GENERAL EM-A24
EM-A24 is a DC-motor driver module, It's based on EM-241 driver card. This module is PCB mountable and it needs a very small pcb area, because it will be installed vertically. This module has effective H-bridge power stage. The power stage has low EMC emission and it can meet EMC directives for industry and household enviroments without external components. This is big benefit when integrated this module to the "motherboard". Module has two pwm frequency option 2kHz offer more current, and 16kHz is noiseless.

FIRMWARE EM-A24-SAF
EM-A24-SPF firmware is designed for positioning use with motor or actuator with pulse sensors. Feedback can be analog signal. There basic range for feedback is 0-5.5V . Analog signal source can be for example
potentiometer or sensor with analog output.
The positioning set signal can be used an analog control signal 0-5,5V. Input is freely scalable inside the range. The max. electrical accuracy of the driver and feedback is 0.2% which is adequate for most actuator positioning applications.
The driver includes many other dynamic adjustment features like parameter for load compensation, dead-zone setting (positioning window), start and stop ramps for smooth direction change and braking zone for well operating positioning. The settings and adjustments are done with parameters as in all new generation Electromen products. Included in the parameters is also the learn routine which will help to determine the full movement range fast and easily. Additively the movement range can be modified from both ends with SW-limit parameters. Possible cumulating pulse count errors can be avoided with manually or automatically triggerable home drive. Current limits and driving speeds can be set individually for both directions.
The parameter setting and status monitoring is done with EM-236 or EM-328 Interface Units. The right parameters can also be copied easily to other driver units. The on-board LED-light indicates the possible fault situations with blinking codes. The fault alarm can be also given out FAULT port (pin.17). Disable input (pin 18 or 12 ) will be stop action of card as long this command occurs. Analog position output signal ( pin 14 ). can be used for position incation.

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TECHNICAL DATA
Supply voltage cont. max. 10-35V
Overvoltage limit adjustable 15-40V ( connect motor to freewheel )
Overvoltage dynamic brake 40V ( shorting motor poles )
Start up voltage 9V, shutdown voltage 8V
Continuous current output when ambient temp. is < 50°C
12A at 100% speed / 7A at 5-99% speed ( pwm freq. 2kHz )
8A at 100%speed / 4A at 5-99% speed ( pwm freg 16kHz )
Peak current ( 5s. ) 25A at 2kHz / 15A at 16khz
Current limit adjustable 0.1-25A ( at start max. 30A )
Overheat limit 100°C
Start and stop ramp adjustable 0-5s
PWM frequency 2kHz / 16kHz ( selectable )
Position set input scale. max. 0-5.5V
Feedback input scale 0-5.5V
Input control logic: high =4-30V, low=0-1V
Control input impedances typ. 100kohm
limit input impedance. typ. 10kohm.
Control input response time typ 5ms.
Fault out. NPN open coll. max 30V / 50mA
Fault in actives Uin < 1V ( NPN )
Dimensions as is drawing above
CE-tested for industrial environment ( emc )
Operating temp ( Ta ) -40...60°C
Weight 15g

Tiedostot

• EN_em-A24-SAF.pdf - Lataa tiedosto (63 kt)

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