Master Mode - Federal Signal AudioMaster 310LD-MV Instrucciones De Instalación Y Servicio

A. GENERAL FEATURES.
The 310LD-MV intercom is a 2-way communications device designed
for light duty industrial applications. Nominal operating voltages include
120/240VAC, 50/60 Hz and 24VDC. Voltage changes for the 120/240VAC
are internally switch selectable and the AC line is fused with a 1/2 ampere
250 volt type GMC fuse. The unit also offers internally selectable balanced
or unbalanced line operation, transformer isolated audio inputs and internally
selectable Master or Slave mode configurations. A call button with remote
call dry contacts is also factory supplied in the unit. The 310LD-MV has a
NEMA 1 enclosure and is a UL Listed and CSA Certified signal appliance.

MASTER MODE:

Each intercom can be con Figured as a Master unit (Push-to-Talk) or
a Slave unit (Push-to-Listen) by changing the MAS/SLA jumper (J3) on the
printed circuit board (see Figure 1). The intercom comes from the factory
set in the Master (MAS) mode.
In the Master mode the intercom acts as an amplifier, constantly
broadcasting over its speaker any signal that it receives on the signal lines.
Holding down the Listen/Talk switch changes the unit from a speaker to a
microphone (see Figure 2). The intercom will now transmit over the signal
lines to additional intercom(s) also set in the master mode. When the switch
Figure 1.
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