• Backup audio wiring is unsupervised.
• Maximum speaker circuit current is 2 A per circuit.
• Total available power is 100 W (4 A @ 25 VRMS, 1.414 A @ 70.7 VRMS).
• Terminal designations "+" and "-" are for the alarm state.
• When required, shields are normally connected to 0 V as shown. Alternate shield termination using Earth ground is provided on the amplifier
chassis.
Class A Wiring
Figure 7: Class A Wiring
Note: For guidance regarding proper wiring practice when using the TrueAlert ES speaker appliances, refer to the Speaker Wiring Application
Guidelines in the ES-PS IDNAC Card Installation Instructions, 579-1289.
• Leave the 10 K,1/2 W resistors (378-030; brown/black/orange) on the "B+" to "B-" terminals of unused circuits.
• All wiring is between 18 AWG (0.8231 mm
2
) and 12 AWG (3.309 mm
2
).
• All field wiring and backup audio wiring is power-limited.
• Backup audio wiring is unsupervised.
• Maximum speaker circuit current is 2 A per circuit.
page 10 579-174 Rev. Q
Digital/Analog Amplifiers Installation Instructions
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