Connect Tech Blue Heat/PCI PCI Serial Communications - Manual (Page 26)

Blue Heat/PCI User’s Manual, Connect Tech Inc.
Revision 0.11 26
Table 8: DB-78 pinouts for Blue Heat/PCI RS-232, RS-422/485, Universal Blue Heat/PCI RS-422/485
Pin
No. Port
No. RS-232
Signal Signal
Direction RS-422/485
Signal Signal
Direction
20mA Signal
Direction
1 5 RTS output RTS A(-) output TxD (-) output
2 5 CTS input RTS B(+) output RxD (+) input
3 5 DSR input CTS A(-) input RxD Ret. input
4 5 RI input CTS B(+) input RxD Src. input
5 5 SG signal gnd. SR signal ref. SG signal ref
6 6 RTS output RTS A(-) output TxD (-) output
7 6 CTS input RTS B(+) output RxD (+) input
8 6 DSR input CTS A(-) input RxD Ret. input
9 6 RI input CTS B(+) input RxD Src. input
10 7 RTS output RTS A(-) output TxD (-) output
11 7 CTS input RTS B(+) output RxD (+) input
12 7 DSR input CTS A(-) input RxD Ret. input
13 7 RI input CTS B(+) input RxD Src. input
14 7 SG signal gnd. SR signal ref. SG signal ref
15 8 RTS output RTS A(-) output TxD (-) output
16 8 CTS input RTS B(+) output RxD (+) input
17 8 DSR input CTS A(-) input RxD Ret. input
18 8 RI input CTS B(+) input RxD Src. input
19 NC no connect NC no connect NC no connect
20 NC no connect NC no connect NC no connect
21 5 TxD output TxD A(-) output TxD Src. output
22 5 RxD input TxD B(+) output TxD (+) output
23 5 DTR output RxD A(-) input TxD Ret. output
24 5 DCD input RxD B(+) input RxD (-) input
25 6 SG signal gnd. SR signal ref. SG signal ref
26 6 TxD output TxD A(-) output TxD Src. output
27 6 RxD input TxD B(+) output TxD (+) output
28 6 DTR output RxD A(-) input TxD Ret. output
29 6 DCD input RxD B(+) input RxD (-) input
30 7 TxD output TxD A(-) output TxD Src. output
31 7 RxD input TxD B(+) output TxD (+) output
32 7 DTR output RxD A(-) input TxD Ret. output
33 7 DCD input RxD B(+) input RxD (-) input
34 SG signal gnd. NC no connect NC no connect
35 8 TxD output TxD A(-) output TxD Src. output
36 8 RxD input TxD B(+) output TxD (+) output
37 8 DTR output RxD A(-) input TxD Ret. output
38 8 DCD input RxD B(+) input RxD (-) input
39 8 SG signal gnd. SR signal ref. SG signal ref
…Continued on the next page