EM-239 is designed for driving two actuators in parallel. The drive is done as synchronized according actuators pulse feedback signal. The synchronization is achieved by adjusting actuator speed during drive. If the adjustment can not compensate the unbalance between actuators, the motors will be stopped. This way the mechanical stress and breakage can be avoided. Additively the driver includes current limit and power stage temperature limit.
Driver works with actuators that can offer pulse feedback signal. Pulses can be derived from Hall-sensors, reed or other kind of switches. Driver can be set to read negative or positive pulses and also there can be selected two or one pulse line/motor mode.
Driver power stage operates with PWM (pulse width modulation), that enables the high efficiency and low losses of power stage.
The basic control is done with FORWARD-, BACKWARD- and STOP-commands. FORWARD and BACKWARD can be done in continuous or in impulse control mode. In continuous mode the drive is done as long the command is on. In impulse mode the command impulses start and stop the driving. For help in assembly and in other special situations, driver has TRIM-inputs for controlling both actuators individually. With these control inputs the user can override most of the limits of normal use and balance the actuators or restore the normal driving position after some unexpected occurrences like equipment failure or user in danger situation. HOME-command input is for driving the system in to its initial position. This driving is done with low speed and in to the end (in to the initial position). The counters are reset to zero. Wide range of parameters can be set to suit to different demands and different applications. In most cases the driver is ready to work with default parameters but some special features and behaviour can be accomplished with further parameter setting. One new feature is SAFETY REVERSE function, which automatically reversing when motors meet obstacle and will be overloaded
The parameters are set with a handy interface unit EM-236. There is also possibility to use EmenTool Lite PC-sofware
with EM-268 and EmenTool App with smartphones for parameter setting.
| TECHNICAL DATA | |
|---|---|
| Supply voltage | 12-35Vdc |
| Quiescent current | 15mA |
| Motor output currents | 2 × 10A cont. or 2 × 20A (at 25% duty) |
| PWM frequency | 2kHz |
| Current limit | 1-25A |
| Temperature limit | 120°C (power stage) |
| Ramp times | 0 - 2s |
| Pulse input frequency max. | 1kHz / input channel |
| Pulse inputs pull-up/down | 10kΩ |
| Control inputs | 0-1V = OFF / 4-30V = ON |
| Input impedances | 10kΩ |
| Fault output | Active, pull-down max. 50mA |
| Auxiliary voltage output | 5V, max. 20mA |
| Dimensions | 78 × 73 × 25mm |
| Operating temperature range | -20 to 60°C |
| Weight | 110g |
| CE Electromagnetic compatibility | EN-55022B, EN 61000-6-2 / -4-2...6 |
