Manual 104i-COM-8SM
17
Cable accessories are available to provide interface to the 40-Pin headers on this board,
connecting to a 40 pin screw terminal board, a DB37 for panel or enclosure mounting (an
external / system cable is optionally available to mate with that DB37 and breaks it out to
four DB9M’s) or to four DB9M connectors.
DB9 Male
DB-9 Male Pin for
each of Ch A-H
RS-232 Signals
(DTE Standard)
RS-232 Signal
Descriptions
Ch x - 1
DCD
Data Carrier Detected
Ch x - 2
RX
Receive Data
Ch x - 3
TX
Transmit Data
Ch x - 4
DTR
Data Terminal Ready
Ch x - 5
GND
Signal Ground
Ch x - 6
DSR
Data Set Ready
Ch x - 7
RTS
Request To Send
Ch x - 8
CTS
Clear to Send
Ch x - 9
RI
Ring Indicator
Table 6-3:
DB9M Accessory Cable RS-232 Pin Assignment
DB-9 Male Pin for
each of Ch A-H
RS-422 Signals
RS-422 Signal
Descriptions
Ch x - 2
TX+
Transmit Data +
Ch x - 4
RX+
Receive Data +
Ch x - 5
GND
Signal Ground
Ch x - 7
TX-
Transmit Data -
Ch x - 8
RX-
Receive Data -
Table 6-4:
DB9M Accessory Cable RS-422 Pin Assignment
DB-9 Male Pin for
each of Ch A-H
RS-485
Signals (2 Wire)
RS-485 Signal
Descriptions
Ch x - 2
TX/RX +
Transmit / R
Ch x - 4
TX/RX -
Transmit / Receive -
Ch x - 5
GND
Signal Ground
Table 6-5:
DB9M Accessory Cable RS-485 Pin Assignment
