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