System Description; Infrared Sensor - IKUSI TM70 Serie Manual De Instalación Y De Utilización

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11.1.1 - SYSTEM DESCRIPTION

TM70 radio remote control systems can be equipped with a range limitation option for overhead
cranes, through which, the system is able to determine if the transmitter is located outside of a zone,
defined as a working area, and deactivates the controls when these situations arise.
The system consists of one or more Infrared transmitters LA70, installed either in fixed positions or on
the controlled crane, oriented in such a way that it covers the targeted working zone. In these cases
the transmitters of the remote control sets are equipped with a sensor which receives the information
coming from the LA70 transmitter. This information is analysed by transmitter microprocessor, which,
in this way knows when the operator has left the working area. Consequently, outputs are deactivated.
Application examples:

11.1.2 - INFRARED SENSOR

As explained in the above, the
function is to receive the infrared information coming from the LA70 transmitter. The location of this
sensor is the following:
The transmitter microprocessor receives the information from the sensor and checks the identity of the
crane. As soon as the sensor stops receiving the signal coming from the crane, the transmitter LED,
which was green, begins to flash in red, (in case of belly box transmitters, a buzzer also sounds), in
order to let the operator know that he has moved too far away. If this situation lasts longer than 4
seconds, all the active commands are cancelled, although communication is maintained with the
receiver. In this way the main contactor and the selection orders are maintained.
In order to return to the operating mode, all the worker has to do is move back into the working zone.
Movement orders must be disabled in order to restart movement. Once the transmitter enters the
working area, movement orders will not be ready to be used unless they have gone to zero. This is to
TM70Bi V4.1 (03/12)
1121174.pdf
IKUSI reserves the right to modify this information without prior notification.
LA70
sensor
element is located in the remote control transmitter and its
34

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T70/1T70/2

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