80
MP500/4N-8-16 Installation
5.12.4 Connecting the supplementary power supplies/repeater
To understand which the length limits of the bus and how to calculate them, read paragraph
Extending the bus with the repeater
Figure 58 - Connecting the supplementary power supplies
5.12.4.1
Connection of the detectors to the expansion module of the AS500/RPT
For the connection of the inputs of the various typologies (NC
– NO – to single/double balancing) see paragraph
IMPORTANT!
Do not join the earths of the BUS IN section with those of the BUS OUT section in order to guarantee a better
immunity to RF disturbances.
If a sensor must be powered by the local power supply, because the power from the control panel is insufficient, it is necessary to use
relay devices to maintain galvanic isolation.
The diagram below illustrates how the connection must be made.
Otherwise, an EP508 expansion module connected to the BUS OUT can be used.
Figure 59 - Diagram of how to connect a locally powered detector
DEVICES POWERED BY
THE CONTROL PANEL