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Intellivox DDC | Installation Manual | Appendix
Master device
As mentioned before the RS-485 network concept
needs one master device. This master device (network
controller) is composed of a PC running WinControl
and a RS-232 to RS-485 adapter connected to the RS-
232 port of the PC. Detailed information about the
WinControl program can be found in the related help
file.
The RS-232 to RS-485 adapter is a small 9-pin sub-D
device which can be connected to one of the computer's serial
COM ports. In the normal case the adapter is directly powered
from the RS-232 terminal of the PC. The RS-232 to RS-485
adapter is not galvanically isolated. The adapter is intended
for network connections during installation, maintenance or
operation whenever control over specific process parameters is
needed. In conjunction with the adapter a dedicated cable is
needed with a 9-pin sub-D female connector and a WAGO
cage clamp connector (see Table 6 to Table 8).
Master (PC)
RS-485 Y (+send)
RS-485 Z (-send)
RS-485 B (-receive)
RS-485 B (+receive)
Ground
External +9V DC (optional)
Table 6 RS-485 connection cable for use with RS-232
to RS-485 adapter.
RS-232 description
NC
RX
TX
DTR
GND
DSR
RTS
CTS
+9 V
Table 7 RS-232 pin description of the RS-232 to RS-
485 adapter.
Bosch Security Systems | July 2003
All manuals and user guides at all-guides.com
9p sub-d
Slave (unit)
3
RS-485 A (+ receive)
8
RS-485 B (- receive)
2
RS-485 Z (- send)
7
RS-485 Y (+send)
1,4,5,6
DGND
9
-
RS-232 pin #
1
2
3
4
5
6
7
8
9
5p cage clamp
1
2
3
4
5
-
RS-485 desciption
RS-485 pin #
GND
1
RS-485 B (-receive)
2
RS-485 Y (+send)
3
GND
4
GND
5
GND
6
RS-485 B (+receive)
7
RS-485 Z (-send)
8
+9 V DC
9
Table 8 RS-485 pin description of the RS-232 to RS-
485 adapter
EN | 19
5p XLR
5
4
3
2
1
-
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