Beyerdynamic MCW DIGITAL 200 Notice D'utilisation page 57

3.4 Powering / Operating Time
Rear view microphone unit
(2)
3.5 Powering with external CA 2455 Power Supply Unit
Rear view microphone unit
(1)
3.6 Powering MCW-D 2673
(1)
• The microphone units have an integrated rechargeable battery (except
MCW-D 2xxx DC versions) allowing an operating time of at least 9 hours
in discussion mode.
• As soon as the capacity is too low for satisfactory operation, the operating
control LED (2) will flash.
• The remaining time of operation is around 30 or 60 minutes, depending
on the configuration with the MCW-D 200 Editor software.
• The decreasing battery voltage is also signaled by the MCW-D 200 control
unit at the RS 232 or LAN interface and can be evaluated by an external
media control system.
• The MCW-D microphone units (except the MCW-D 2xxx DC versions)
can be powered with the CA 2455 external power supply unit which can
be connected to the multi-function socket (1).
• If another power supply unit is to be connected, the DC-voltage
should be 18 V DC (±0.5 V), current max. 180 mA, residual hum
< 20 mV AC.
Important:
• Connect and disconnect the external power supply only when
the microphone unit is switched off.
• If the microphone unit is powered by the DC-power supply
first and when the power supply is switched off, the micro-
phone unit will be powered by the integrated battery until it
is nearly empty. The microphone unit switches off automatically
to avoid an exhaustive discharge.
• The microphone unit is not powered automatically, when the
CA 2455 external power supply unit is connected to it. The
microphone unit has to be switched on after having connected
the power supply unit.
• The MCW-D 2673 system units are powered via DC voltage (between
14 and 20 V) that is connected to the terminal strip (1).
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