Rockwell Automation Publication 2100-IN012G-EN-P - August 2016
65
Installing and Removing Plug-in Units
Chapter 4
Use these guidelines to help size the power supply external to the MCC.
• UL Listed
• Voltage: 24V nominal with -5 % /15 % (22.8…27.6V) voltage
tolerance over load
• Current: 8 A min to 20 A max rated output
• Load Regulation: 100 mV maximum over 0…8 A
• Load Ripple: 50 mVpp maximum
The existing power supply is pre-wired at the factory to terminal blocks in the
horizontal wireway.
4. Move this 24V DC wire connection from the terminal block within the
power supply unit to the output terminal block of the two-branch
redundant unit.
Terminals PS+ and PS- are for the left 4 A branch, and RS+ and RS- are
for the right 4 A branch.
On the incoming side, for redundant operation, independent power
supplies are required.
TIP
A separate two-branch redundant unit is required for each 24V, 8 A circuit in
the MCC.
Output For Left
4 A Branch
Output For Right
4 A Branch