11
Fastcom
®
: 422/4-PCI-335
FASTCOM: 422/4-PCI-335 ADAPTER CABLE
We provide access to the four channels of the FASTCOM: 422/4-PCI-335 through a shielded DB37 connector
and an adapter cable (supplied with the board). The adapter cable consists of a DB37 male plug fanning out to
four standard DB9 female receptacles.
DB37 Pin Description
DB9 Pin Description
The FASTCOM: 422/4-PCI-335 features four RS-422/RS-485 channels, which
are accessed through four DB9 connectors on the cable assembly.
The following is a pin description of the DB9 connectors:
PIN NO.
SIGNAL NAME
DIRECTION
9
8
7
6
5
4
3
2
1
TX+
TX-
RX+
RX-
RTS-
CTS+
RTS+
GND
CTS-
1
SIGNAL GROUND (GND)
GROUND
2
READY TO SEND (RTS) +
OUTPUT
3
READY TO SEND (RTS)
–
OUTPUT
4
TRANSMIT DATA (TX) +
OUTPUT
5
TRANSMIT DATA (TX)
–
OUTPUT
6
CLEAR TO SEND (CTS) +
INPUT
7
CLEAR TO SEND (CTS) -
INPUT
8
RECEIVE DATA (RX) +
INPUT
9
RECEIVE DATA (RX)
–
INPUT
Cable
We recommend using vinyl jacketed, shielded, multiple twisted pair cable (24 AWG
wire) for use with the FASTCOM: 422/4-PCI-335. The following cable illustration
shows how to connect two RS-422 devices. Note that disabling handshaking can
eliminate CTS/RTS lines.
TX+
TX-
RTS+
RTS-
CTS+
CTS-
TX+
TX-
RTS+
RTS-
CTS+
CTS-
RX+
RX-
RX-
RX+
GND
GND
1
2
3
4
5
6
7
8
10
11
12
13
14
15
16
17
18
19
N.C
RTS-4
GND
RX-4
TX-4
CTS+3
RTS+3
RX+3
TX+3
RTS-2
GND
RX-2
TX-2
CTS-1
CTS+1
RTS+1
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
CTS-4
CTS+4
RTS+4
RX+4
TX+4
RTS-3
GND
RX-3
TX-3
CTS-2
CTS+2
RTS+2
RX+2
TX+2
RTS-1
GND
RX-1
TX-1
RX+1
TX+1
9
CTS-3
Artisan Technology Group - Quality Instrumentation ... Guaranteed | (888) 88-SOURCE | www.artisantg.com
