Card Connections and Installation
4-16
Typical digital I/O connection schemes
Output connection schemes
The following examples show output connections from the
card to external circuitry and summarizes the required inter-
nal connections on the card. Each example assumes negative
true logic is used. To configure for positive true logic, refer
to the Configuring digital I/O output logic paragraph.
Solenoid control —
Figure 4-15 shows a digital output con-
nection scheme to control solenoids. This example assumes
that an external 24V source is being used. A solenoid is ener-
gized when the corresponding output channel is turned on
(closed).
Figure 4-15
Digital output, solenoid control
Motor control —
Figure 4-16 shows a digital output con-
nection scheme to control small 12V dc motors. An external
12V source is used to provide the necessary voltage level. A
motor is turned on when the corresponding output channel is
turned on (closed).
Figure 4-16
Digital output, motor control
OUT 31
V
EXT
SOLENOIDS
7022
OUT 32
OUT 33
GND
24V
+
–
INTERNAL CONNECTIONS:
EXTERNAL VOLTAGE SOURCE (V
EXT
) SELECTED.
OUT 39
V
EXT
MOTORS
7022
OUT 40
GND
12V
+
–
INTERNAL CONNECTIONS:
EXTERNAL VOLTAGE SOURCE (V
EXT
) SELECTED.
M
M
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