Rockwell Automation 1747-ACNR15 ControlNet Adapter Module User Manual - Manual (Page 112)

Publication 1747-UM003A-EN-P
B-20 Understanding Your SLC 500/1746 Control System
Class I, Division 2 Applications (United States Only)
Output Contact Protection
Inductive load devices such as motor starters and solenoids may require the use
of some type of surge suppression to protect the controller output contacts.
Switching inductive loads without Surge Suppression can significantly reduce
lifetime or relay contacts. The figure below details the use of surge suppression
devices.
Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
115-125V dc
115-125V dc
700-N11
700-N14
Bulletin 700 Type R Relay
Bulletin 700 Type RM Relay
230-250V dc
230-250V dc
700-N12
700-N15
Bulletin 700 Type N, P, or PK Relay 150V max, ac or dc
700-N24
(2)
Miscellaneous electromagnetic
devices limited to 35 sealed VA 150V max, ac or dc
700-N24
(2)
(1) Series C or later of these catalog numbers do not contain capacitors. They are recommended for use with SLC
500 triac outputs.
(2) Not recommended for use with triac outputs.
IMPORTANT
When installing peripheral devices (for example, push
buttons, lamps) into a hazardous environment, ensure that
they are Class I, Division 2 certified, or determined to be
safe for the environment.
Table B.3 Recommended Suppressors
Device Coil Voltage Suppressor Catalog
Number
- +
Surge Suppression for Inductive ac Load Devices
Output Device Output Device Output Device
Output Device
Surge Suppression for Inductive dc Load Devices
Diode (A surge suppressor can also be used).
contact protection methods for inductive ac and dc outputs
Varistor RC Network
Surge Suppressor