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PN-150BE Biased High Efficiency Vital Relay
2.
INSTALLATION
2.1. General
Relays plug directly into a mounting base which is secured to a rack. The only
installation instructions required are for the mounting base.
2.2. Mounting Base
Secure the mounting base directly to the rack using the hardware furnished. All wiring
terminates at the rear of the mounting base to solderless terminals (receptacle contact
springs).
Mounting base details are shown in Figure 5-2 (Old Style Base) and Figure 5-3
(Improved Base) of Section 5.
2.3. RELAY INDELING
Relays are factory equipped with indexing pins to prevent insertion of an incorrect relay
into a mounting base. Each relay is accompanied by an indexing plate which is applied
to the mounting base at the time of initial installation. A typical plug-in relay with
indexing pins and base with corresponding indexing plate is shown in Figure 2-1.
INDEXING PINS
0 1 2 3
4 5 6 7
8 9
INDEX PLATE
RELAY
MOUNTING BASE
Figure 2-1. Typical Plug-In Relay and Mounting Base
Copyright 2019
SM 4551L, Rev. 0 1, March 2019
2-1
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