Emerson SL-31080 user manual

Summary of the content on the page No. 1

Temp
R19
Temp
CAL
Ch3
TEMPERATURE/HUMIDITY TRANSMITTER - WALL (4-20 MA)
Description Termination
The THW420 combination The THW420 transmitter must be powered from a
temperature/humidity transmitter 24 VDC supply. The combination temperature/
is designed to meet applications humidity sensor is terminated as follows:
that require local indication of both
•The humidity transmitter requires a three-wire
temperature and humidity in a
termination for the 4-20mA output using 24 VDC.
single, aesthe

Summary of the content on the page No. 2

Mounting Enclosure Mounting Instructions Wall Mounting hardware is provided for both junction box Junction box and drywall installation. 2" x 4" 1. Pull the wires through the opening in the base plate. 2. For junction box installation: Secure the Mounting base to the box using the #6-32 x 1/2" mounting screws screws provided. For drywall installation: Drill two 3/16" holes 3-1/4" apart on center. Insert the drywall anchors and secure the base using the #6 x 1" sheet metal screws provided

Summary of the content on the page No. 3

Troubleshooting - Humidity Signal Verification 4 to 20 mA Signal You will measure the humidity output by placing an ammeter in series with the controller input. The control- ler input is connected to the terminal marked “Ch1 or Ch2” on the humidity board. 1. Verify the unit is terminated properly using Figure 2 shown below, and set your meter to the “Volts” setting. 2. Verify you have 24 VDC supplied to the unit by measuring between the “V+” and “GND” terminals at the sensor, as shown below in