2-10
Chapter 2 Installing FACP Components
EPS CPU Bay Overview (continued)
Extended Power
Supply with
IDNet 2
The EPS with IDNet 2 is the power source for the CPU and the host cabinet. The EPS provides
24 VDC card power to the CPU motherboard.
The EPS provides voltage and current information to the CPU card, which can then be
displayed at the user interface. The IDNet 2 card on the EPS provides one IDNet channel that
supports initiating devices and some notification appliances, such as the 4009-9201/9301
Audio NAC Extender.
Auxiliary power, relay, and city circuit/relay module functions are also supported.
The EPS performs standard fire alarm functions, such as brownout detect, battery transfer,
battery recharge, earth fault detection, and power limiting in accordance with UL 864.
Figure 2-8 is an illustration of the EPS. See Figure 2-9 for the IDNet 2 card.
Figure 2-8. EPS with IDNet 2 (566-872)
Continued on the next page
IDNAC
Terminals
Auxiliary/
NAC
RUI+ Earth
Detect
Connection to
Batterries
Connection
to Bridge
Battery Disconect
Jumper
Address
Switch
Trouble Scroll
Button
Earth Detect Jumper
4 Pin Harness
Card Power /
Comms
Connection
to PDI
LEDs
City Card Connection
21
3
7
6
548
)$.!#
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)$.!#
!58
A
B
C
D
E
CH1
CH2
CH3
COM
IDNet 2
Card
IDNET 2
1
2
34
5
678
B+
B-A+A-
B+B-A+A-
LOOP 1LOOP 2
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