Allen-Bradley 2080-LC20-20QBB User Manual page 49

Rockwell Automation Publication 2080-UM005E-EN-E - March 2018
The following diagram shows an output with a suppression device. We
recommend that you locate the suppression device as close as possible to the load
device.
VAC/DC
Out 0
Out 1
Out 2
AC or DC
outputs
Out 3
Out 4
Out 5
Out 6
COM
If the outputs are DC, we recommend that you use an 1N4004 diode for surge
suppression, as shown below. For inductive DC load devices, a diode is suitable. A
1N4004 diode is acceptable for most applications. A surge suppressor can also be
used. See Recommended Surge Suppressors on
surge suppression circuits connect directly across the load device.
VAC/DC
Out 0
Out 1
Out 2
Relay or solid
Out 3
state DC outputs
Out 4
Out 5
Out 6
24V DC common
COM
Suitable surge suppression methods for inductive AC load devices include a
varistor, an RC network, or an Allen-Bradley surge suppressor, all shown below.
These components must be appropriately rated to suppress the switching
+DC or L1
Suppression
device
Load
page 40. As shown below, these
+24V DC
Wire Your Controller Chapter 4
DC COM or L2
IN4004 diode
A surge suppressor
can also be used.
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