Emerson 203-5751 User manual

Document Part # 026-4855 Rev 0 Page 1 of 6

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Emerson specs a wall-mounted relative humidity (RH) sensor

(P/N 203-5751) and combined RH and temperature sensor

(P/N 203-5752) for use in building control and anti-sweat control

applications using Emerson input boards.

Specifications

INPUT POWER

Voltage Class 2; 12 to 24 Vdc or 24 Vac

AC Voltage Tolerance ±10%

AC Frequency 50/60 Hz

OUTPUT

Voltage Output 0 to 5 V or 0 to 10 V (jumper selectable)

Voltage Min. Load Resistance 5 kΩ

Voltage Min. Sinking Current 0.2 mA

HUMIDITY

RH Element Digitally profiled thin-film capacitive, non-removable

Accuracy 3% (10 to 90% RH, 20 to 30 °C)

Temperature Effect (Outside 20° to 30°C) ≤0.1% RH per °C

Response Time (to 90% change at 20°C) 110 sec

Annual Drift ≤1%

Humidity (RH) and Temperature Sensor

Wall-mounted RH Sensor and

RH/Temperature Sensor

Installation Guide

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Document Part # 026-4855 Rev 0

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Mounting

1. Mount the backplate on the wall in an appropriate location with the “Install This End Up” label positioned in the upper

right corner.

2. Wire the unit as shown (see Wiring section).

3. Attach the front plate.

Wiring

1. Use Belden #8771 shielded three-conductor cable or equivalent.

2. Connect the RED, BLACK, and WHITE wires to the screw terminals the sensor’s connector as shown in the image below.

Clip the SHIELD wire.

3. Connect the SHIELD and BLACK wires to the 0V terminal of the input board. 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.

Output Scaling 0 to 100% RH

TEMPERATURE OPTION

Sensor Type Thermistor, 10k Ohm

OPERATING ENVIRONMENT

Operating Temperature 0 to 50 °C (32 to 122 °F)

Operating Humidity 0 to 100% RH non-condensing (Unit will recover from

saturation)

HOUSING

Material ABS plastic with UL V-0 5VB Flame Class

Mounting Holes US and European junction box

AGENCY APPROVAL

*The CE mark indicates RoHS2 compliance. Please refer to the

CE Declaration of Conformity for additional details.

EMC Conformance: Low Voltage Directive 2014/35/EU and EMC

Directive 2014/30/EU.

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Document Part # 026-4855 Rev 0

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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.

*Temperature models only

Operations

Emerson wall-mounted humidity sensors measure the levels of RH and temperature (if equipped) in the air inside a

room. To maintain accurate functionality, keep all pickup vents clear and free of dust, debris, etc.

LEGEND

RTD

RTD*

T/RTD

RTD/Temperature*

Humidity

GND

GRND (DC- or AC1 and Output Common)

PWR

POWER (DC+ or AC2)

Page 4 of 6

Document Part # 026-4855 Rev 0

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Dimensions

Installation

1. Remove the cover by pressing the tab on the bottom of the sensor while pulling outward on the bottom edge of the cover.

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2. Position the sensor vertically on the wall, 4 . feet (1.5 m) above the floor. Place so that the “Install This End Up” statement

on the board is in the upper right corner.

3. Mount the backplate onto the wall using the screws provided.

This document may be photocopied for personal use.

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The contents of this publication are presented for informational purposes only and they are not to be construed as warranties or guarantees, express or implied, regarding the products or services described herein or their use or

applicability. Emerson reserves the right to modify the designs or specifications of such products at any time without notice. Responsibility for proper selection, use and maintenance of any product remains solely with the

Document Part # 026-4855 Rev 0 Page 6 of 6

4. Wire the backplate.

5. Install the cover and snap into place.

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