RS485 Star Card Manual V14 4Feb04.doc Page 7/29
R
B
R
A
T
R
B
T
R
A
G
N
D
To dome RA(+)/TRA
To dome RB(-)/TRB
Frame ground
Star n
2 wire half-duplex mode
Close up view showing RS485 connection into and out of the Star Card.
RS485 network length maximum
1200M per output.
Please remember to terminate
the last dome of each output.
R
B
R
A
T
R
B
T
R
A
G
N
D
From controller TA(+)
From controller TB(-)
Frame ground
MASTER
2 wire RS485 notes.
1. Ensure that the dome/receiver is set for 2 wire telemetry, half-duplex.
2. The controller must be set for 2 wire using either a rear panel switch or menu access. Half duplex must be
selected from within the setup menu.
3. Baud rates for the controller and dome/receivers must be the same. It is advisable to use 9600 baud to reduce
the possibility of corrupted data causing intermittent control.
Panasonic Specific notes:
FS616 - A single RS485 output is available. Connect the RS485 output to the star card as shown.
SX350 - Two RS485 outputs are available.
SX550/850 - Not required as each matrix RS485 output card has eight individual outputs.
Star 8
Star 7
Star 6
Star 5
Star 4
Star 3
Star 2
Star 1
BBV Starcard
RS232 monitor
8 * RS485 OUT
Supply
9Vdc 500mA
Master
RS485 IN
BBV RS485
or
1 2 3 4 5 6 7 8
SW3 must be configured for 2 Wire
as below: SWITCH 8 ON
5
4
3
2
1
9
8
7
6
GND to
PC pin 5
TX to
PC pin 2
The RS232 output can be taken into
a PC/laptop to allow the Starcard
o u t p u t t o b e d i s p l a y e d u s i n g
Hyperterminal, Telix or other comms
program.
The baud and parity settings should
match the values chosen with SW2.
