Products Description
ALSTOM AB121 Digital Input Control Module in stock
ALSTOM AB121 is a rack-mounted digital input module designed for Alstom T2000 DCS control system. It collects digital on/off status signals from field sensors, limit switches and relays, and transmits the processed digital data to the main controller via backplane bus.
This module adopts industrial-grade circuit design with built-in signal isolation and fault detection function. It is a discontinued legacy spare part, widely used for maintenance replacement of old power plant and process automation control systems.
Main Specifications
| No. | Item | Parameter |
|---|---|---|
| 1 | Brand | ALSTOM |
| 2 | Model | AB121 |
| 3 | Module Type | Digital Input Control Module |
| 4 | Signal Type | Digital switch input |
| 5 | Feature | Optoelectronic isolation for each channel |
| 6 | Mounting | Rack mount, backplane bus connection |
| 7 | Operating Temperature | 0 ~ +60°C |
| 8 | Status | Discontinued legacy spare part |
Core Functions
| No. | Function Description |
|---|---|
| 1 | Collect on-off digital signals from field switches and sensors |
| 2 | Optoelectronic isolation to protect internal circuit from field interference |
| 3 | Transmit digital status data to DCS controller via rack backplane bus |
| 4 | Channel fault diagnosis and LED indicator for channel status display |
| 5 | Real-time signal acquisition for interlock and protection logic judgment |
Application Scenarios
| No. | Application |
|---|---|
| 1 | ALSTOM T2000 DCS distributed control rack system |
| 2 | Thermal power plant turbine interlock and protection control system |
| 3 | Petrochemical plant safety interlock and field signal monitoring |
| 4 | Legacy industrial control system spare replacement and retrofit |
FAQ
| No. | Question & Answer |
|---|---|
| 1 | Q: What is ALSTOM AB121? A: ALSTOM AB121 is digital input module for T2000 DCS, used for collecting field switch status signals and sending data to main controller. |
| 2 | Q: What protection design does this module have? A: It adopts optoelectronic isolation for each channel to reduce interference from field side. |
| 3 | Q: Which system is AB121 suitable for? A: It is specially designed for ALSTOM T2000 DCS control platform. |
