urmet 1067 Bedienungsanleitung Seite 7

CONNECTING DETECTORS TO THE EXPANSION
For the connection of the inputs of various types (NC - NO - single / double balancing) refer to the manuals
of the 1067 and 1068 series control panels.
Warning: do not join the ground points of BUS IN section to the ground points of BUS OUT section, in order
to assure better immunity to RF noise.
If you need to power a detector on local power unit, because the one coming from the control panel is low,
you should use relay devices to maintain electrical isolation.
The BUS IN section is galvanically isolated from the BUS OUT section.
The built-in expansion is powered by the control panel. Consequently so are the detectors connected to it.
The following diagram illustrates how the connection is to be made.
DS1067-112A 7