Clear-Com SB-704 - Manual (Page 21)

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• INDIVIDUAL CHANNEL SHORT CIRCUIT PROTECTION: Each
individual channel is separately overload and short circuit protected and
may draw as much as 1.2 amperes, though the total to both channels is
limited to 2 amperes. A short on any one intercom line will not bring the
whole system down.
Note: Power supply lines connected together at remote stations will dis-
able the individual channel short circuit protection feature.
• FRONT PANEL “SHORT” LIGHTS: There are four short lights on the
front panel (one for each channel). The short lights illuminate steadily
when an overload or short condition is detected. They blink if power to a
channel has been shut off as a result of an overload or short.
• PARALLELING MULTIPLE POWER SUPPLIES: Multiple power
supplies can be paralleled to increase system capacity. The SB-704’s
internal power supply will automatically detect the actions of other power
supplies during overloads and short circuits to restore power as quickly as
possible.
• LOW NOISE CIRCUITRY: The direct current outputs of the SB-704’s
internal power supply contain very little hum and noise. The power
supply does not contribute to audible noise in the remote stations and
beltpacks.
• CONNECTION TO AC MAINS: The AC power line supplies power to
the SB-704’s internal power supply. The power supply will accept any
line voltage between 100 and 240 VAC at 50-60 Hz. It will automatically
adjust to the line voltage. There is no need for a voltage selector switch or
an external fuse. The unit draws a maximum of 60 VA of power from the
AC line. Clear-Com power supplies can be paralleled to increase the
number of remote stations that can be operated in a system.