Ametek Thermox WDG-V, User Manual

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Installation Guide | 3-27
Remote cal
switch normally
open (dry
contact closure)
All common wires
to pin 16 on RCU
and valve commons
on control unit
Overall braided shield
or rigid metal conduit
CIN
VALVE COM A SPAN 3 SPAN 4 Z SPAN 1 VALVE COM SPAN 2
Figure 3-21. RCU connections.
Digital Input to Initiate Remote Calibration Unit
The digital input connections on the wiring card allow you to initiate a re-
mote calibration from a remote location. For this option to work, you must
have a remote calibration unit. The system monitors the digital input, and
when the switch closes, it sends the system into an automatic calibration.
The switch you connect to this digital input must be a normally open
switch.
Digital input connections are labeled as follows on the wiring card: CIN