Description

ABB NTAI05 Analog Input Termination Unit

Basic Information

• Model: NTAI05
• Manufacturer: ABB Bailey (Infi 90 / Symphony DCS legacy system)
• Full Name: 16-Channel High Level Analog Input Field Termination Board
• Warranty: One Year
• Matching Core Module: Works exclusively with IMASI02 analog input slave module
• Lifecycle: Discontinued original OEM spare part for old power & petrochemical DCS overhaul

1. Core Technical Specifications

Channel & Signal Configuration

• Total channels: 16 high-level analog input channels (15 effective configurable measurement channels)
• Supported signal types (set via on-board dipshunt jumpers per channel):
  • Current: 4–20mA loop-powered transmitter signal
  • Voltage: 0–1V, 0–5V, 1–5V, 0–10V, ±10V bipolar voltage
• Wiring mode: Single-ended / differential mode optional for each loop
• Load & Accuracy: Overall system measurement accuracy ±0.1% FS
• 

Electrical & Mechanical

• Interface: Rear 50-pin edge connector locks directly to IMASI02 I/O module
• Mounting: Installed on NFTP01 standard field termination panel inside DCS cabinet
• PCB Protection: Full conformal three-proof coating (moisture, dust, corrosive gas resistance)
• Operating Temperature: 0°C ~ +70°C continuous working
• Storage Temperature: -40°C ~ +85°C
• Protection Class: IP20 (indoor cabinet installation only)
• Net Weight: Approx 0.52kg

Circuit Protection

• Onboard surge suppression, ESD and transient voltage protection for each field channel
• Channel-to-DCS backplane galvanic isolation, prevents field short-circuit from damaging main controller
• Independent loop filtering to eliminate industrial EMI interference from inverters and high-voltage equipment