104 DAA2 & DAX — P/N 53265:A1 8/24/2011
DAA Digital Audio Amplifiers Installation
• Connect the branch circuit to the line side of the main power feed of the protected premises.
• Do not power other equipment from the fire alarm branch circuit.
• Run the AC branch circuit wire continuously, without any disconnect devices, from the
power source to the power supply.
• Overcurrent protection for the AC branch circuit must comply with Article 760 of the
National Electrical Codes, as well as local codes.
• Use 12-14 AWG (1.6mm O.D.) wire with 600 VAC insulation for the AC branch circuit.
Connect primary power as follows:
1.Turn off the circuit breaker at the main power
distribution panel.
2.Connect the earth ground terminal (TB1
EARTH) to a solid earth ground (a metallic, cold
water pipe may be suitable in some installations).
This connection is vital to maintaining the power
supply’s immunity to unwanted transients
generated by lightning and electrostatic discharge.
3.Connect the primary power neutral line to the
terminal marked NEUTRAL and the primary
power AC line to the terminal marked HOT.
Connecting the DAA Power Supply to the Batteries
The DAA works with two 7 AH minimum to 55 AH maximum batteries. See “Battery
Calculations” on page 122 for current draw calculations to determine the battery size required for
this installation.
DAAs can share batteries as follows:
• 26 AH batteries can accommodate one or two DAAs.
• 55 AH batteries can accommodate up to four DAAs.
Battery cables (90”, 2.28 m) are included with the DAA for battery installation in any CAB-4 series
cabinet that includes a DAA in one of the rows. Shorter battery cables (18”, 0.5 m) are included
with the CHS-BH1. For battery sharing, use 12 AWG wire either in the same cabinet, or in conduit
for no more than 20 ft. (6.09 m.).
Figure C.11 AC Power Connection
EARTH
NEUTRAL
HOT
DAAPStb1.wmf
WARNING: Do not connect the battery interconnect cable (See Figure C.12) at this time. Leave the
battery interconnect cable disconnected until after initial system power-up.
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