www.qualitrolcorp.com
Operation
5
2.2. Primary
Power
Primary Power is connected to TB1-13 and TB1-14 with an Earth Ground connection to TB1-15.
This connection provides power to the 118 ITM. Power can be 80 to 300Vac or 40 to 280Vdc.
2.3. Sensors
The three thermocouple sensors are connected to TB4-1(+), 2(
-
); TB4-3(+), 4(
-
), and
TB4-5(+), 6(
-
). See Figure 2; Wiring Diagram.
To connect the Type K thermocouples, the YELLOW lead is connected to the positive terminal
(1, 3, or 5), and the RED lead is connected to the negative terminal (2, 4, or 6).
If no thermocouple is connected to an input, those input terminals must be shorted together.
This will prevent the ITM from reporting an alarm condition, due to a failed input, and will cause
that channel to show the internal temperature of the ITM. If the channel is not used, it can be
turned OFF using the setup software,
but the terminals still must be shorted together
.
Figure 2 – Wiring Diagram
