Power; Ac Power And Earth Ground Connection; Battery Power - Honeywell Fire-Lite Alarms MS-9050UD Manual

2.3 Power

WARNING: Several different sources of power can be connected to this panel. Disconnect all
sources of power before servicing. The panel and associated equipment may be damaged by
removing and/or inserting cards, modules or interconnecting cables while this unit is energized.

2.3.1 AC Power and Earth Ground Connection

Primary power required for the FACP is 120 VAC, 60 Hz, 3.0 amps for the MS-9050UD.
Overcurrent protection for this circuit must comply with Article 760 of the National Electrical
Code (NEC) and/or local codes. Use 14 AWG (2.00 mm
rating. Make certain that the AC mains circuit breaker is off before wiring any connections
between the mains and the control panel. Connect wiring from the AC mains to the Transformer on
the FACP, being careful to observe proper connections.
Connect the AC ground wire to the Ground Stud located in the left side of the backbox. Refer to
Figure 2.2 on page 40 and the illustration below for location of the stud. This connection is vital for
maintaining the control panel's immunity to unwanted transients generated by lightning and
electrostatic discharge. Apply AC power to the panel only after the system is completely installed
and visually checked. Note that AC power must be applied to the panel before installing the battery
interconnect cable (refer to the following section).
Note: For AC connections to the MS-9050UDC, refer to "AC Power Connections for Canadian
Applications" on page 206.

2.3.2 Battery Power

Before connecting the batteries to the FACP, make certain that
the interconnect cable between the batteries is not connected.
Do not connect the interconnect cable until the system is
completely installed. Observe polarity when connecting the
batteries. Connect the battery cable to J1 on the main circuit board. Refer "Power Supply
Calculations" on page 179, for calculation of the correct battery rating.
See Page
WARNING: Battery contains sulfuric acid which can cause severe burns to the skin and eyes and
can destroy fabrics. If contact is made with sulfuric acid, immediately flush the skin or eyes with
water for 15 minutes and seek immediate medical attention.
AC Connection to
Transformer leads:
Battery Connection
to J1 on FACP
IMPORTANT: For AC connections to the MS-9050UDC, refer to "AC Power Connections for
Canadian Applications" on page 206.
MS-9050UD PN 52413:C 01/23/08
HOT
NEUTRAL
Ground Stud
2
) or larger wire with 600 volt insulation
+
-
Installation
Interconnect
Cable
43