Rockwell Automation Publication 2080-UM002L-EN-E - November 2021 47
Chapter 4 Wire Your Controller
Figure 4 - DC Outputs with Surge Suppression
Suitable surge suppression methods for inductive AC load devices include a
varistor, an RC network, or an Allen-Bradley surge suppressor, shown in
Figure 5
. These components must be appropriately rated to suppress the
switching transient characteristic of the particular inductive device. See
Recommended Surge Suppressors
on page 47 for recommended suppressors.
Figure 5 - Surge Suppression for Inductive AC Load Devices
Recommended Surge Suppressors
Use the Allen-Bradley surge suppressors shown in the following table for use
with relays, contactors, and starters.
+24V DC
IN4004 diode
Relay or solid-state
DC outputs
24V DC common
VAC/DC
Out 0
Out 1
Out 2
Out 3
Out 4
Out 5
Out 6
Out 7
COM
A surge suppressor can
also be used.
Output device Output deviceOutput device
Varistor
RC network
Surge
suppressor
Recommended Surge Suppressors
Device Coil Voltage Suppressor Catalog Number
Type
(4)
Bulletin 100/104K 700K
24…48V AC 100-KFSC50
RC110…280V AC 100-KFSC280
380…480V AC 100-KFSC480
12…55 V AC, 12…77V DC 100-KFSV55
MOV56…136 VAC, 78…180V DC 100-KFSV136
137…277V AC, 181…250 V DC 100-KFSV277
12…250V DC 100-KFSD250 Diode
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