EMERSON 203-5751 Wall-Mounted RH Sensor Installation Guide

: October 30, 2023
: Emerson

Table of Contents

EMERSON 203-5751 Wall-Mounted RH Sensor
Product Information
Product Specifications
Product Usage Instructions
Specifications
Mounting
Wiring
Operations
Dimensions
Installation
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

EMERSON 203-5751 Wall-Mounted RH Sensor

Product Information

Wall-mounted RH Sensor and RH/Temperature Sensor

The Emerson wall-mounted RH sensor and RH/Temperature sensor are designed for use in building control and anti-sweat control applications. The RH/Temperature sensor (P/N 203-5752 and 203-5756) measures humidity levels and temperature, while the RH sensor (P/N 203-5751) measures humidity only. The sensors provide a 0 to 5 V or 0 to 10 V output (jumper selectable), have an annual drift of 1%, and are made of ABS plastic with UL V-0 5VB Flame Class. They can operate in an environment with an operating temperature range of -40°C to 60°C and operating humidity range of 0 to 100% RH.

Product Specifications

Humidity (RH) and Temperature Sensor
- Output: 0 to 5 V or 0 to 10 V (jumper selectable)
- Impedance: 5 kΩ
- Current: 0.2 mA
Annual Drift: 1%
Temperature Option: Thermistor, 10k Ohm
Housing Material: ABS plastic with UL V-0 5VB Flame Class
Operating Environment:
- Operating Temperature: -40°C to 60°C
- Operating Humidity: 0 to 100% RH
Mounting Holes: US and European junction box
Agency Approval: CE, RoHS2 compliant, EMC Conformance: Low Voltage Directive 2014/35/EU and EMC Directive 2014/30/EU

Product Usage Instructions

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1. Mounting:
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- Mount the backplate on the wall in an appropriate location. Ensure that the “Install This End Up” label is positioned in the upper right corner.
- Wire the unit as shown in the Wiring section below.
- Attach the front plate.
Wiring:

  * Use Belden #8771 shielded three-conductor cable or equivalent.
  * Connect the RED, BLACK, and WHITE wires to the screw terminals of the sensor’s connector as shown in the image below.
  * Clip the SHIELD wire.
  * 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.
  * Connect the RED wire to the +12V power terminal on the input board.
  * 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.
3. Operations:

The 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.

Dimensions:

Refer to the product manual for dimensions.

Installation:
- Remove the cover by pressing the tab on the bottom of the sensor while pulling outward on the bottom edge of the cover.
- Position the sensor vertically on the wall, 4.5 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.
- Mount the backplate onto the wall using the screws provided.
- Wire the backplate.
- Install the cover and snap into place.

Emerson specs a wall-mounted relative humidity (RH) sensor (P/N 203-5751) and combined RH and temperature sensor (P/N 203-5752 and 203-5756) 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 P/N 203-5752| 3% (10 to 90% RH, 20 to 30°C)
Accuracy P/N 203-5756| 2% (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%
---|---
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.

Mounting

Mount the backplate on the wall in an appropriate location with the “Install This End Up” label positioned in the upper right corner.
Wire the unit as shown (see Wiring section).
Attach the front plate.

Wiring

Use Belden #8771 shielded three-conductor cable or equivalent.
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.
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.
Connect the RED wire to the +12V power terminal on the input board.
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.

Dimensions

Installation

Remove the cover by pressing the tab on the bottom of the sensor while pulling outward on the bottom edge of the cover.
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.
Mount the backplate onto the wall using the screws provided.
Wire the backplate.
Install the cover and snap into place.

Document Part # 026-4855 Rev 1

This document may be photocopied for personal use.
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