Rockwell Automation 1414-ISZxxxxx_CRZxxxxx Combination Temperature/Relative Humidity - Manual (Page 3)

Combination Temperature/Relative Humidity Transmitter 3
Publication 1414-IN017A-EN-P - October 2005
Install Combination Temperature/Relative Humidity Transmitter
The Combination Transmitter can be mounted in a duct or outside the structure.
Duct - Drill a 5/8“ (or larger) hole in the return air duct. Remove the protective
plastic sleeve from the probe and place it through the hole and secure the
enclosure to the duct with sheetmetal screws. Orientation of the enclosure and
probe has no effect on the operation of the device.
Outside Air – For best results, locate the sensor on the north side of the structure
high under an eave to prevent incorrect readings from direct sunlight and damage
due to the elements. Mount the OSA enclosure with the sensor module facing down
to prevent the accumulation of dirt or water.
Wire and Connect Combination Transmitter
Anti-static precautions should be followed to prevent damage to the device.
The transmitter should be connected to the controller using twisted pair 18 to 22
AWG wire and requires two wires for the factory-default DC 4 to 20 mA
loop-powered operation. Use shielded cable for the highest noise immunity. Do not
route signal wires in the same conduit with power cables as signal degradation may
occur. The controller Analog Input (AI) must be selected to match the transmitter
output before power is applied. The AI type must be a current input with 250 or
500 ohm impedance. Duct and O.S.A. transmitters have an operating range of –40
to 80 °C (-40 to 170 °F). The transmitter board should not be mounted where
temperatures will exceed these values. See the connection diagram for more details.
Wire Connections
Typical wiring to a controller is shown in the connection diagram.
T_Zero
T_Span
RH_Zero
RH_Span
+ 24 VDC -
ANL IN 0 +
ANL IN 0 -
Analog Current Input
ANL COM
Loop power supply
ANL IN 1+
ANL IN 1 -
Combination RH / Temp
Transmitter - Loop powered
PWR
COM
RH OUT
TEMP OUT
Power
Common
Temperature Output
RH Output