Connecting to External Devices

External devices are connected to the appliance through the I/O terminal. The pinout for the I/O terminal is shown in the following diagram:

  1. OUT 2 (Relay Output) — Form-A dry contact outputs. When active, terminals are connected. Terminals are open when inactive.

    Maximum load is 30 V, 2 A or 200 V, 250 mA.

  2. OUT 2
  3. Ground (GND)
  4. OUT 1 (Relay Output) — Form-A dry contact outputs. When active, terminals are connected. Terminals are open when inactive.

    Maximum load is 30 V, 2 A or 200 V, 250 mA.

  5. OUT1
  6. GND
  7. IN 4 (Alarm In) — Active-Low inputs. To activate, connect the Input to the Ground pin (GND). To deactivate, leave disconnected or apply between 3 – 15 V.
  8. IN 3
  9. IN 2
  10. IN 1