Bosch Appliances LBC 325X Master device, RS-232 pin description of the RS-232 to RS- 485 adapter

Intellivox DDC Installation Manual Appendix EN 19

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)			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	-			-		-

Table 6 RS-485 connection cable for use with RS-232 to RS-485 adapter.

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

Table 7 RS-232 pin description of the RS-232 to RS- 485 adapter.

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

Bosch Security Systems July 2003