Parker 690+0125/460/CNS | Repair & Stock

Parker 690+0125/460/CNS | 125 HP 460V VFD

The Parker 690+0125/460/CNS is a powerful 125 HP variable frequency drive in chassis format, equipped with an integrated braking switch and a system control board. It’s built to handle demanding automation environments where advanced I/O and deceleration capabilities are essential.

• Power Rating: 125 HP (Frame F)
• Input Voltage: 460V AC ±10%
• Enclosure: Chassis (IP20)
• Brake Option: Braking switch installed (B)
• System Board: System board included (S)

Use Case for CNS Configuration

With both a brake switch and a system board, this model supports more complex control topologies and fieldbus communication, making it a smart pick for high-inertia or multi-motor installations where coordinated braking and logic are required.

Frequent Issues Flexa Systems Can Resolve

• 🔧 Overvoltage Trips – Usually from aggressive deceleration or missing brake resistors.
• 🔧 Input Undervoltage – Caused by power dips, faulty wiring, or incomplete supply.
• 🔧 Overcurrent Faults – Often due to heavy motor loading or incorrect boost parameters.
• 🔧 Excessive Heatsink Temp – Inadequate ventilation or ambient overheating.
• 🔧 Motor Not Turning – Load torque exceeds limits or settings restrict rotation.
• 🔧 Brake Resistor Trips – When too much braking energy is dumped too quickly.
• 🔧 Brake Switch Overload – Sign of repetitive high-inertia stopping or misconfigurations.
• 🔧 Lost COMMS – Timeout settings or cabling issues in the system board communication line.
• 🔧 STO Circuit Problems – A faulty Safe Torque Off board can shut down the system.
• 🔧 Controller ↔ Power Section Errors – Caused by firmware issues or board faults.
• 🔧 Speed Feedback Problems – Encoder or tach feedback out of range or fluctuating.
• 🔧 Current Limiting Events – Surging current during acceleration or torque boost use.
• 🔧 24V Output Drop – External short or overloaded accessory drawing too much power.
• 🔧 Phase Imbalance – When one or more phases are missing or miswired.
• 🔧 DESAT Trip – Fast current spike through the IGBT module, often a repairable power fault.
• 🔧 Ripple Alarm – From poor filtering or missing supply phases.
• 🔧 Brake Overcurrent – Possible short circuit in the brake loop wiring.
• 🔧 Overspeed Warnings – May involve encoder noise or parameter mismatches.
• 🔧 Analog Input Fault – Bad scaling, wrong mode (e.g. 4-20 mA), or signal shorts.
• 🔧 Boost Overdraw at Low Speed – Common with oversized loads and aggressive tuning.
• 🔧 Motor Temperature Faults – May be due to blocked cooling or thermistor wiring issues.

Repair and Replacement from Flexa Systems

Flexa Systems is ready to repair or supply the 690+0125/460/CNS model quickly and reliably. Our services go beyond diagnostics — we handle full rebuilds, firmware tuning, and board-level repairs, ensuring you’re back online with minimal delay. We also stock units for direct exchange or sale when needed.

Important Notes

• This listing applies to the 690+0125/460/CNS part number specifically.
• Pricing depends on condition, inventory, and optional enhancements.
• We ship nationwide from our Texas facility — fast service to all 50 U.S. states.