Overview
The Bailey NAMM03 6637203D1 is an analog master module for the Network 90 distributed control system (DCS) platform. This legacy industrial automation component was designed by Bailey Controls (now part of ABB) for digitizing and conditioning analog sensor signals in process control and manufacturing environments. The NAMM03 provides robust signal acquisition and processing with support for multiple analog input types, making it a critical interface between field instruments and the DCS control logic.
Key Features
- Accepts up to 64 analog inputs (4-20 mA, thermocouple, millivolt, RTD)
- Digitizes sensor signals and converts to percent and engineering units
- Performs polynomial adjustment, square root extraction, and alarming functions
- Supports trending and local/remote cold junction compensation
- Redundancy capable when paired with a second Analog Master Module
- ±15V DC and +5V DC supply voltages for flexible integration
Technical Specifications
- Module Type: Analog Master Module
- Platform: Network 90 DCS
- Part Number: 6637203D1
- Model: NAMM03
- Input Channels: Up to 64 analog inputs
- Input Types: 4-20 mA, thermocouple, millivolt, RTD
- Supply Voltage: ±15V DC, +5V DC
- Power Consumption: 7 VA
- Manufacturer: Bailey Controls (ABB)
- Signal Processing: Polynomial adjustment, square root extraction, alarming, trending, cold junction compensation
Typical Applications
The Bailey NAMM03 is widely deployed in legacy and maintained industrial control systems including:
- Oil and gas production facilities
- Chemical and petrochemical processing plants
- Power generation and utility control systems
- Water treatment and environmental monitoring
- Manufacturing process control and instrumentation
- HVAC and building automation systems (retrofit applications)
Compatibility & Replacements
Compatible With
- ABB/Bailey Network 90 DCS platforms
- INFI-90 control systems
- Legacy Bailey instrumentation and sensor networks
- 4-20 mA transmitters and industrial sensors
- Thermocouple and RTD temperature sensors
Replaces / Drop-In Replacement For
The NAMM03 6637203D1 is a specific revision of the NAMM03 series. Common related part numbers in this family include 6637203A1 and other D-series variants. Verify exact compatibility with your system documentation before substitution.
Works With
- ABB Bailey Network 90 operating system
- INFI-90 configuration software
- Legacy DCS networking protocols
- Bailey instrument I/O modules and field devices
