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 in the USA, CSA Z462 or applicable local standards.
  • Turn off all power supplying this device and the equipment in which it is installed before working on the device or equipment.
  • Always use a properly rated voltage sensing device to confirm that all power is off.
  • Treat communications and I/O wiring connected to multiple devices as hazardous live until determined otherwise.
  • Do not exceed the device’s ratings for maximum limits.
  • Do not use this device for critical control or protection applications where human or equipment safety relies on the operation of the control circuit.
  • 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.

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