Manual LPCI-COM-8SM
18
Chapter 6: Connector Pin Assignments
Input/Output Connections
The card’s Serial Communications card uses eight individual 9-pin connectors, provided via a
spider cable from a 68-pin HVDCI D-connector.
To ensure that there is minimum susceptibility to EMI and minimum radiation, it is important that
the card mounting bracket be properly screwed into place and that there be a positive chassis
ground. Also, proper EMI cabling techniques (cable connect to chassis ground at the aperture,
shielded twisted-pair wiring, etc) be used for the input/output wiring.
DB-9 Male Pin for each of
Ch A-G
RS-232 Signals
(Industry Standard)
RS-485 Signals
(2 Wire)
RS-422 Signals
(Also 4wire RS485)
Ch x - 1
DCD
RX-/TX-
1
RX-
Ch x - 2
RX
TX+/RX+
1
TX+
Ch x - 3
TX
TX-/RX-
1
TX-
Ch x - 4
DTR
Ch x - 5
Gnd
Gnd
Gnd
Ch x - 6
DSR
Ch x - 7
RTS
Ch x - 8
CTS
Ch x - 9
RI
RX+/TX+
1
RX+
Table 6-1:
Connector Pin Assignments
1
RS485 (2 wire) requires the installation of jumpers on the card to properly connect these pins.
When using the spider cable, the appropriate DB 9 connectors will have pin 1 connected to pin
3 and pin 2 is connected to pin 9.
