Description
Product Core Brief
- Model: DEIF FAS-113DG
- Brand: DEIF
- Series: AGC (Automatic Generator Control)
- Core Function: Regulates generator frequency and enables load sharing during parallel operation.
- Product Type: Frequency Controller / Load Sharing Module
- Key Specs: 50/60Hz Auto-Detect | PID Droop Control | RS485 Comms
- Condition: New Original / New Surplus

DEIF FAS-113DG
Product Introduction
DEIF acts as the primary frequency regulator for parallel generator systems. This controller continuously monitors grid or bus frequency and adjusts engine speed to maintain stability.
The replacement module features high-precision PID control for tight frequency regulation. It supports automatic load sharing across multiple units without external droop resistors.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Frequency Range | 45Hz – 66Hz |
| Nominal Voltage | 24V DC |
| Control Type | PID with Adjustable Droop |
| Communication | RS485 (Modbus RTU) |
| Operating Temp | -25°C to +70°C |
| Protection Rating | IP20 (Front Panel IP54) |
| Dimensions | 96 x 96 x 110 mm |
| Mounting | Panel Cutout |
| Input Signals | Frequency, Voltage, Current |
| Output Signals | Actuator Drive (PWM/Voltage) |
Quality Control Process
Every power control unit undergoes functional validation. We start with a visual inspection of terminals and conformal coating. Next, we simulate frequency inputs to verify PID response and actuator output linearity. Load sharing logic is tested using a dual-generator simulator. RS485 communication is verified with a protocol analyzer. Finally, the industrial automation unit is sealed in anti-static packaging.
Replacement Pitfall Guide
❗ Verify Actuator Type: Ensure the output matches your engine governor (PWM vs. DC Voltage). Wrong output fries the actuator.
❗ Check Droop Settings: The new module ships with factory defaults. You MUST configure droop % to match existing units.
❗ Grounding is Critical: Connect the shielded cable drain wire to the controller ground terminal only. Ground loops cause frequency hunting.
❗ Don’t Skip Calibration: After installation, run the auto-calibration routine. Skipping this leads to poor load sharing.
Keep these in mind and you’ll cut 90% of rework time.

DEIF FAS-113DG
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| AGC 150 | Needs Adaptation | Requires new wiring harness and parameter reconfiguration | |
| -R | Direct | Drop-in replacement with updated firmware |
- Benchmark: Frequency regulation accuracy typically ±0.25% under full load step.
- Benchmark: Load sharing response time < 2 seconds for 25% load change.


