Black Box IC476A-F-R2 - Manual (Page 23)

22
ASYNC 232
↔422/485 CONVERTER
The pinout below applies to models IC477A-F-R2, IC477A-M-R2,
IC478A-F-R2, IC478A-M-R2.
Pin Number Pin Name
2 TXA (positive)
3 RXA (positive)
14 TXB (negative)
16 RXB (negative)
4 RTS A (positive)*
5 CTS A (positive)
6 DCE Ready A (positive)
8 Rcv. Line Signal Detect A (positive)*
10 Rcv. Line Signal Detect B (negative)*
13 CTS B (negative)
19 RTS B (negative)*
20 DTE Ready A (positive)
22 DCE Ready B (negative)
23 DTE Ready B (negative)
*Has internal function as well as being looped to the associated pin in the
diagram.
Appendix B. 422/485 (530)
Pin Configuration