.. 15. PROGRAMMABLE DRIVERS LME 12 LME 12 - Two-actuators programmable driver The synchronization of two actuators is extremely important in those applications requiring the movement of covers, traps or hoods. A non-synchronized movement of the actuators would cause loads and/or deformations on the units. LME 12 driver integrates both control and activation functions allowing the implementation of dedicated software solutions depending on application requirements. LME 12 is a programmable driver for synchronizing two linear actuators with DC motors. LME 12 is a single board which integrates two LME 12 driver units. Each actuator is provided with a microprocessor with its relevant parameters set. Based on the preset parameter values, LME 12 calculates the time related position of the actuator push rod. Startup, it makes the two actuators move simultaneously and, based on to the feedback signals, it monitors the current position of both push rods. The system will stop automatically and an error signal will appear in the following two cases: ■ the difference between the real position of any of the two push rods and the corresponding calculated position is higher than preset value; ■ the difference of the real position between the two push rods is higher than another preset value. Two drivers LME 12 can be connected into a 4-axis system. Working modes: see chapter about LME 11. Axis 1 actuator Axis 2 actuator FC (La) TT POWER SUPPLY TT FC (La) DRIVE AND CONTROL UNIT LME 12 FC (Lc) M. JL FC (Lc) ffljii Inputs motor 1 Transdibcer rrarSsducer | DC motor - 78 -

'Linear-Mech,j 15. PROGRAMMABLE DRIVERS Technical features - LME 11 and LME 12 TECHNICAL FEATURES ■ Rated input voltage: 24 V dc or 12 V dc ■ Input voltage limits: (10 ...30) V dc ■ Automatic shut-off in case of input voltage lower than preset value (important when the driver is powered by battery) ■ Protected against input polarity inversion ■ Max input current:10 A ■ Automatic shut-off in case a preset temperature value is reached (over-heating protection) ■ Emergency input ■ Movement enabling input ■ 3 positioning drive inputs ■ Analogic input (V or mA) ■ Encoder input (max. frequency 1 kHz)...