Description Of Interfaces; Power Supply; Rs485 (If 1B) On Op 73Micro - Siemens SIMATIC HMI OP 73micro Operating Instructions Manual

Specifications

11.3 Description of interfaces

11.3 Description of interfaces
11.3.1

Power supply

Plug connector, 2-pin
1
Figure 11-3
PIN
11.3.2

RS485 (IF 1B) on OP 73micro

Sub-d socket, 9-pin, with screw lock
Figure 11-4
PIN
1
CAUTION
Power supply
When the HMI device is supplied with power from the CPU, do not connect an external
power supply to it.
146
2
Power supply pin assignment
Assignment
1 +24 V DC
2 GND 24 V
5 1
9 6
RS485 interface pin-out
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
8 Data channel A (–)
9 n. c.
Applies when power is supplied from the CPU
1
OP 73micro, TP 177micro (WinCC flexible)
Operating Instructions, 09/2007, 6AV6691-1DF01-0AB0