Elkron AS500/RPT Livret D'instructions page 12

CONNECTING DETECTORS TO THE EXPANSION
For the connection of the inputs of various types (NC - NO - single / double balancing) refer to the
manual of the MP500 control panel.
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.
12 AS500/RPT