Available I/O ports

The meter is equipped with status inputs, digital outputs and relay outputs.
  • Apply appropriate Personal Protective Equipment (PPE) and follow safe electrical work practices. See NFPA 70E, CSA Z462 or other local standards.
  • Turn off all power supplying this device and the equipment in which it is installed before working on or in the equipment.
  • Always use a properly rated voltage sensing device to confirm that all power is off.
  • Assume communications and I/O wiring are hazardous live until determined otherwise.
  • Do not exceed the maximum ratings of this device.
  • Do not use this device for critical control or protection of persons, animals, property or equipment.
  • Do not use the data from the meter to confirm power is off.
  • Replace all devices, doors and covers before turning on power to this equipment.
Failure to follow these instructions will result in death or serious injury.

After you wire the meter’s I/O ports, you can configure these ports so you can use the meter to perform I/O functions.

Models Status input ports1 Digital output ports2 Relay output ports


2 (S1+, S2+) 2 (D1+, D2+)


2 (S1+, S2+) 2 (D1+, D2+)





2 (S1+, S2+) 2 (D1+, D2+) 2 (Relay 1, Relay 2)

1The meter’s status inputs require an external voltage source to detect the status input’s on/off state. The meter detects an ON state if the external voltage appearing at the status input is within its operating range. The external voltage can be derived from either the whetting output provided by the meter or by a voltage source up to 36 V DC external to the meter.

2The digital outputs can handle voltages less than 40 V DC. For higher voltage applications, use an external relay in the switching circuit.

Relay output connections



The over current protective device must be rated for the short-circuit current at the connection point.


Status input/Digital output connections


Status input wiring shown for internal voltage source.

Whetting voltage should not be used as a power source for other devices.

-/c is common for digital outputs, status inputs and whetting voltage.

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