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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).
Table 6 RS-485 connection cable for use with RS-232
to RS-485 adapter.
Table 7 RS-232 pin description of the RS-232 to RS-
485 adapter.
Table 8 RS-485 pin description of the RS-232 to RS-
485 adapter
Intellivox DDC | Installation Manual | Appendix
Bosch Security Systems | July 2003
EN
|
19
Master (PC) 9p sub-d Slave (unit) 5p cage clamp 5p XLR
RS-485 Y (+send) 3 RS-485 A (+ receive) 1 5
RS-485 Z (-send) 8 RS-485 B (- receive) 2 4
RS-485 B (-receive) 2 RS-485 Z (- send) 3 3
RS-485 B (+receive) 7 RS-485 Y (+send) 4 2
Ground 1,4,5,6 DGND 5 1
External +9V DC (optional) 9 - - -
RS-232 description RS-232 pin #
NC 1
RX 2
TX 3
DTR 4
GND 5
DSR 6
RTS 7
CTS 8
+9 V 9
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