Rs-232C/Rs-485 Interface - Sony SVT-S168P Bedienungsanleitung

RS-232C/RS-485 Interface

Pin assignment
RS-232C connector (D-sub 9-pin, female)
1
6
Pin No. Signal Operation
2 RXD Receive data
3 TXD Send data
7 RTS Request to send
5 GND Signal ground
RS-485 connector (RJ-11)
1
Pin No. A terminal signal
1 Not used
2 Not used
3 A signal
4 B signal
5 Not used
6 Not used
6 1
not used
1
not used
2
3
4
not used
5
not used
6
Straight type
6 1
not used
1
not used
2
3
4
not used
5
not used
6
Cross type
48
(GB)
5
9
Signal Direction
VCR T Computer
VCR t Computer
VCR t Computer
6
B terminal signal
Not used
Not used
B signal
A signal
Not used
Not used
6 1
1
2
3
4
5
6
6 1
1
2
3
4
5
6
Make the connection to the RS-485 control terminal
using a modular cable (not supplied).
• If using a straight type cable, connect it between the
A terminals, or between the B terminals (see
illustration below).
• If using a crossed type cable, connect it from the A
terminal to the B terminal, or from the B terminal to
the A terminal (see illustration below).
To terminal A
Straight-type cable
ADDRESS
RS-485/RS-232C selector
RS-485 TERMINATE switches
(DIP switches)
ADDRESS
ON
1 2 3 4 5 6 7
OFF
Switch No. Operation
1 - 7 Set address (1 is lowest bit and 7 is
highest) (ON:1, OFF:0)
7 is effective when using RS-485 connector
8 Not used
9 Select RS-485 or RS-232C
10 Terminate on/off when using RS-485
connector
RS-485
A B
To terminal A
Cross-type cable
RS-485 TERMINATE
ON
8 9 10
OFF
RS-232C