Standard Range
All of Apollo's Interfaces are Isolated as Standard with the
exception of the Mains Switching Input/Output Unit which is non
isolated. They are fitted with bi-directional short-circuit
isolators so that they are unaffected by a single short circuit on
either loop input or output. However, the Input/Output Unit and
Output Unit are exceptions to this. The removal of loop power to
these interfaces will cause a 'set' relay to 'reset'.
Interfaces without Isolators are available on request.