Siemens Vector Control Operating Instructions Manual page 262

Connecting-up
X300 - Serial
interface
5 1
9 6
7-18
Either an OP1S or a PC can be connected up via the 9-pole Sub D
socket.
Pin Name
1 n.c.
2 RS232 RxD
3 RS485 P
4 Boot
5 M5V
6 P5V
7 RS232 TxD
8 RS485 N
9 M_RS232/485
Table 7-9 Serial interface X300
Meaning
Not connected
Receive data via RS232
Data via RS485
Control signal for software
update
Reference potential to P5V
5 V aux. voltage supply
Transmit data via RS232
Data via RS485
Digital ground (choked)
Operating Instructions
05.2006
Range
RS232
RS485
Digital signal, low active
0 V
+5 V, Imax = 200 mA
RS232
RS485
6SE7087-2JD60 Siemens AG
SIMOVERT MASTERDRIVES