Millennium Enterprises MLP-A/AR, AD-ST1400-25 user manual Wiring-Sensor Separation

Net Safety Monitoring Inc

SENSOR SEPARATION

Figure 6: Wiring—Sensor Separation

Power

Terminals*

Modbus RTU

Terminals

to PLC*

Sensor

Terminals*

Terminal Board

To designated terminal board

and oxygen sensor. See MAN-0081

RST

Multi-purpose Junction Box manual

+24V

COM

4-20

ISO

Red

Blk

Shld

Sensor Board

As the Sensor must be located in one location and the Controller in a location where it can be easily reached, it is often necessary to “separate” the Controller and Sensor.

The Sensor separation kit (SEP) is composed of a junction box and terminal strip. Refer to the Net Safety Multi-purpose Junction Box manual (MAN-0081) for terminal designation when wiring for sensor separation.

Shielded copper instrument wire (minimum 18 AWG) should be used for separations up to 500 feet. Shielded copper instrument wire (minimum

16 AWG) should be used for separations up to 2000 feet. Consult the factory if a greater separation distance is required.

Ensure that the appropriate wire is used for Class 1/Division 1 hazardous applications.

Note: If the 4-20 mA signal is not used, connect a jumper between the 4-20 terminal and the COM terminal on the Terminal Board.

MLP-A/AR/AD-ST1400-25 7