CAS CBX - Specifications for the RS-232 C;AUX Connector

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4.3 Specifications for the RS-232C/AUX Connector
Pin number Name Function Remarks
1 FG Frame ground
2 TXD Data output
3 RXD Data input
4 RTS Internal connection with CTS
5 CTS Internal connection with RTS
6 DSR Handshake (receiving)
7 SG Signal grounding
8 NC Blank
9 NC Blank
10 NC Blank
11 NC Blank
12 NC Blank
13 NC Blank
14 NC Blank
15 NC Blank
16 NC Blank
17 NC Blank
18 NC Blank
19 NC Blank
20 DTR
Handshake (receiving)）
21 NC Blank
22 NC Blank
23 NC Blank
24 NC Blank
25 NC Blank
Note: NC= No connection within the balance.