Models 375 (Including Series One), 375/1, 375/2 & 375/4 Section 5
Ludlum Measurements, Inc. Page 5-2 May 2017
External Mains (120 or 240 VAC) Alarm Relay Out (using 3 pin
connector) PN4558-038:
Allows the use of the 9-pin D female connector for RS-232 or remote use
and does not interfere with the internal form C relays.
This option includes a small enclosure connected to the Model 375 via a
short cable, that accepts a standard mains power cord (conduit option is
4558-038-1). In an ALARM condition, the mains voltage is relayed to a
set of terminals. Only a licensed electrician should install this option.
Figure 1. Mains Relay Box Back Panel.
See below for description of noted parts in drawing above.
A – connector for cable (Part # 8303-879) that connects the
mains relay box to the Model 375.
B – Use fuse that is noted in drawing above.
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