ABB Bailey NTCS04 Control I/O Termination Unit

ABB Bailey NTCS04 Controller/Station Termination Unit

The ABB Bailey NTCS04 is a Controller/Station Termination Unit for the INFI 90 distributed control system. It provides the physical wiring interface between INFI 90 control modules and field devices, supporting analog inputs, digital I/O, and serial communication connections in a compact, modular design.

Key Specifications

• Part Number: NTCS04
• Product Type: Controller/Station Termination Unit
• Series: INFI 90 / Symphony
• Manufacturer: ABB / Bailey Controls
• Inputs: 4 analog (4–20 mADC); 3 digital (24 VDC or 125 VDC)
• Outputs: 2 analog (1–5 VDC or 4–20 mADC); 4 digital (24 VDC, isolated open-collector)
• Surge Protection: Meets IEEE-472-1974 Surge Withstand Capability Test
• Certification: CSA certified for process control equipment in ordinary (non-hazardous) locations
• Power: 24 V DC
• Operating Temperature: 0°C to 70°C (32°F to 158°F)
• Relative Humidity: 0% to 95% up to 70°C (non-condensing)
• Altitude: Sea level to 3 km (1.86 miles)
• Air Quality: Non-corrosive
• Dimensions: 203 × 25 × 178 mm (8.0" × 1.0" × 7.0")
• Weight: 0.4 kg (0.88 lbs)
• Mounting: Occupies one slot in standard INFI 90 field termination panel
• Compatibility: IMCISX2, IMQRS02, NKTU01 modules

Features & Benefits

1. Mixed Signal Support: Handles both analog and digital signals in a single termination unit, reducing panel space.
2. IEEE Surge Protection: Built-in surge withstand capability protects downstream electronics from transient events.
3. CSA Certified: Approved for ordinary location process control equipment installation.
4. Modular Design: Single-slot footprint allows dense termination layouts in control panels.
5. Isolated Digital Outputs: Open-collector outputs with isolation prevent ground loop issues.

Applications

• Control I/O termination for process control stations
• Analog transmitter and actuator signal wiring
• Digital limit switch and solenoid valve connections
• Serial communication interface termination

FAQ

Q: What modules are compatible with NTCS04?
A: The NTCS04 is compatible with IMCISX2, IMQRS02, and NKTU01 modules. Verify your specific module's termination requirements before ordering.

Q: Can NTCS04 be used in hazardous locations?
A: The NTCS04 is CSA certified for ordinary (non-hazardous) locations. For hazardous area applications, consult ABB for appropriate rated termination units.

Q: What is the maximum altitude for NTCS04 operation?
A: The NTCS04 is rated for operation from sea level to 3 km (1.86 miles) without derating.

Installation Guide

1. Unpack and inspect NTCS04 for shipping damage.
2. Install fuse and configure dipshunts per system design.
3. Mount NTCS04 in standard INFI 90 field termination panel slot.
4. Connect field wiring to designated terminals per wiring schedule.
5. Verify analog signal shield grounding and digital output isolation.
6. Perform continuity and insulation resistance tests before energizing.

Selection Tips

• Signal Mix: Confirm your application requires the specific analog/digital I/O mix provided by NTCS04.
• Voltage Rating: Verify digital input voltage (24 VDC vs. 125 VDC) matches your field device specifications.
• Spare Fuses: Stock replacement fuses compatible with NTCS04 fuse holders.