GME Electrophone TX4200 Series, Инструкция по эксплуатации

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WARNING: The External Alarm Output is for
connecting to loads of no more than 1 Amp.
This is sufficient to drive piezo alarm units,
small buzzers etc. If you need to connect a
more powerful device, we recommend you
connect a slave relay as shown below so that
the relay contacts can provide the high current
switching. Damage to the Alarm output
switching circuit caused by connection to
excessive loads may not be covered under
warranty.
External Trigger Input
The TX4200’s external trigger input has been
designed to accept an “active low” input from an
external alarm device. “Active low” means the
radio can detect an input which switches to
ground (0 Volts). When the “active low” input is
detected, the TX4200 will automatically switch
to the Page channel and will transmit the Page
Ident 3 times
(see section on dealer
programmable options
) just to make sure it gets
through over momentary noise or interference.
A receiver programmed with the Page Ident
which is monitoring the Page channel ( such as
the GME PG4000 Paging receiver) will then be
activated to alert you to the alarm condition.
To get the most benefit from the alarm function,
the TX4200 should be connected to a
continuous 13.8 Volt supply so that it is always
ready to be activated by the external trigger
input.
Input Alarm Priority
Activation of the Alarm Input function takes
priority over all other functions. Whenever an
Alarm input is detected, the TX4200 gives
priority to transmitting the Alarm signal.
If your TX4200 has been turned OFF with the
Volume/On/Off switch, IT WILL EVEN TURN
ITSELF ON AGAIN AUTOMATICALLY to
transmit the Alarm signal, then turn itself Off
again (as long as it is connected to a continuous
13.8 Volt supply).
Input Alarm Operation
If the TX4200 detects an Alarm input, it will:
• Turn itself ON (if it was turned OFF).
• Select the Page channel (usually Ch 23)
• Check that the channel is clear. If the
channel is busy, it will wait for a suitable
break in the transmission.
• Transmit the Page Ident.
The radio will then return to whatever it was
doing and ‘AL’ will be displayed to indicate that
an alarm signal has been sent.
If the radio was turned OFF when the alarm
input was detected, it will return to the OFF
mode after the alarm has been sent. When the
radio is turned on again using the Volume/On/
Off switch, it will have retained it’s last used
settings and ‘AL’ will be displayed to indicate
that an alarm signal has been sent.
The ‘AL’ can be cancelled by pressing any knob
or button on the front panel.
Connecting to an External Device
24
Alarm
Input
Alarm
Input
ALARM INPUT PLUG WIRING
External Trigger Input
Common (Ground)
Direct logic
input from
alarm device
Alarm Input Example 3
Normally
Closed
Common
Alarm Input Example 2
Normally
Open
RELAY
driven by
external
alarm
Normally
Open
External
Switch
Alarm Input Example 1
Alarm
Input