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B–14
Host I/O Interfaces
Table B–6. RS422 Pin–out Comparison
Pin L1016 RS232 L1016 RS422 L1024 RS232/RS422
1 Ground Ground Ground
2 TX (Output) TX+ (Output +) TX (Output)
3 RX (Input) RX+ (Input+) RX (Input)
4 RTS (Output) RTS+ (Output +) RTS (Output)
5 CTS (Input) CTS+ CTS (Input)
6 DSR (Input) DSR+ DSR (Input)
7 Ground Ground Ground
8 DCD (Input)
9
10
11
12
13 CTS– (Input–)
14 TX– (Output–)
15 RX– (Input–)
16 RX– (Input–)
17 RX+ (Input+)
18
19 RTS– (Output–) TX– (Output–)
20 DTR (Output) DTR+ (Output+) DTR (Output)
21
22 DSR– (Input–)
23 DTR– (Output–)
24
25 TX+ (output+)