CCU-S Load Limiter For Platform Device

1 - General description

The CCU-S is an integrated control unit, which has the function of different devices necessary to control an aerial platform installed on a vehicle. A circuit board with twin microprocessor inside the control board, allows to realise the advanced control of the machine, offering the following functions in a unique device:

- DUMP VALVE INTERFACE

- WORKING AREA LIMITATION

- LOAD LIMITER - OUTRIGGERS CONTROL

- ROTATION CONTROL

2 - Main features

-Check of the machine outriggers by redounded micro switches.

-Check of the platform column rotation through reading of a CAN encoder.

-Double differential pressure reading of the jack on the main boom.

-Double reading of the angle of inclination of the main boom. -Moment block with intervention limit that is set dynamically depending on the angle of rotation of the column and the status of the outriggers.

-Advanced diagnostics system for displaying machine status.

-Automotive 56 pole FCI connector, protection rating IP 68.

-Safety outputs in category 3 (EN 13849) for: dump valve driving; main boom extension and down movement valve driving; rotation block and slowing output. -Communication via CAN BUS (CAN 2.0B).

-Libraries for interfacing with CanOpen Safety encoder (DS-304).

3 - Dump valve interface

Dump valve is an oil discharge valve (NO type), by which all machine movement can be locked. Dump valve interface is an integrated module. It drives the main "DUMP VALVE": a dedicated power output supplies the dump valve when the safety conditions, for machine operation, are present. When the control unit detects a lack of safety condition, the dump valve is unpowered. Two safety relays in series to the emergency button circuit guarantee the safety level of the dump valve interface. Each safety relays is driven and checked by his own dedicated microprocessor.