Figure 2-1. Typical Plug-In Relay And Mounting Base - Hitachi PV-250 Installation Operation & Maintenance

Figure 2-1. Typical Plug-In Relay and Mounting Base

c. The index code for each mounting base is determined by the placement of the
holes in the numbered vertical rows of the large white nylon indexing plate that is
affixed to the front of the mounting base. This indexing plate should not be
removed from the mounting base unless it is damaged or the indexing is to be
purposely changed to accommodate a relay of a different part number.
Never drill new holes in a base indexing plate that will permit
application of relays with different part numbers. Never
change indexing pins on the back of a relay, unless it is
being converted to a new part number. Otherwise, a hazard
will be created that may compromise safety circuit functions.
Copyright 2019
INDEX
PINS
WARNING
SM 4574F, Rev. 4, March 2019
PV-250 Track Relay
INDEXING
PLATE
2-2