Service Manual
DS 350 Modular
© PAT
Rev. - 12/18/00 // CSH.
190118_-.DOC
2
3 SYSTEM
DESCRIPTION
The PAT Load Moment Indicator DS 350 consists of a central microprocessor unit, operating console, angle
sensor, force transducer, and anti-two block switches.
The system operates on the principle of reference/real comparison. The real value, resulting from the load
measurement is compared with the reference data, stored in the central processor memory and evaluated in the
microprocessor. When limits are reached, an overload warning signal is generated at the operator’s console. At
the same time, the aggravating crane movements, such as hoist up and boom down, will be stopped.
The fixed data regarding the crane, such as capacity charts, boom weights, centers of gravity and dimensions are
stored in memory chips in the central processor unit. This data is the reference information used to calculate the
operating conditions.
The boom angle is measured by the angle sensor, mounted in the boom base. The cable reel cable serves as an
electrical conductor for the anti two-block switches and force transducer signals.
The load on the boom is measured by force transducer mounted on top of the boom, close to the tip.
The interactive user guidance considerably simplifies the input of operating modes as well as the setting of
geometry limit values. Please refer to the PAT DS350 operator’s manual for the operation of the system.
The System consists of the following main components:
1. Central
Unit
2. Cable for crane power
3. Cable to cable reel
4. Cable
Reel
5. Junction
box
6. A2B switch with weight
7. A2B bypass plug
8. Cable to force transducer
9. Force
transducer
10. Cable to main boom angle sensor
11. Main boom angle sensor
12. Operator’s console with cable assembly
13. Cable for area definition sensor
14. Area definition sensor
Fig. 1:
Components of the LMI system PAT DS 350/Modular
