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Allen-Bradley 1394-SR9A External passive shunt module

Allen-Bradley 1394-SR9A External passive shunt module

ALLEN-BRADLEY
BULLETIN 1394
SR9A
SHUNT RESISTOR
 
EXTERNAL REGENERATIVE POWER DISSIPATION
POWER RATINGS
CONTINUOUS POWER 300 W
RESISTANCE 4 Ω
DRIVE CLASS 200 V AC class
Verify system requirements before selecting a replacement.
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Miya zheng · AMIKON
 
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ALLEN-BRADLEY / 1394-SR9A PRODUCTSPECSSYSTEMFAQQUOTE
REGENERATIVE ENERGY RELEASE
4 OHM
300 W
PASSIVE
AMIKON SUPPLY AND SERVICE

ALLEN-BRADLEY
1394-SR9A

1394-SR9A is an externally mounted passive shunt module that dissipates regenerative DC-bus energy as heat when a compatible servo drive requires more braking capacity than its internal shunt can provide.

01 / ALLEN-BRADLEY
Product Identification
Manufacturer Allen-Bradley
Catalog number 1394-SR9A
Product type External passive shunt module
Electrical role Regenerative energy dissipation
Resistance 4 ohm
Cooling type Natural convection
02 / ALLEN-BRADLEY
Functional Overview
The servo drive activates its shunt transistor when DC-bus voltage rises during deceleration. Current then passes through the 1394-SR9A resistor, converting excess regenerative energy into heat and reducing nuisance overvoltage trips.
03 / ALLEN-BRADLEY
Technical Specifications
Resistance 4 ohm
Continuous power 300 W
200 V-class peak power 41.0 kW
200 V-class peak current 101.25 A
400 V-class peak power 160 kW
400 V-class peak current 200 A
Approximate weight 3.63 kg / 8 lb
Overall envelope Approx. 280 x 150 x 175 mm
Mounting hardware M6 or 1/4-20
04 / ALLEN-BRADLEY
System Architecture
SERVO MOTOR / LOAD → REGENERATIVE DC BUS → DRIVE SHUNT TRANSISTOR → 1394-SR9A RESISTOR → HEAT TO AMBIENT
05 / ALLEN-BRADLEY
Compatibility & Related Models
MODEL ROLE SELECTION POINT
1394-SR9A 300 W continuous This natural-convection model
1394-SR9AF 900 W continuous Fan-cooled 9 A-frame variant
1394-SR36A 1800 W continuous Higher continuous dissipation
1394-SR36AF 3600 W continuous Fan-cooled high-duty variant
2094-BSP2 Kinetix shunt module interface Used where the drive architecture requires it
06 / ALLEN-BRADLEY
Installation Considerations
01
Mount vertically on a rigid metal surface with the required clearances for heat dissipation.
02
Keep combustible material, signal wiring and heat-sensitive devices away from the enclosure.
03
Match voltage class, shunt control arrangement, fuse and conductor size to the installed drive.
04
After wiring, confirm protective earth, terminal torque, unobstructed airflow and braking-cycle performance.
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07 / ALLEN-BRADLEY
Engineering FAQ
1394-SR9A: Is 1394-SR9A an active braking controller?
No. It is a passive resistor assembly and depends on the servo drive shunt transistor for activation.
1394-SR9A: Can 1394-SR9A be selected only by motor power?
No. Selection depends on regenerated energy, duty cycle, bus voltage, deceleration profile and drive compatibility.
1394-SR9A: Can 1394-SR9A and 1394-SR9AF be exchanged without review?
No. Their cooling and continuous dissipation ratings differ, so thermal and mounting conditions must be recalculated.
1394-SR9A: What must be checked before ordering 1394-SR9A?
Confirm catalog number, drive family, voltage class, duty cycle, mounting space and fuse requirement.
1394-SR9A: Why is clearance important around 1394-SR9A?
The resistor becomes hot while absorbing regenerative energy; inadequate clearance can cause overheating and damage nearby equipment.
08 / ALLEN-BRADLEY
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Price, Availability and Exact-Match Support
Contact us within 7 days if an issue is found after receipt. Returns must remain in original condition and include the reason for return. Return freight is arranged by the buyer; replacement or refund review follows receipt and inspection.
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