13
Part number 21729, Rev 4
Contacts and communications
ONLY Authorized, trained electricians should attempt any connection
behind the service panels!
Remote alarm contacts
The Remote Alarm provides a NO (normally open) output, a NC (normally closed) output, and a
Common. The Schematic below represents the alarm state and wire colors. The remote alarm
terminal block is located in the base area of the unit, to the left of the electronic enclosure.
Note:
1)
The Remote Alarm contacts will have a 30 minute delay before they are tripped.
2)
Always double check the continuity of the NO and NC contacts.
3)
This procedure is for the Alarm only.
24 V
DC
(User supplied)
R= 250 Ω
A 4-20mA signal is available. Connect the circuit to positions 1 and 2 as shown above. Monitor
the DC voltage across a 250 Ω resistor. Remove the galvaneal access cover on the rear of the
ULT to gain access to a Type T thermocouple that can be used to monitor the chamber
temperature. Connect the thermocouple to a temperature reading device to view the chamber
temperature. The dc voltage drop across the resistor corresponds to the chamber temperature
(deg C) and should match the temperature on the display.
Summary of Contents for GM-ULT-1786
Page 22: ...Part number 21729 Rev 4...
