Expert Electronics MB1, Руководство пользователя

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MB1 User Manual
© 2016 Expert Electronics
CONNECTIONS
2.5.4 External Control devices
The MB1 transceiver allows you to control external devices via seven built-in electronic keys
through the EXT CTRL connector.
The picture below shows the connection schematics between the relay and the pins of the EXT
CTRL connector. With the help of the keys you can have direct control of antennas, external
band filters, external PA's bands, HF preamplifiers, external transverter PTT etc.
Commutation is dependent on the band and RX/TX mode.
Adjusting of the keys' triggers can be made in the software Settings (more details in EXT CTRL
Configuration ).
The X7 terminal can be configured as thermostat for enabling of the external fan. The
transceiver measures the internal temperature and enables or disables external fan, depending
on the settings (adjusted by the User). The Fan can be used for additional ventilation of the
transceiver. You could also connect a relay to this terminal to control the room cooling system or
other systems, dependent on the transceiver's temperature.
Note:
( The Electronic keys have built-in protection diodes for inductive loads (relays, fans, solenoids,
etc.) with a maximum reverse voltage of 75 V and current up to 200 mA (diodes 1N4148). If
your inductive load gives a higher reverse current, it is necessary to use an external diode,
which is situated parallel to the connected load. See diagram below.
(
The X8 terminal is designed for control of the external PA.
( The total load on the power output + 12V (Conn. 14) of the EXT CTRL connector must be
less than 1 A.
(
There is a protective fuse for current of 1 A installed on the SDR board, inside the transceiver.
( There is a diode connected in series with the power output + 12 V (Conn. 14) to avoid an
outside voltage supply reaching inside the transceiver.
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