50 Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
Chapter 2 Install the CompactLogix 5370 L2 Controller
Wire Size and Terminal Screw Torque
Each terminal accepts one or two wires with the following restrictions.
Connect Power to the Control System
You must connect an external Class 2 or SELV-listed power supply to the
embedded power supply of the controller. The external power supply converts
115/230V AC power to 24V DC.
Consider these points before completing the steps in this section:
• This section describes how to connect power only to the embedded power
supply of the CompactLogix 5370 L2 controller.
For information on how to wire the embedded I/O module available on
CompactLogix 5370 L2 controllers, see Embedded I/O Modules
on
page 184.
• Not all Class 2 or SELV-listed power supplies are certified for use in all
applications, for example, use in nonhazardous and hazardous
environments.
Before installing an external power supply, consult all specification and
certification information to verify that you are using an acceptable external
power supply.
• This section describes how to wire terminals +24VDC and COM on the
CompactLogix 5370 L2 controller. They are the only terminals you wire
to power the CompactLogix 5370 L2 control system.
Use only the FG terminal when connecting a field device to the controller.
For example purposes, this section uses a 1606-XLDNET4, standard switched-
mode power supply.
Wire Type Wire Size Terminal Screw Torque Retaining Screw Torque
Solid Cu-90 °C (194 °F) #14…#22 AWG 0.68 N•m (6 lb•in) 0.46 N•m (4.1 lb•in)
Stranded Cu-90 °C (194 °F) #16…#22 AWG 0.68 N•m (6 lb•in) 0.46 N•m (4.1 lb•in)
WARNING: Do not connect directly to line voltage. Line voltage must be
supplied by a suitable, approved isolating transformer or power supply having
short circuit capacity not exceeding 100VA maximum or equivalent.
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