Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual User Manual
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Publication IASIMP-QS010B-EN-P - October 2009
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Embedded I/O Chapter 3
Output Wiring
The four output terminals must be powered by a user-supplied external source.
User power range is from 5…30V DC. There is no isolation between the
outputs, however the outputs are isolated from the inputs and the 1769
packaged controller.
High-speed Counters Output Wiring
Basic wiring
(1)
of outputs
(2)
for the high-speed counters is shown below.
ATTENTION
Miswiring of the embedded HSC to an AC power source or
applying reverse polarity causes damage to the embedded
HSC.
Be careful when stripping wires. Wire fragments that fall into
a wiring terminal could cause damage at powerup. Once
wiring is complete, make sure the terminal is free of all metal
fragments.
(1)
Recommended Surge Suppression - The embedded HSC has built-in suppression which is sufficient for most applications,
however, for high-noise applications, use a 1N4004 diode reverse-wired across the load for transistor outputs switching 24V
DC inductive loads. For additional details, refer to Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley
publication
.
(2)
Sourcing Output - Source describes the current flow between the I/O and the field device. Sourcing output circuits supply
(source) current to sinking field devices. Field devices connected to the negative side (DC Common) of the field power supply
are sinking field devices. Field devices connected to the positive side (+V) of the field supply are sourcing field devices. Europe:
DC sinking input and sourcing output circuits are the commonly used options.
+DC
+5/24 V DC
-DC
Z1-
B1-
A1-
Z0-
B0-
A0-
OUT
DC COM
OUT 2
OUT 0
Z1+
B1+
A1+
Z0+
B0+
A0+
OUT 3
OUT 1
OUT DC
+5/24VDC
CR
CR
CR