Specifications
11.3 Description of interfaces
OP 73micro, TP 177micro (WinCC flexible)
146
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0
11.3
Description of interfaces
11.3.1
Power supply
Plug connector, 2-pin
2
1
Figure 11-3 Power supply pin assignment
PIN
Assignment
1
+24 V DC
2
GND 24 V
11.3.2
RS485 (IF 1B) on OP 73micro
Sub-d socket, 9-pin, with screw lock
1
5
9
6
Figure 11-4 RS485 interface pin-out
PIN
Assignment
1
n. c.
2
GND 24 V
3
Data channel B (+)
4
RTS
5
GND 5 V
6
+5 V DC
7
24 V DC, out (max. 100 mA) or 24 V DC in
1
8
Data channel A (–)
9
n. c.
1
Applies when power is supplied from the CPU
CAUTION
Power supply
When the HMI device is supplied with power from the CPU, do not connect an external
power supply to it.
