietary schematic diagram for the "RELAY G851" circuit, created by Digital Equipment Corporation and copyrighted in 1965. It is intended solely for test and maintenance purposes.

The schematic illustrates the wiring for five Wheelock Reed Relays (260 Series 3A, 12V DC operation), labeled K1 through K5. These relays switch connections between a set of input pins from a "MALE" connector (e.g., AD, AF, AK) and a corresponding set of output pins on an Amphenol 133-022-03 connector (e.g., RA, RB, RC).

The diagram was drawn by H.W. Porter on January 13, 1965, and checked/engineered by N. Perryman and D. Wardiman on January 25, 1965. The document is at Revision B.