SYNTHESIZED SETS
USER MANUAL
14
3.2. RECEIVER
The receiver unit consists of a cabinet in which the various electronic systems are located to receive
orders and activate / deactivate the corresponding relays for each manoeuvre of the crane.
The receiver unit can be divided into three blocks (Fig. 3.13, UHF receiver, control circuit and relay
circuit.
In GCFI versions, the block diagram is as follows,
Fig.3.13 Block Diagram of the receiver
The signal received by the antenna is injected to the receiver, which supplies a low frequency signal
in FFSK code to the micro-processor. The control module checks that the information received is free
of errors, and then draws up the corresponding orders to activate the corresponding relay.
In GFCI equipments, the transmitter becomes a transceiver. This enables a bi-directional
communication with the receiver.
In the event of anomalies in the working order of hardware or software, there are specific circuits in
the control circuit, which deactivate the radio control work manoeuvres.
For greater safety, all surveillance circuits are doubled.
RECEIVER
UHF
CONTROL
CIRCUIT
RELAYS
TO MANOUVRE
CONTACTORS
TRANSCEIVER
CONTROL
CIRCUIT
RELAYS
TO MANOUVRE
CONTACTORS
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