Description
The ABB Bailey 6637517A1 (frequently stamped or referenced with drawing classification code 660-MISC-3311) is a specialized Interface Circuit Board / Component Assembly manufactured by Bailey Controls (now part of ABB / Emerson) for the Bailey INFI 90 and NETWORK 90 Distributed Control System (DCS) platforms.
Deployed across heavy industrial process plants, power generation stations, and continuous manufacturing facilities, this module serves as an internal subassembly or interface card designed to maintain reliable data handling, operator interaction, or memory retention within legacy Bailey control architecture.
Technical Specifications
| Parameter | Specification |
| Manufacturer | Bailey Controls / ABB |
| System Platform | Bailey INFI 90 / NETWORK 90 Distributed Control System (DCS) |
| Part / Catalog Number | 6637517A1 |
| Drawing / Assembly Code | 660-MISC-3311 (Internal Bailey production/drawing classification) |
| Module Type | Interface Circuit Board / Component Panel Assembly |
| Operating Temperature | 0°C to +60°C (32°F to +140°F) standard industrial range |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | 5% to 95% non-condensing |
| Mounting Format | Internal module chassis rack / processor sub-assembly slot |
Core Features & Operating Capabilities
- INFI 90 System Integration: Designed specifically to interface with core Bailey processor modules, backplanes, or operator panels within standard INFI-90 cabinet racks.
- Industrial Component Reliability: Built with heavy-duty trace layouts and robust circuit components designed to withstand harsh electrical noise, vibration, and thermal cycling typical of utility environments.
- Seamless Retrofit & Maintenance: Serves as a direct field-replacement subassembly for aging or faulted hardware blocks during scheduled plant outages or processor overhauls.
- Rigorous Quality Standards: Conforms to legacy Bailey strict manufacturing tolerances, ensuring drop-in mechanical and electrical compatibility with existing INFI-NET loops.
Related Bailey INFI 90 & NETWORK 90 Components
- IMMFP03 — Multi-Function Processor Module.
- PFTC / PFPB — Bailey Main Processor Controller Cards.
- NTCL01 — Bailey Termination Units and Cabling.
- INFI-NET — Communication Highway & Control Network Infrastructure.


