Rockwell Automation 1769-L23E-QB1B_L23E-QBFC1B_L23-QBFC1B CompactLogix Packaged Controllers Quick Start and User Manual - Manual (Page 198)

198 Publication IASIMP-QS010B-EN-P - October 2009
Chapter 3 Embedded I/O
Digital Outputs Each of the 1769-L23 and 1769-L23E packaged controllers provides 16
solid-state DC outputs. This section describes how to wire and configure the
OB16 DC outputs.
DC Output Wiring
Basic wiring
(1)
of for the embedded OB16 Discrete Outputs (sourcing
outputs)
(2)
is shown below.
(1) Recommended Surge Suppression - 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
1770-4.1 .
ATTENTION
Miswiring the outputs to an AC power source or applying
reverse polarity causes damage to the outputs.
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.
(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
24V DC (source)
-DC
DC COM
OUT 14
OUT 12
OUT 10
OUT 8
OUT 6
OUT 4
OUT 2
OUT 0
OUT 15
OUT 13
OUT 11
OUT 9
OUT 7
OUT 5
OUT 3
OUT 1
+VDC
CR
CR
CR
CR
CR
CR
CR
CR
CR
CR