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Thermistor, Immersion
Installation and Operation
#NSA-A/CP-I-2.5-4X, NSA-A/CP-I-4-4X, NSA-A/CP-I-6-4X, NSA-HH/CP-I-2.5-PB-C, NSA-HH/CP-I-4-PB-C
NSA-HH/CP-I-6-PB-C
– 11/15/2019
Specifications subject to change without notice.
Catalog No. 11-808-785-01
Page
4
of
5
Wiring Instructions
PRECAUTION
Do not run the wiring in any conduit with line voltage (24/120/230 vac).
Open the cover of the enclosure. Carrier recommends 16 to 26 AWG twisted pair wires or shielded cable for all sensors.
Signal wiring must be run separate from low and high voltage wires (24/120/230VAC). These Carrier thermistors and RTD
temperature sensors are both non-polarity and non-position sensitive. All thermistor type units are supplied with (2) flying
lead wires, and all RTD’s are supplied with (2) or (3) flying lead wires – see Figure 6. The number of wires needed
depends on the application.
Connect thermistor/RTD wire leads to controller analog input wires using wire nuts, terminal blocks, or crimp style
connectors. All wiring must comply with all local and National Electric Codes. After wiring, attach the cover to the
enclosure.
NOTE
When using a shielded cable, be sure to connect only (1) end of the shield to ground at the controller. Connecting
both ends of the shield to ground may cause a ground loop. When removing the shield from the sensor end, make sure to
properly trim the shield to prevent any chance of shorting. Note: If the controller requires a (2) wire input for a RTD,
connect the (2) common wires (same color) together. If the controller requires (3) wires, use (3) individual wires.
Figure 6