3-26 | Thermox Series 2000 WDG-IV / IVC / IVCM
Standard sensor connections
All WDG sensors, regardless of the sensor type, require that you make
the following connections from the control unit to the sensor (see Figure
3-27):
Control Unit Label Sensor Terminal Number
Cell + 1 (one pair)
Cell - 2
Furnace 3 (one pair)
15V COM 4
T/C + 5 (one pair)
T/C - 6
15V SPLY 12 (one pair)
15V SPLY 12
Combustibles connections
If you have a combustibles detector in your sensor, also make the fol-
lowing connections between the control unit wiring card and the sensor
board on the sensor (H
2
represents the hydrogen/carbon monoxide style
of combustibles detector. This detector can measure both CO and H
2
) -
refer to Figure 3-27:
Control Unit Label Sensor Terminal Number
H2 Act + 7 (one pair)
H2 Act - 8
H2 REF + 9 (one pair)
H2 REF - 10
Methane connections
If you have a methane detector, also make the following connections (see
Figure 3-27):
Control Unit Label Sensor Terminal Number
CH4 ACT + 13 (one pair)
CH4 ACT - 14
CH4 REF + 15 (one pair)
CH4 REF - 16