Connecting The Digital I/O - Thermo Scientific Dionex ICS Series Operator's Manual

B.6 Connecting the Digital I/O
Two digital I/O ports (A and B) on the Dionex VWD rear panel (see
provide four TTL inputs and four relay outputs for communication with external
devices. The two ports are identical in function.
Digital out
relay common
Digital in
plus 1
Digital in
plus 3
Table B-1 lists the functions assigned to the connector pins and the color of the
cable wire connected to each pin.
Pin Signal Name
1 Digital out relay 3
(port A)
Digital out relay 4
(port B)
2 Digital in plus 3
(port A)
Digital in plus 4
(port B)
3 Digital in common
5 Digital in plus 1
(port A)
Digital in plus 2
(port B)
Table B-1. Digital I/O Ports A and B Pin and Cable Wire Assignments
Doc. 065377-01 1/12
A
Digital out
relay 1
8 6
Digital in
common
5 3
2
1
Digital out
relay 3
Figure B-7. 6-Pin Mini-DIN Digital I/O Ports
Signal Level
Potential
free
TTL
Potential
free
TTL
Digital out
relay common
8
Digital in
plus 2
5
Digital in
plus 4
Wire Color Remark
Pink (or If the relay is activated, the
Red) connection is between the
Digital out relay and the
Digital out relay common.
Gray A voltage between 0 and +10V
with respect to Digital in
common can be applied to the
input. A voltage of +4V is
sufficient to switch the input.
Green Ground for the Digital in plus
signals.
Yellow A voltage between 0 and +10V
with respect to Digital in
common can be applied to the
input. A voltage of +4V is
sufficient to switch the input.
B • Installation
Figure B-6)
B
Digital out
relay 2
6
Digital in
common
3
2
1
Digital out
relay 4
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