Rockwell Automation Publication 1769-UM021G-EN-P - October 2015
311
Appendix
B
Replacement Considerations
The CompactLogix™ L1 Series B controller is a direct replacement for the Series
A controller. The Series B controller has an improved power supply circuit to the
isolated power supply so that a second power supply is no longer needed.
The Series A controller requires two power supplies:
•
One to supply the controller power (VDC)
•
One to supply the field power (FP)
Product Comparison
Power Considerations
CompactLogix L1 Series A and Series B
Embedded DC Input Considerations
CompactLogix L1 Series A and Series B
Firmware Compatibility
CompactLogix L1 Series A and Series B
Characteristics
CompactLogix L1 Series B
CompactLogix L1 Series A
Power dissipation
11.5 W
12 W
Recommended external short circuit
protection, field power
User-provided 4...5 A @ 3.15...5.5
A2t fuse
User-provided 4...6 A @
52.5...68.25 A2t fuse
Embedded power supply
24V DC input, isolated
24V DC input, non-isolated
Line requirement (V DC), min
30VA
50VA
Current draw @ 24V DC, field power,
max
3 A @ 24V DC
N/A
Characteristics
CompactLogix L1 Series B
CompactLogix L1 Series A
Off-state current, max
1 mA
1.5 mA
Input impedance, max
5.4 k
Ω
4.7 k
Ω
Firmware Revision
20.011
20.012
20.013
20.014
20.011
23.012
24.011
Series A
yes
yes
yes
yes
yes
yes
yes
Series B
no
no
no
yes
no
no
yes