Controllers & I/O Card Repair
Process controllers and I/O cards translate the physical world — sensors, switches, actuators — into signals your control system can understand. When they fail intermittently, troubleshooting is hard. Our engineers replicate field conditions in the workshop to find and fix failures permanently.
What We Repair
Process Controllers
- ▶Standalone PID and process controllers
- ▶Multi-loop and multi-zone controllers
- ▶Batch and recipe controllers
- ▶Packaging line controllers
I/O Cards
- ▶Digital input and output cards (24V DC, 230V AC)
- ▶Analog input cards (4–20 mA, 0–10 V, thermocouple, RTD)
- ▶Analog output cards
- ▶High-speed counter and pulse cards
- ▶Communication cards — Profibus, Modbus, Ethernet/IP
Distributed I/O
- ▶Remote I/O stations and field couplers
- ▶Bus terminals and head stations
- ▶Safety I/O modules
Common Symptoms
Brands We Service
Our Repair Process
Channel-Level Test
Each channel is individually tested for input range, output capability, and isolation.
Component Diagnosis
Optocouplers, output drivers, ADCs and protection circuits are isolated and verified.
Repair
Failed components replaced and channels re-isolated and re-calibrated.
Full-Card Test
Repaired card is tested as a whole with simulated field signals.
Warranty Return
Up to 6 months warranty with written test report.
Need Controllers & I/O?
Send photos and model number for a free quote within 24-48 hours.
Frequently Asked Questions
Can you repair only one bad channel on a card?+
Yes — we can repair individual channels and test the rest, or replace the channel front-end completely.
Will the calibration hold after repair?+
We re-calibrate analog channels against reference sources and provide test data.
Do you stock spare I/O cards?+
For some popular models — ask on WhatsApp with the part number.