Chapter 1: Overview
ZP3 Fire Alarm Control Panel Installation Manual
17
ZP3AB-SCB-D Serial Control Bus Driver Board
The ZP3AB-SCB-D Serial Control Bus Driver Board is used to connect a number
of remote display units (RDUs) and remote control units (RCUs) to a fire panel.
The hardware protocol is a multidrop RS-485 screened, two-wire connection. The
wiring is connected from the ZP3AB-SCB-D board in the panel to the SCB
connections in the RDU and RCU panels. The wiring must be terminated at the
panel by connecting the jumpers as shown in Figure 16. All other panels must
not be terminated, i.e. their jumpers must be removed.
Figure 16: ZP3AB-SCB-D Serial Control Bus Driver Board
Note:
The RDU screen must only be connected on the ZP3AB-SCB1 Serial
Control Bus Driver Board in the ZP3 Panel. The screen must not be connected at
the RDU.
Screen
RS485 line terminations. (Terminate
as shown on the ZP3 panel
Do
terminate on RDU or RCU units.)
only.
not
Remote Display Units (RDUs)
Remote Control Units (RCUs)
ZP3AB-SCB-D
Serial Control Bus
Driver Board
SCB
32
2
1
Do
connect screen
to RDU terminal
not
Do
connect screen
to RDU terminal
not
Do
connect screen
to RDU terminal
not
