Allen-Bradley 1394-SR9A Shunt Module | 1394 Series

Allen-Bradley 1394-SR9A Shunt Module – 1394 Digital AC Multi-Axis Motion Control System

When a high-inertia load decelerates rapidly on a servo drive system, the motor transitions into generator mode, pumping regenerative energy back into the DC bus. Without a properly rated shunt module in place, this excess voltage causes the drive to fault on an overvoltage condition — halting your production line, triggering unplanned downtime, and potentially damaging the drive’s internal power components. In multi-axis coordinated motion applications, a single unprotected axis can cascade faults across the entire system.

The Allen-Bradley 1394-SR9A Shunt Module is the factory-specified dynamic braking solution for the 1394 Digital AC Multi-Axis Motion Control System. Rated for 9-amp continuous shunt current, this module safely dissipates regenerative energy through an internal resistor network, clamping the DC bus voltage within safe operating limits during aggressive deceleration profiles. Within the 1394 product family — which spans from compact 2-axis configurations to large 8-axis coordinated systems — the SR9A occupies the mid-range power tier, making it the most widely deployed shunt option across packaging, assembly, and material handling installations globally.

Technical Specifications

• Part Number: 1394-SR9A
• Manufacturer: Allen-Bradley / Rockwell Automation
• Product Series: 1394 Digital AC Multi-Axis Motion Control System
• Module Type: Shunt (Dynamic Braking) Module
• Continuous Shunt Current: 9 A
• Function: Regenerative energy dissipation / DC bus overvoltage protection
• Weight: 2.7 kg
• Compatibility: 1394 Series System Interface Modules (SIM) and Axis Modules
• SKU / Catalog Number: 1394-SR9A

Key Features & Benefits

• DC Bus Overvoltage Protection: Clamps regenerative voltage spikes during motor deceleration, preventing drive faults and protecting power electronics.
• 9 A Continuous Rating: Handles sustained braking duty cycles in demanding multi-axis coordinated motion applications without thermal derating.
• Factory-Specified Design: Engineered specifically for the 1394 architecture — no field modifications or external resistor sizing required.
• Plug-In Module Form Factor: Installs directly into the 1394 system chassis, maintaining the system’s compact panel footprint.
• Reduced Downtime Risk: Eliminates overvoltage faults that would otherwise halt production and require manual drive reset procedures.
• Long Service Life: Industrial-grade resistor network rated for high-cycle braking duty, consistent with Rockwell Automation’s reliability standards.

Industry & Equipment Applications

• Packaging Machinery: High-speed pick-and-place, form-fill-seal, and cartoning lines with frequent start-stop cycles.
• Automotive Assembly: Coordinated servo systems on welding fixtures, transfer lines, and robotic work cells.
• Material Handling: Conveyor indexing, palletizing, and sortation systems with variable load inertia.
• Printing & Converting: Web tension control and register servo axes requiring precise deceleration.
• Semiconductor & Electronics Manufacturing: Precision motion stages where smooth, fault-free deceleration is critical to yield.
• Food & Beverage Processing: Hygienic packaging lines with washdown-adjacent servo drives requiring reliable braking.

System Integration & Compatible Parts

The 1394-SR9A is designed to integrate within the broader Allen-Bradley 1394 ecosystem. Compatible and commonly paired components include:

• 1394-SJT05-A / -C / -T: 1394 System Interface Modules (various power ratings)
• 1394-AM03 / AM05 / AM07: 1394 Axis Modules for individual servo axes
• 1394-SR3A: Lower-rated 3 A shunt module for lighter-duty applications
• 1394-SR18A: Higher-rated 18 A shunt module for heavy regenerative loads
• 1394-L23: 1394 GMC (General Motion Controller) system controller
• 2090-Series Servo Cables: Motor feedback and power cables for 1394 axis modules

When replacing or upgrading shunt modules, always verify the total regenerative power budget across all axes against the shunt module’s continuous and peak ratings per Rockwell Automation publication 1394-UM001.

Our Quality Assurance Process

At Konmask.com, every Allen-Bradley 1394-SR9A unit we supply undergoes a structured verification process before shipment:

• Authenticity Verification: Visual inspection of Rockwell Automation labeling, date codes, and catalog number markings against known-good references.
• Physical Condition Inspection: Examination of connector pins, module housing, and resistor assembly for damage, corrosion, or evidence of prior field failure.
• Documentation: Each unit is accompanied by a condition report and traceability record.
• Secure Packaging: Anti-static packaging with foam cushioning to prevent transit damage to sensitive power components.

We source from verified industrial surplus channels and authorized distribution networks, prioritizing units with documented storage history.

How to Order

1. Submit an Inquiry: Use the contact form on this page or email support@konmask.com with your required quantity and delivery timeline.
2. Receive a Quote: Our team will respond within 1 business day with pricing, availability, and lead time.
3. Confirm & Pay: Approve the proforma invoice and complete payment via T/T bank transfer or other agreed method.
4. Shipment & Tracking: We ship via DHL, FedEx, or UPS Express with full tracking. Export documentation provided for international orders.
5. After-Sales Support: Our technical team remains available post-delivery for installation guidance and compatibility questions.

Why Choose Konmask.com?

• Industrial Automation Specialists: We focus exclusively on PLC, DCS, servo, and motion control components — not a generalist distributor.
• Global Sourcing Network: Access to hard-to-find and discontinued Allen-Bradley parts through verified surplus and distribution channels worldwide.
• Technical Expertise: Our team understands 1394 system architecture and can advise on compatibility, replacement, and system integration.
• Fast Response: Inquiries answered within 1 business day. Urgent requirements accommodated.
• Secure International Shipping: Experienced in export compliance, customs documentation, and safe packaging for sensitive industrial electronics.
• Trusted by Engineers Globally: Serving maintenance engineers, OEM integrators, and procurement teams across Asia, Europe, and the Americas.

Frequently Asked Questions

Q: What is the difference between the 1394-SR9A and the 1394-SR3A or 1394-SR18A?

A: The SR suffix denotes the shunt resistor module, and the number indicates the continuous shunt current rating in amps. The SR3A (3 A) suits lighter regenerative loads on smaller axis configurations, the SR9A (9 A) covers mid-range multi-axis systems, and the SR18A (18 A) is specified for high-inertia or high-duty-cycle applications. Selection should be based on the total calculated regenerative power across all axes per the 1394 system design guide.

Q: Can the 1394-SR9A be used with other Allen-Bradley drive families such as PowerFlex or Kinetix?

A: No. The 1394-SR9A is designed exclusively for the 1394 Digital AC Multi-Axis Motion Control System chassis. It is not compatible with PowerFlex, Kinetix 5500/5700, or other drive families, which use different braking architectures and connector interfaces.

Q: Is this a new or refurbished unit?

A: Stock condition varies. Please contact us with your requirement and we will confirm the exact condition, source, and any available documentation for the units currently in stock.

Q: What is the lead time for the 1394-SR9A?

A: Lead time depends on current stock levels. In-stock units typically ship within 2–3 business days of payment confirmation. For out-of-stock situations, our sourcing team will provide an estimated lead time at the time of inquiry.

Q: Do you provide a warranty?

A: Yes. We offer a standard warranty period on all units supplied. Warranty terms are confirmed in the sales agreement. Our after-sales team supports any DOA (dead-on-arrival) claims with prompt replacement or refund procedures.

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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691

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