Description
Key Technical Specifications
| Parameter | Specification |
| Part Number | A.F.031.508 |
| Alternate Part Number | A.F. 031.508 / AF031508 |
| Manufacturer | Kollmorgen |
| Product Category | Servo Drive Control PCB Assembly |
| Form Factor | Internal Plug-in Daughtercard / Main Control Board |
| Operating Temperature | 0^\circC to +55^\circC |
| System Compatibility | Kollmorgen Motion Control & Servo Amplifier Chassis |
| Feedback Interface | Resolver / Incremental Encoder Signal Processing |
| Bus Interface | Multi-pin Backplane Interconnect |
| Dimensions & Weight | Standard Drive Footprint; Approx 0.35 kg |
Product Introduction & Supply Chain Strategy
The Kollmorgen A.F.031.508 is an internal main control circuit board engineered for high-performance Kollmorgen industrial servo drives and motion controllers. It executes real-time position, speed, and torque control loops, translating command signals from the master motion controller into precise PWM gate signals for the drive power stage.
Procuring this control board as New Surplus provides an essential lifeline for manufacturing lines operating mature Kollmorgen drive infrastructure. Control boards pulled from active machinery often suffer from micro-cracking in trace vias, degraded electrolytic filter caps, or thermal stress from years of continuous enclosure heat. Sourcing factory-fresh New Surplus stock eliminates unknown component wear, protects against unexpected drive fault shutdowns, and avoids the massive capital expense and programming overhead of complete drive platform retrofits.
Installation & Configuration Guide
Stage 1: Pre-Installation (Prep & Safety)
- Safety & LOTO: Disconnect high-voltage AC mains power from the servo amplifier and observe Lock-Out/Tag-Out (LOTO) protocols.
- Capacitor Discharge Warning: Wait at least 10–15 minutes after powering down to allow internal DC bus capacitors to discharge completely. Verify zero voltage across DC bus terminals with a multimeter.
- ESD Protection: Attach a grounded ESD wrist strap before touching the A.F.031.508 circuit board or internal drive backplanes.
Stage 2: Removal
- Unbolt the drive housing cover to access the internal control card bay.
- Carefully disconnect all ribbon cables and feedback harness plugs, labeling each connector position.
- Remove the PCB retaining screws and slide the old A.F.031.508 board out from the motherboard edge slot.
Stage 3: Installation (Clone & Seat)
- Inspect jumper headers, DIP switch configurations, and pot settings on the old card; replicate every setting position onto the replacement A.F.031.508 board.
- Align the board edges with the chassis mounting guides and slide it firmly into the backplane connector until fully seated.
- Fasten all PCB retaining screws and securely reconnect internal ribbon harnesses.
Stage 4: Power-On & Testing
- Reassemble the drive cover and re-apply control logic power.
- Verify that the drive diagnostic status display initializes cleanly without axis fault, memory error, or feedback trip codes.
- Perform a low-speed manual jog test from the controller interface to confirm smooth motor commutation and stable loop feedback.

A.F.031.508

A.F.031.508
Firmware/Software Versions & Upgrade Notes
- Hardware Hardware-Level Board: The A.F.031.508 acts as the physical processing card for the drive platform; onboard EEPROM or microcode parameters must match host drive firmware revisions.
- Revision Match Requirement: When swapping this board, confirm that all suffix numbers and PCB revision markings on the old board match the replacement unit to prevent parameter table mismatches.
- Parameter Backup: Always export drive parameters (gains, motor maps, feedback settings) to a storage utility or backup file before extracting the existing board.
Frequently Asked Questions (FAQ)
Q: Is this Kollmorgen A.F.031.508 control board brand new?
A: Yes, this item is guaranteed New Surplus / Original New. It has never been installed in an active industrial plant, repaired, or refurbished. It is original, clean factory stock.
Q: Why choose New Surplus over a cheaper refurbished control board?
A: Refurbished circuit boards often carry hidden thermal damage, solder stress, or aging surface-mount capacitors that fail prematurely under heavy industrial vibration. Buying New Surplus ensures 100% component life expectancy, pristine connector contacts, and full operational stability.
Q: Does replacing this card require re-tuning the servo motor?
A: If all DIP switch and jumper positions are mirrored accurately and stored drive parameters are uploaded to the new card, tuning parameters will remain intact. However, running a auto-tune verification cycle is recommended for high-precision axes.
Q: Can I replace this card while the drive unit is powered up?
A: No. Hot-swapping internal drive circuit boards will cause severe electrical arcing, permanently destroy sensitive surface-mount ICs, and create safety hazards. Always isolate mains power and discharge the DC bus first.
Q: What warranty coverage comes with this part?
A: All New Surplus Kollmorgen A.F.031.508 boards are backed by a full 1-year functional replacement warranty starting from the date of shipment.

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