Emerson Wall-Mounted RH Sensor and RH

Wall-Mounted RH Sensor and RH/Temperature Sensor
Product Information Sheet
203-5751
Overview
CPC specs a wall-mounted relative humidity (RH)
sensor (P/N 203-5751) and/or RH and temperature
sensor (P/N 203-5752) for use in building control and
anti-sweat control applications using CPC input
boards.
Specifications
General
Input Power 12VDC
Enclosure High-impact plastic, white
Relative Humidity (RH)
Sensing
Element
Digitally profiled thin-film
capacitive
RH Accuracy ±3% RH over the range 20%-90%
RH
Stability <0.5% RH per year
Operating
Humidity Range
0-100% RH
Analog Output 0-5VDC; 3-wire, observe
polarity
Scaling 0-100% RH
Temperature
Temperature
Accuracy
±0.4°F from 32°F to 140°F
Analog Out Resistive, 2-wire, no polarity
Choosing a Mounting
Location
Mount the sensor indoors in a central location within
the zone to be measured, away from doors, windows,
vents, heaters, and outside walls that could affect
temperature readings. The sensor should be at least
four feet from the floor, and no higher than necessary
to prevent tampering.
Mounting
1. Insert a screwdriver into the gap in the plastic
on the bottom side of the sensor enclosure,
and pry the front part of the enclosure away
from the rear mounting plate. Pull the front
away from the mounting plate until the top
separates from the mounting plate.
2. Remove the punch outs above the wiring
connectors so that the sensor cables can be
run into the sensor enclosure (see Figure 1).
3. Use the pre-made holes to mount the plate
on a junction box using the screws provided,
or mount it against a wall or riser.
Do not
mount the plate upside down or sideways.
The plate should be mounted with the
terminal blocks toward the bottom.
4. If necessary, drill or cut a hole in the wall to
allow the sensor cable to be run through the
wall into the sensor’s terminal block.
Figure 1 - RH/Temp Sensor Back Plate
Wall-Mounted RH Sensor and RH/Temperature Sensor
Product Information Sheet
29

Emerson Wall-Mounted RH Sensor and RH Specifications

General

Brand	Emerson
Model	Wall-Mounted RH Sensor and RH
Category	Accessories
Language	English

Summary

Overview

Mounting

Removing Enclosure

Instructions on detaching the sensor enclosure from the rear mounting plate.

Wiring Preparation

Preparing punch outs for sensor cable entry into the enclosure.

Plate Installation

Mounting the back plate using pre-made holes on a junction box or wall.

Choosing a Mounting Location

RH Sensor Wiring

Sensor Cable Connection

Connecting the RED, BLACK, and WHITE wires to the sensor's connector.

Input Board Connection

Connecting SHIELD, BLACK, and WHITE wires to the input board terminals.

Power and DIP Switch Setup

Connecting RED wire to +12V and setting the input dip switch.

RHTemp Sensor Wiring

Temperature Sensor Cable

Using Belden #8761 shielded cable for temperature sensor wiring.

Temperature Sensor Connections

Connecting BLACK and CLEAR wires to the sensor and input board.

Temperature DIP Switch

Setting the input dip switch for the temperature sensor point.

Finishing the Installation

Attaching Circuit Board Enclosure

Securing the sensor circuit board enclosure to the mounting plate.

Replacing Front Cover

Attaching the front cover by snapping it into place.

Calibration Note

Warning against exposing the sensor element to RTV silicone fumes.