Wire a power source to the Connect Sensor XRT-M NEMA

An external power source can be wired to the device.

When used with batteries, the wired power source is the main power source and the batteries are the backup power source.

Note If you wire the power source in backwards you will not harm the device.

Power source requirements

• 9-30 V DC source

Equipment needed

To wire third-party sensors or a power source to the Connect Sensor XRT-M NEMA I/O interface, you need the following equipment:

• The accessory pack of two cable glands.

• A slot-headed 0.4 x 2.5 x 80 mm screwdriver
• Wire size 1.29-0.25 mm (16-30 AWG) for each pin connector

Note All external or field wiring must be in accordance with NFPA 70 Article 501.10(B).

Note Using gaskets, seals, glands or plugs other than those supplied by Digi may void certifications and regulatory approvals.

Disconnect power from the device before you begin

CAUTION! You must disconnect both batteries and external power from the Connect Sensor XRT-M NEMA before wiring sensors to the I/O interface.

WARNING! If you disconnect the batteries and reconnect them, it resets the cycle counter. The default is 7,000 cycles.

 

To wire the power source:

1. Orient the Connect Sensor XRT-M NEMA so the top of the device is facing you.

2. Open the case.

3. Disconnect any external power source from the Connect Sensor XRT-M NEMA.
4. Disconnect the batteries inside the case.
   1. The battery wires are connected to a battery port on the side of the device. Pinch the battery connector and pull it from the battery port.
   2. Repeat this step for each battery.

      

5. Remove the plug from the cable gland connectors on the side of the device.

   

6. Screw a cable gland onto the cable gland connector.
7. Twist the cable glands open.
8. Run the positive and negative wires from the power source through one of the cable glands in the device
   

9. Locate the 9-pin connector.

10. Unplug and remove the Phoenix connector from the 9-pin connector.

11. Connect the wires of the power source to the correct pins on the terminal block.
    1. Use a slot-headed 0.4x2.5x80 mm screwdriver to loosen the screws for the following pins: M GND and M PWR. The correct pins are highlighted in the graphic below.
    2. Connect the negative wire to M GND.
    3. Connect the positive wire to M PWR.
    4. Tighten the screws to 0.2 N-m to secure the wires to the connector: M GND and M PWR.

       
       

12. Plug the Phoenix connector back into the 9-pin connector.

13. Twist the cable gland closed to seal and secure the sensor cables.
14. Connect the batteries to the battery ports.

    1. Hold the battery connector for one of the batteries.

    2. Push the battery connector into the bottom battery port.

    3. Hold the battery connector for the other battery.

    4. Push the battery connector into the top battery port.

15. Close the cover on the device. The cover snaps into place.

    Note The Connect Sensor XRT-M NEMA enclosure may require some force to close. This is intended as part of the design to ensure a robust seal in damp or dusty environments. For details about closing the Connect Sensor XRT-M NEMA enclosure, see Close the Connect Sensor XRT-M NEMA case.