Description
Product Introduction & Engineering Value
When an older motion-control machine suddenly loses communication with its servo network, the failure point is often not the motor or amplifier itself but the communication interface between controller and drive. The Kollmorgen A.F.031.5/08 restores the SERCOS communication path used by SERVOSTAR 600 systems in precision automation equipment.
This interface board is commonly maintained as a spare for legacy CNC, robotics, and machine-tool platforms where replacing the entire motion architecture is not practical. Correct installation requires matching firmware level, drive configuration, and SERCOS network parameters.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Kollmorgen / Seidel |
| Part Number | A.F.031.5/08 |
| Product Type | SERCOS Interface Board |
| Drive Family | SERVOSTAR 600 |
| Communication Interface | SERCOS fiber-optic communication |
| Board Function | Motion controller communication interface |
| Diagnostic Features | LED indicators |
| Installation Type | Internal servo drive expansion board |
| Application Category | PLC / Machine Motion Control |
| Firmware Reference | Depends on board version |
| Replacement Method | Hardware matching required |
| Availability | New Surplus / Refurbished / Tested Used |
Field Application & The “Trench” Experience
A packaging machine running multiple servo axes begins stopping intermittently during high-speed synchronization cycles. The PLC diagnostics show a communication fault between the motion controller and the SERVOSTAR 600 drives.
The maintenance team initially checks cables, fiber connections, and drive parameters. After confirming the network hardware, they identify the SERCOS interface board as the failure point. The installed module is removed, the replacement Kollmorgen A.F.031.5/08 is verified against the original hardware markings, and the machine is restarted after restoring communication settings.
The key lesson from experienced motion engineers: a communication board failure can look like a motor or drive failure. Proper fault isolation prevents unnecessary replacement of expensive motion hardware.
Specific application scenarios
- CNC machining centers — coordinating multiple servo axes through SERCOS motion networks.
- Robotic assembly cells — maintaining synchronized servo communication between controller and drives.
- High-speed packaging equipment — supporting precise axis coordination and repeatable motion sequences.

A.F.031.5/08

A.F.031.5/08
Transparency SOP: QA & Testing
For New Surplus or Refurbished A.F.031.5/08 inventory, inspection should focus on communication reliability and board condition.
Quality verification process:
- Identification check
- Confirm part number: A.F.031.5/08.
- Verify Kollmorgen / Seidel markings.
- Record firmware or revision information.
- Visual inspection
- Check PCB surface condition.
- Inspect connectors and fiber interfaces.
- Examine LED indicators.
- Electrical testing
- Verify onboard power circuits.
- Check for component damage.
- Inspect solder joints and connectors.
- Communication testing
- Install in a compatible SERVOSTAR 600 environment.
- Confirm SERCOS communication startup.
- Verify diagnostic status.
- Final documentation
- Photograph labels.
- Record serial information.
- Package with ESD protection.
Available industrial automation listings identify this part as a discontinued Kollmorgen/Seidel SERCOS interface board for SERVOSTAR 600 drives, with refurbished and unused inventory channels available.
The Veteran’s Tech Trap Guide
⚠️ Trap #1 — Assuming any SERCOS card will work
SERCOS describes a communication standard, not a universal plug-in module. Different drive families may require different interface hardware.
PRO TIP: Match the complete drive model, board revision, and firmware compatibility before installation.
⚠️ Trap #2 — Forgetting network parameter recovery
Replacing the communication board may restore hardware communication but does not automatically restore:
- Node addressing
- SERCOS ring settings
- Drive parameter files
- Axis configuration
Save the original motion configuration before removing the failed board.
⚠️ Trap #3 — Ignoring fiber connection condition
SERCOS systems depend on reliable optical communication. Dirty connectors, damaged fiber ends, or incorrect ring wiring can create symptoms that appear to be a failed interface board.
Dynamic FAQ
Q1: What is Kollmorgen A.F.031.5/08?
The Kollmorgen Seidel A.F.031.5/08 is a SERCOS interface board designed for SERVOSTAR 600 servo drive systems.
Q2: What does this board do in a servo system?
It provides the communication interface between the higher-level motion controller and the servo drive, allowing coordinated axis control through the SERCOS network.
Q3: Which equipment uses A.F.031.5/08?
It is associated with Kollmorgen/Seidel SERVOSTAR 600 drive systems used in industrial motion applications.
Q4: Can I replace A.F.031.5/08 with another Kollmorgen interface board?
Not automatically. Confirm:
- SERVOSTAR drive model
- Board revision
- Firmware version
- SERCOS configuration
- Machine controller compatibility
Q5: Is New Surplus A.F.031.5/08 unused?
New Surplus generally refers to unused inventory from previous stock holdings. Confirm actual photos, packaging condition, storage history, and testing records before purchase.
Q6: What warranty is available for this module?
Warranty depends on supplier and inventory condition. Refurbished units may include functional testing and limited warranty coverage, while New Surplus units depend on seller terms. Confirm warranty details before ordering.




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