CIE-A-200 Control Panel Engineering and Commissioning Manual
17
Peripheral Bus (PB_1 & PB_2)
Communications between the panel and repeater is via a multi-drop RS-485 Peripheral Bus.
2-core 1.5mm
2
screened fire resistant cable (i.e. FP200, Firetuff, Firecell) cable should be used for
communications to the repeater.
The maximum total
cable length from the control panel to a repeater is 500 metres
.
Up to 8 repeaters can be used but they must all be within the maximum 500 metres cable length and are
wired + to +, - to -, the screen must be connected to the control panel at one end only using the terminals
provided. Terminate the unused end in a connector block as shown below
and so on up to the maximum of
8 repeaters.
The peripheral bus must be run from the panel to the first repeater then the second repeater and so on; the
peripheral bus must not be spurred from one point.
The jumpers are fitted to impedance match the cable with the driver ICs & prevent signal reflections down
the cable. The jumpers
must
be changed on the
CIE
and last
RDU
.
Terminal
Description
+
Connects to the + connection on the repeaters
-
Connects to the - connection on the repeaters
SCRN
Field cable screen connection
PB 2 is not currently used and is for future development.
