The ABB Bailey LMUSM02 is a Unit Signal Module (USM) used within the INFI 90 / Net 90 distributed control system (DCS) architecture. It functions as an intelligent signal interface module designed to handle local I/O signal conditioning, multiplexing, and communication support between field devices and the main control system.
In industrial automation systems, the LMUSM02 plays a key role in improving signal organization and reducing wiring complexity. It is commonly deployed in power generation plants, oil & gas facilities, petrochemical processing units, and large-scale industrial control environments, where stable signal handling and modular expansion are essential for reliable plant operation.
Technical Specifications
| Item | Specification |
|---|---|
| Product Type | Unit Signal Module |
| System | ABB Bailey INFI 90 / Net 90 DCS |
| Function | Signal conditioning and I/O interface management |
| Signal Handling | Analog & digital signals (system dependent) |
| Interface Role | Links field I/O modules with control system bus |
| Processing Type | Local signal coordination (non-CPU module) |
| Communication | INFI 90 backplane / system bus |
| Compatibility | IMASI / IMRAE / IMDSI / IMDSO modules |
| Expansion Support | Modular I/O system integration |
| Isolation | System-level electrical isolation |
| Module Format | Rack-mounted electronic module |
| Installation Type | Backplane slot mounting |
| Operating Temperature | 0°C to 70°C |
| Humidity | 5%–95% non-condensing |
| Protection Class | Industrial control environment rated |
Dimensions & Weight
| Item | Value |
|---|---|
| Size (L × W × H mm) | 203 × 51 × 254 mm |
| Weight | approx. 0.9 – 1.2 kg |
Recommended Related Models
- ABB IMASI series – analog input modules
- ABB IMRAE11 / IMRAE12 – analog signal acquisition modules
- ABB IMDSI / IMDSO series – digital I/O modules
- ABB IMQRS02 – quick response slave module
- ABB IMMFP11 / IMMFP12 – multifunction processor modules
Popular ABB Bailey Models
- INFI 90 unit interface modules (USM series)
- Bailey Harmony distributed control systems
- ABB Symphony process automation platforms
- Net 90 legacy I/O architecture
- Industrial modular DCS signal systems
