THOMSON Electrak LL - Control Options Installation and Operation

Thomson
Thomson Electrak
®
LL Actuator - Installation Manual - 2020-1112
4.6.1 General notes
• Avoid placing signal cables along power cables to reduce the risk of interference.
• Avoid using a vehicle earth as the return conductor. Instead use a two wire system to reduce
the risk of interference.
• In very sensitive applications or where there is a risk of interference we recommend using
shielded signal cables.
• Keep in mind that long cables in combination with small lead cross sections and low voltages
may lead to undervoltage and malfunction due to voltage drop.
• Relays or other coil operated devices should have spark protection to avoid interference.
• Never work on the actuator or the wiring with the power switched on!
4.6.2 Speed control by adjusting the input voltage
Electrak LL can not be speed controlled by adjusting the input voltage. When using battery
or full wave rectied direct current that are within the acceptable voltage limits, the built in
Electronic monitoring package will keep the actuator at the correct speed for the load in
question. Outside of the limits the actuator will be stopped (section 4.6.3). When using PWM
(Pulse Width Modulation) to speed control the actuator, the internal PCB will be permanently
damaged and cause malfunction.
4.6 Control options installation and operation