Measurement Computing WLS-TEMP - Manual (Page 12)

12
Chapter 3
Sensor Connections
The WLS-TEMP supports the following temperature sensor types:
 Thermocouple – types J, K, R, S, T, N, E, and B
 Resistance temperature detectors (RTDs) – two-, three-, or four-wire measurement modes of 100 Ω
platinum RTDs.
 Thermistors – two-, three-, or four-wire measurement modes.
 Semiconductor temperature sensors – LM35, TMP35 or equivalent
The type of sensor you select depends on your application needs. Review the temperature ranges and accuracies
of each sensor type to determine which is best suited for your application.
Screw terminal pinout
The WLS-TEMP has four banks of screw terminals. There are 26 connections on each side. Between each bank
of screw terminals are two integrated CJC sensors used for thermocouple measurements. Signals are identified
in Figure 2.
Figure 2. Screw terminal pinout
Use 16 AWG to 30 AWG wire for your signal connections.
Tighten screw terminal connections
When making connections to the screw terminals, be sure to tighten the screw until tight. Simply touching the
top of the screw terminal is not sufficient to make a proper connection.
Sensor input
You can connect up to eight temperature sensors to the differential sensor inputs ( C0H / C0L to C7H / C7L ).
Supported sensor categories include thermocouples, RTDs, thermistors, or semiconductor sensors.
Do not mix sensor categories within channel pairs. You can mix thermocouple types (J, K, R, S, T, N, E, and B)
within channel pairs, however.