BIA-DPC3 rev 5
Page 43
9.1 Basic function.
Slave Controller (SC) with communication interface can realize long distance monitoring. In the control room, users can realize
all the functions of the master control panel through the SC, except parameter calibration and adjusting.
9.2 Special application.
As adopting communication interface, the wire communication distance is less than 1200 metres. For those installation
environments which require a longer distance communication, i.e., mine, water tower, across railway road and bridge etc., users
can adopt RS485 extender, wireless communication or GSM. Please contact the manufacturer for more information.
9.3 Technical parameters.
The following chart shows main technical parameters of communication between the control panel and the slave controller.
Main technical data
Physical interface
RS485 Bus Interface: asynchronous semi duplex
Data format
1 start bit, 8 data bit, 1 stop bit, no verify
1 start bit, 8 data bit, 2 stop bit, no verify
Default: 1 start bit, 8 data bit, 1 stop bit, no verify
Baud rate
1200,2400,4800,9600 bps (default 9600bps)
Communication address
Setting range of controller address: 1-126
127: broadcast address, host computer broadcasting,
slave machine response forbidden
Protocol type
MODBUS protocol (RTU)
Rated input voltage for SC
AC 240V/50Hz, single phase
Main installation data
Wire communication distance
1200 metres max by shield twisted pair cable (STP)
for RS485 & CAN
5000 metres max by STP and RS485 extender
STP
STP-120U one pair 20AWG for RS485 & CAN
RS485 extender
5000 metres (9600bps)
