INSTALLATION INSTRUCTIONS

474MU TOUCHLESS SENSE SWITCH w/ MANUAL OVERRIDE BUTTON

Installation & Operation

NOTE: The SDC 474MU must be mounted to a single-gang electrical back box or plaster ring. All national and local codes must be followed in the installation of the 474MU.

• 1. It is not necessary to remove the back cover. All connections should be terminated to the provided 5-pin wire harness.
• 2. Feed the low voltage wiring through the wall to the back box.
• 3. Connect the wires to the wiring harness using twist-on wire connectors, crimp connectors, or another acceptable connector (see page 2 for typical wiring examples).
• 4. Mount the stainless steel faceplate onto the back box using the two supplied screws. Be careful not to pinch any wires when mounting the device.
• 5. Apply 12 or 24 VDC power to the device. The LED indicator ring will turn RED.
• 6. Test for proper activation by placing a hand within a few inches of the sensor. The LED sensor ring will change from RED to GREEN, and the relay will activate.
• 7. If necessary, adjust the read range of the sensor by carefully turning the blue potentiometer visible through the rear cutout of the 474U.

Rear View

Features & Applications

• Uses Active IR sensor technology; device is activated with the simple wave of a hand
• Designed to control electric locks/strikes, magnetic locks
• Latching manual button will override lock power in the event of loss of power or sensor switch failure
• Ideal for use in cleanrooms, hospitals, labs, schools, or offices
• Adjustable sensing range from 2" up to 7"
• Mounted on a durable stainless steel plate

Side View

• Dual LED, illuminated sensor indicates status
• 8-inch color coded wire harness for easy installation.

12 or 24VDC Input Voltage Current @ 45mA Active 36mA Standby 24VDC Contact Rating (1) Form C Relay, 3A@30VDC (Resistive) (Switch or Button) Standby Red LED Color Active Green Adjustable (2"-7") Read Range

Specifications

Output Activation Time 1 Second or as long as sensor is triggered Operating Temp. -4deg F ~ 131deg F (-20C ~ 55C) Weight 4 oz. (113g)

Dimensions 4.5" X 2.75" x 1.375"

Wiring Details

Power Red : +12~24VDC Black : GND Yellow : COM White : NC Output Green : NO

Read Range Adjustment

NOTE: Carefully use a small phillips head screwdriver to turn blue pot, ¼ turn at a time

Front View

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Typical Wiring Example

Using the 474U as a Request-to-Exit (REX) device in an access control system.