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SCA-B4-70 Drives
CompletePower™ Series

Summary Details

Technology: Brushless Servo
Quadrants: 4
Nominal Current: 10A or 30A

For Brushless Motors. Up to 2100 W.
This four-quadrant brushless DC servo amplifier is fully enclosed in a rugged aluminum case which can be panel mounted or DIN-rail mounted for easy integration. The drive can be configured in a variety of torque and speed control modes with the mode of operation being set by simple jumpers. Both the 10 A and 30 A versions of this drive have an adjustable current limit and can be powered by the same 11 - 70 VDC range of supply voltage. The drive is protected against over-current and over-temperature and motor short-circuit and incorporates state of the art MOSFET technology for maximum efficiency. Connectivity is achieved with simple screw-terminals for control/feedback inputs, supply power and motor connections.

Additional Product Details

SCA-B4-70 Technical Drawings


SCA-B4-70 Specifications

Model Numbers Power Supply Voltage
Aux Voltage
Continuous Current
Peak Current
Max Power
Frequency of
Power Output Stage
SCA-B4-70-10 11 - 70 5 - 24 10 20 700 with heatsink 49 95
SCA-B4-70-30 11 - 70 5 - 24 30 60 2100 with heatsink 49 95

Control Inputs
Set Value -10 to +10 VDC
Encoder input signals channel A,B / TTL / max 100 kHz
Enable 8 to 30
Auxillary Voltage Sources 5V/100mA
Auxillary Voltage Sources 15 VDC/20mA
Monitor I 0.25V/.16A
Monitor n 10VDC/nmax
Error open collector max 30VDC
LEDs green = ok / red = fault
Function of Potentiometers gain course / gain fine / nmax
Mechanical Specs
Dimensions (L x W x H) inches / (mm) SCA-B4-70-10: 7.09 x 3.94 x 1.57 / (180) x (100) x (40)
SCA-B4-70-30: 7.87 x 3.94 x 3.15 / (200) x (100) x (80)
Mounting Hole Distance (mm) 120 X 90
Weight in ounces / (grams) SCA-B4-70-10: 20.46 (580)
SCA-B4-70-30: 40.56 (1150)
Operating Temperature (°C) -10 to +45
Storage Temperature (°C) -40 to +85
Humidity Range Not Condensing (% rH) 20% to 80% Relative, Non-condensing
Operation Mode
Operation Mode speed-control by hall
speed-control by encoder
torque control

SCA-B4-70 Accessories

Photo Model Number Description User Manual Technical Drawing
$photo ASO-BM-70-30 Breaking module in a rugged aluminum case. Consult Factory Download PDF
$photo IA310x Choke module optimized for brushless drives.
Inductance: IA3100 = 3x50uH; IA3101 = 3x100uH
Nominal current: 10A
Consult Factory Download PDF
$photo ASX-RM-01-01 Aluminum DIN Rail Mounting Kit with L-shaped bracket for units:
- SCA-Lx
- SCA-Sx
- SCA-B4-70-10
- not used for SCA-SS-70-30
Consult Factory Download PDF

SCA-B4-70 User Manuals

Model Number User Manual
SCA - B4 - 70 - 10 Download PDF (Drive User Manual)
SCA - B4 - 70 - 30 Download PDF (Drive User Manual)

ElectroCraft Rapid Delivery Program

Some versions of this product are available via ElectroCraft's Rapid Delivery Program. Lead times for these products are given in working days and stated below. Please note, these lead times may be exceeded during holiday periods or due to unforeseen circumstances. Always contact your local ElectroCraft representative for confirmation of availability.

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Part Number Description Typical Lead Time
SCA-B4-70-10 4-Quadrant Brushless Motor Drive, +/- 10V Analog, 11-70VDC, 10A Nominal Current, 700w Max. 2 days


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