Basler Electric BE1-851 - Manual (Page 282)

Table 12-2. RS-232 Pin-outs (COM0 and COM1)
Name Function Name Direction
1 Shield ---- N/A
2 Transmit Data (TXD) From relay
3 Receive Data (RXD) Into relay
4 N/C ---- N/A
5 Signal Ground (GND) N/A
6 N/C ---- N/A
7 N/C ---- N/A
8 N/C ---- N/A
9 N/C ---- N/A
NOTE
The RS-232 communication ports are not equipped with Request to Send
(RTS) and Clear to Send (CTS) control lines. This makes the BE1-851
incompatible with systems that require hardware handshaking or systems that
use self-powered RS-232 to RS-485 converters connected to the RS-232
ports.
Figure 12-21. RFL 9060 Protective Relay Switch to BE1-851 Cable
12-20 BE1-851 Installation 9289900990 Rev R