Siemens Argus 7SR21 - Optional Rear RS485 + IRIG-B Connection; Optional Rear RS232 + IRIG-B Connection

7SR210 & 7SR220 Configuration Guide
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2.1.4 OPTIONAL REAR RS485 + IRIG-B CONNECTION
Figure 2.1.4-1 Additional (Optional) rear RS485 + IRIG-B connection to a PC
2.1.5 OPTIONAL REAR RS232 + IRIG-B CONNECTION
Figure 2.1.5-1 Additional (Optional) rear RS232 + IRG-B connection to a PC
Pin
Function
1 Carrier Direct (CD)
2 Receive Data (RXD)
3 Transmit Data (TXD)
4 Data Terminal Ready (DTR)
5 Signal Ground (GND)
6 Data set ready (DSR)
7 Request to send (RTS)
8 Clear to Send (CTS)
9 Ring Indicator (RI)