SCADA Field I/O Technician

The Mid-Level SCADA Field I/O Technician is responsible for the installation, maintenance, testing, and troubleshooting of field-level I/O devices and their integration with SCADA systems. This role plays a key part in signal integrity assurance, loop checking, field diagnostics, and system reliability across production, utility, or infrastructure control systems.

Key Responsibilities:

• Perform installation, termination, and labeling of field instruments and I/O wiring.

• Conduct loop checks and signal verification for analog and digital I/O points.

• Support commissioning, tag validation, and system integration with control rooms.

• Diagnose issues with field devices, signal loss, wiring faults, or SCADA mapping errors.

• Interpret wiring diagrams, P&IDs, loop drawings, and panel layouts.

• Coordinate with engineers, integrators, and SCADA teams during upgrades or shutdowns.

• Document wiring changes, loop test results, and device configurations.

• Ensure compliance with site safety and electrical standards.

Key Focus Areas:

1. Advanced Loop Testing & Troubleshooting

   • Independently test and diagnose:

     • 4–20 mA loops, 0–10V signals

     • DI/DO faults, field-to-panel mismatches

     • SCADA data mismatches

2. Field-to-SCADA Signal Validation

   • Validate correct tag addressing and signal reflection on HMI/SCADA

   • Coordinate with SCADA teams during point mapping or tag updates

3. Wiring & Termination Integrity

   • Execute high-quality wiring for analog/digital inputs and outputs

   • Labeling, cable routing, shielding, and earthing in panels and field junction boxes

4. Preventive Maintenance & Calibration Support

   • Periodic inspection of sensors and wiring integrity

   • Assist calibration team with signal stability checks

5. Documentation & Change Control

   • Maintain redline drawings, terminal lists, and loop folders

   • Support updates to I/O databases and tag registers during changes

Qualifications:

• Education:

  • Diploma / ITI in Instrumentation, Electrical, Electronics, or Mechatronics

• Experience:

  • 2–5 years in industrial SCADA/automation fieldwork

• Technical Skills:

  • Proficient with:

    • Loop testers, multimeters, HART communicators

    • Panel wiring, cable laying, termination

    • Basic understanding of PLC/DCS I/O architecture

  • Exposure to SCADA platforms (e.g., Wonderware, iFIX, WinCC) is a plus

• Soft Skills:

  • Strong attention to detail and structured work habits

  • Ability to work under time pressure in field conditions

  • Good documentation and communication skills