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Electronic On/Off Humidity Control10-90% w/DuctMtSensor

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Manufacturer: Johnson Controls

Description: Humid.10-90% w/DuctMtSensor

Category: Environmental Controls

Sub Category: Humidity Controls

System 350TM W351 Electronic On/Off Humidity Control

The W351 Electronic Humidity Control is an On/Off

humidity control. The control output is a Single-Pole,

Double-Throw (SPDT) relay with Light-Emitting Diode

(LED) indication. It features humidification and

dehumidification modes of operation and an adjustable


The W351 control is designed to work with an

HE-67S3-0N0BT Room Sensor Humidity Transmitter

or HE-67S3-0N00P Duct Sensor Humidity Transmitter.

As with all System 350 products, the W351 control

housing is a compact NEMA 1, high-impact plastic

enclosure. The modular design provides easy,

plug-together connections for quick installation and

future expandability.

Features and Benefits

❑ Modular Design Provides the flexibility to add up to five S351
Humidity Stage Modules (nine with a 24 VAC
transformer), a D351 Humidity Display
Module, and a Y350R Power Module

❑ Plug-together Connectors
and 35 mm DIN Rail
Eliminates wiring between modules and
reduces installation costs

❑ Adjustable Setpoint Range
of 10-90% RH
Reduces inventory by covering the humidity
range required to support most humidity

❑ Wide Adjustable Differential
of 2-10% RH
Enables the user to match the equipment
cycle rate and sequencing for a given

❑ Humidification or
Dehumidification Modes of
Works in a variety of humidification or
dehumidification applications

❑ Interchangeable Humidity
Increases versatility and serviceability

Replaces Part Numbers: W351AA-2, CARW351AA-2

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