Emerson 203-5751 User Manual

General

Relative Humidity (RH)

Temperature

Figure 1 - RH/Temp Sensor Back Plate

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

Input Power 12VDC Enclosure High-impact plastic, white

Sensing Element RH Accuracy ±3% RH over the range 20%-90%

Stability <0.5% RH per year Operating Humidity Range Analog Output 0-5VDC; 3-wire, observe

Scaling 0-100% RH

Temperature Accuracy Analog Out Resistive, 2-wire, no polarity

Digitally profiled thin-film capacitive

0-100% RH

polarity

±0.4°F from 32°F to 140°F

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. 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.

Do not

Figure 2 – Sensor and Input Board Wiring

Wall-Mounted RH Sensor and RH/Temperature Sensor

Product Information Sheet

203-5751

RH Sensor Wiring

1. Use Belden #8771 shielded three-conductor

cable or equivalent.

NOTE: Seat the connector on the back plate if it

becomes dislodged.

2. Connect the RED, BLACK, and WHITE wires to

the screw terminals the sensor’s connector as shown in Figure 2. Clip the SHIELD wire.

3. Connect the SHIELD and BLACK wires to the

0V terminal of the input board (under INPUT

1). Connect the WHITE wire to the SIG terminal of the input board.

4. Connect the RED wire to the +12V power

terminal on the input board.

5. Locate the input dip switch for the sensor

point, and set to the OFF position (LEFT for MultiFlex, DOWN for 16AI). Refer to the input board’s user manual for locations of the input dip switches.

RH/Temp Sensor Wiring

RH wiring is the same as the RH wiring shown in the diagram(Figure 2). For temp sensor wiring, follow the steps below:

1. Use Belden #8761 shielded two-conductor

cable or equivalent.

NOTE: Seat the connector on the back plate if it

becomes dislodged.

2. Connect the BLACK and CLEAR wires to the

screw terminals the sensor’s connector as shown in Figure 2. Clip the SHIELD wire. Note that the third terminal on the sensor connector is unused.

3. Connect the SHIELD and BLACK wires to the

0V terminal of the input board (under INPUT

2). Connect the CLEAR wire to the SIG terminal of the input board.

4. Locate the input dip switch for the sensor

point, and set to the ON position (RIGHT for MultiFlex, UP for 16AI). Refer to the input board’s user manual for locations of the input dip switches.

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