B
I/O Connections
B-1
B.1
Typical output connection schemes
The following examples show output connections from the
I/O circuitry to external circuitry and summarize the required
internal connections on the card.
Solenoid control
— Figure B-1 shows a digital connection
scheme to control solenoids. This example assumes that an
external 24V source is being used. The pull-up resistors for
output channels 1, 2, and 3 are removed for this application.
A solenoid is energized when the corresponding output
channel is turned on (closed).
Relay control
— Figure B-2 shows a digital output connec-
tion scheme to control relays. This example assumes that the
internal 5.3V source is being used, and the pull-up resistors
for output channels 9, 10, and 11 are removed.
A relay coil is energized when the corresponding output
channel is turned on (closed).
Figure B-1
Digital output, solenoid control
Figure B-2
Digital output, relay control
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