Bipolar Step Motor Driver Operates from +12 to 24 VDC Phase current ranges from 0.35 to 2.0 Amps Peak Selectable Step Resolution from Full, Half, 1/4, and 1/8 microsteps Optically isolated Step, Direction, and Disable/Enable Inputs Selectable Current Reduction of 33% Low Power Dissipation Efficient Current Control Thermal Shutdown, Under-voltage Protection Power-on Indicator Power Disable/Enable Control Sinusoidal current waveform Low Cost Driver
• Bipolar Step Motor Driver
• Operates from 24 to 80 VDC
• Phase current ranges from 1 to 7 Amps and 0.3 to 2 Amps
•10 Microstepping Driver
• Optically isolated Step, Direction, and Disable/Enable Inputs
• Operates from +15 to 48 VDC
• Phase current from 0.3 to 3.0 Amps Peak
• Step Resolutions from Full to 256 microstepping
• Hold current reduction capability with adjustable current and timeout settings
• Three optically isolated control inputs and one optically isolated control output
• Pole Damping™ Technology
POWER SUPPLY 24 OR 48V (100W/150W)
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• Universal Input
• High Efficiency
• Built in PFC Circuit • 3000 V Isolation
• Single Outputs
As a simple 2 Amp driver, the R208 outperforms all of its competitors in its class in maximizing the torque output of a step motor. In the test below you can see that it even outperforms the IMS IM483, a driver that costs over twice as much. Using a standard 1.8° step motor at 8x microstepping, you can see how the R208 outperforms the competition on the torque/speed curve below. The R208 gets over 10% more torque out of the motor at the various speeds compared to the lowest performer.
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Temperature Comparison
The R208 directly competes with the IMS IB462. They are both 2 Amp peak drivers. Both feature full and half step, while the R208 is also capable of 4x and 8x microstepping. Using a standard 1.8° Step motor, 24 VDC, 2 Amps/phase, half-stepping, and 20 revolutions per second, you can see that the R208 runs much cooler than the IB462. After running both for 120 minutes the R208 is at 129° F (53.8° C), while the IB462 is at 138° F (58.8° C). If overall system temperature is important in your application, the R208 has a clear advantage running 9° F (5° C) cooler.
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Click on drawing to zoom in
Pin Number
Color
(#26 AWG Lead)
Function
1
Red
+12 to 24 VDC
2
Black
Step Resolution
3
Brown
Step Resolution
4
Black/White
Disable
5
Orange
Direction
6
Green
Power Ground
7
White
Logic Ground
8
Blue
Opto Supply
9
Yellow
Step
Connectors A DB-9 male connector provides power and control connections. Mating connector provided.
• INPUT VOLTAGE:+12 to 24 VDC (Including Unregulated Power Supplies)
Bipolar Step Motor Driver 
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