Hardware and Connectivity 50
Powering up your IOLAN
The Electric Utility series of IOLAN units have a chassis ground screw. This connection must be
connected to "Equipment Ground" for DC installations or "Safety Ground" for AC installations. A
second “earth ground” connection is provided for secondary grounding. This should only be used in
conjunction with the grounding screw provided on the terminal connector.
Wiring up an HV unit
Note:
For your safety, before attempting to connect or modify any of the electrical connections to
the unit, please be sure all wiring is disconnected from any live power source. Power
should only be applied when you are sure that the wiring is correct and any safety covers
are properly installed.
Terminal # Description Usage
1 Normally Open Normally Open is a fail-safe relay connection. Use this with the
Common terminal to act as switch contacts that remain open when
the unit is powered off or in a failure state.
2 Common Common is a fail-safe relay connection. Use this terminal in
conjunction with the Normally Open or Normally Closed terminals.
3 Normally
Closed
Normally Closed is a fail-safe relay connection. Use this with the
Common terminal to act as switch contacts that remain closed
when the unit is powered off or in a failure state.
4 + / L + / L is connected to the positive (+) input for DC sources or to the
Live input for AC sources. Use with partner terminal -/N.
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