iWorx® TRP Series Sensor
4
502-019, Effective: October 17, 2011
© 2011 Taco Electronic Solutions, Inc.
INSTALLATION
Warning:
Electrical shock hazard. To prevent electrical shock or equipment damage, disconnect
ALL
power sources to controllers and loads before installing or servicing this equipment or modifying any wir-
ing.
Thermistors are resistive elements, and therefore, are NOT polarity sensitive. It is recommended that wir-
ing for these units not be run in the same conduit as line voltage wiring or with wiring used to supply highly
inductive loads such as motors, generators, and coils.
Mounting the Device
When mounting on a pipe, the unit should be mounted on the bottom side of the pipe to ensure proper heat transfer
and an accurate temperature reading. Heat transfer compound and proper insulation will help the overall accuracy of
the sensor.
WIRING INFORMATION
The following electrical connection can be made to the iWorx® TRP series sensors:
• Wiring to the temperature inputs of iWorX controllers
CAUTION:
Do not connect any power wiring to the sensor. Failure to observe this precaution will damage
the sensor.
Wiring
Wiring includes a connection between an iWorx® controller and an iWorx® TRP Series sensor.
Wiring requires at least 18 gauge (0.205 mm
2
), shielded twisted-pair wire.
Note:
• Wiring is polarity insensitive.
• Shielded cable is required.
• Wiring can be in the same conduit with UI, AO, and DI Wiring.
• If the cable is installed in areas of high RIF/EMI, the cable must be in conduit.
Connecting the iWorx® TRP Series Sensor
Requires 2-wire connection to the controller. To connect the thermistor outputs, attach the wires from the sensor to suit-
able terminals of the controller, as shown in Figure
1.
Figure 1: Wiring Connections.
Wiring Checkout
Verify wiring between TRP sensor and the iWorx® Controller is installed according to job wiring diagram, national and
local wiring codes.
