2-9
Main system supply (MSS)
Overview The MSS is the power source for the FACP. It provides 24 VDC card power to the 4010ES.
Table 2-11 lists the MSS capabilities.
The MSS also performs standard fire alarm functions, such as brownout detect, battery transfer,
battery recharge, earth fault detection, and power limiting per UL 864. It is shipped, installed,
and connected in the 4010ES panel. Figures 2-5 and 2-6 illustrate a 4010ES MSS.
Note: The type of MSS you get depends on the base panel selected. See Chapter 3, “Panel
Configurations.”
Figure 2-5. MSS shown with IDNet
Continued on next page
Table 2-11. MSS capabilities
MSS with IDNet MSS without IDNet
8 A of available power 8 A of available power
4 Class A NACs 4 Class A NACs
Battery charger (Note) Battery charger (Note)
1 AUX relay (2 A, 32 V) 1 AUX relay (2 A, 32 V)
1 AUX power tap (2 A) 1 AUX power tap (2 A)
Single channel, Dual Isolated Loop IDNet+
Note: The 4010ES can hold a maximum of 33 Ah batteries in the one-bay box and 50 Ah in the two-
bay box. The MSS charger is listed for 110 Ah UL and 50Ah ULC.
Top Bay
PDI card
Rectifier
Option Card
Blocks
Optional City Card
or Relay Card
Mounting Space
Transformer
AC Block
MSS