Two Wire Multi Sensor- Installation & Initial Setup

| Overview

The Multi Sensor is a sensor designed to make the 75F VAV application Title 24 Compliant. This sensor can be used to sense temperature, Humidity, CO2, and occupancy, adding IAQ and Occupancy control to your application. 

The two-wire Multi Sensor is an advanced version of the one-wire Multi Sensor. It is a part of the two-wire, Power Over RS485 (POR) platform. 

It uses a two-wire POR power and communication.   

For information on one wire interface Multi Sensor, refer to OWI Multi Sensor - Installation & Initial Set Up

| Two-Wire Multi Sensor Installation & Wiring

| Precautions

• Only use with 75F sensor applications
• Do not install in direct sunlight or above direct heat or cool sources to avoid variance
• Install according to all state and local codes.

| Mounting

It is easily mounted on a wall by self-tapping screws.

The following steps need to be used to achieve an effective installation.

• Drill a hole of diameter 25mm.
• Mount the Multi Sensor grommet using two self-tapping screws (provided in the box)
• Make sure the level lines on the grommet are parallel to the floor.

Similarly, the Multi Sensor can be mounted using a toggle bolt grommet as below:

| Detaching the Multi-Sensor

As shown below, the installed Multi Sensor can be detached from the grommets, using a Philip head Screwdriver.

| Additional Capabilities

When the top cover is removed, the Multi Sensor v2 provides the user with additional capabilities.

Address Setting Switch

• Use the Address Setting Switch to set the address for the sensor when more than one Multi Sensor v2 is installed in a bus.

Note: The Address setting switch to be set to the corresponding address number prior to powering on the sensor.

Button to Set Master to Pairing

• Press the Button to set the Master Device to Pairing Mode, without accessing the device installed at the plenum in the building (press the button somewhere between 4 to 8 seconds).

Reset Button

• Press the Reset Button to reset the sensor.

| Daisy Chaining Capability

With its daisy-chaining capability, the Multi Sensor v2 uses a two-wire adapter to connect more devices in the bus.

Up to 7 seniors can be daisy-chained in a bus using the 2-wire protocol. 

The wires can be twisted and combined to achieve the daisy chain.