Standard Rear Rs485 Connection; Optional Rear Fibre Optic Connection - Siemens Argus 7SR21 Technical Manual

7SR210 & 7SR220 Configuration Guide
2.1.2
S
TANDARD REAR
2.1.3
O
PTIONAL REAR FIBRE OPTIC CONNECTION
Figure 2.1.3-1 Additional (Optional) rear fibre optic connection to a PC
Sigma devices have a 25 pin female D connector with the following pin out.
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RS485
CONNECTION
Figure 2.1.2-1 Standard rear RS485 connection to a PC
Pin
2
3
4
5
6
7
8 Received Line Signal Detector
20
Function
Transmit Data
Received Data
Request to Send
Clear to Send
Data set ready
Signal Ground
Data Terminal Ready
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