Product Core Brief
- Model: LC105A-1
- Brand: ALSTOM
- Series: ALSTOM Alspa CE2000 / Legacy PLC & DCS Platform
- Core Function: Digital discrete output module used to drive relays, solenoid valves, indicators, and other field devices in ALSTOM control systems.
- Product Type: Digital Output Module / Discrete I/O Card / Spare Control Card
- Key Specs: Multiple digital output channels | PLC/DCS rack-mounted | Relay and solenoid valve control | Industrial automation application
- Condition: New Original / New Surplus
Product Introduction
ALSTOM LC105A-1 is a digital discrete output module referenced for ALSTOM automation systems, most commonly associated with the Alspa CE2000 platform. It provides multiple digital output channels for controlling external devices such as relays, solenoid valves, actuators, and status indicators.
The module is typically installed in ALSTOM PLC/DCS racks and integrates with broader control architectures through backplane communication. It is used as a maintenance spare in power generation, substation automation, rail transit, manufacturing, and process control environments where ALSTOM legacy control systems remain in service.
Public listings describe LC105A-1 as a digital output or discrete output module, but some sources also mix it with digital input descriptions or broader controller features. Therefore, channel count, output type, voltage rating, and backplane compatibility must be confirmed from the installed nameplate, rack documentation, or system configuration before replacement.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Model | M |
| Product Type | Digital Discrete Output Module |
| System Platform | ALSTOM Alspa CE2000 / Legacy PLC & DCS Platform |
| Core Function | Discrete output control for relays, solenoids, and field devices |
| Output Type | Digital/discrete output; confirm relay, transistor, or dry-contact type |
| Channel Count | Confirm per installed nameplate |
| Output Voltage/Current | Confirm per installed nameplate |
| Installation | PLC/DCS rack-mounted module |
| Typical Applications | Power plants, substations, rail systems, manufacturing, and process automation |
| Operating Environment | Industrial control cabinet; confirm temperature and power rating |
Quality Control Process
- Visual and code check: Confirm LC105A-1 labeling, PCB condition, connectors, and front hardware.
- Slot and backplane inspection: Verify rack model, slot position, and backplane contact condition.
- Power and isolation check: Confirm supply voltage, polarity, and output isolation before energizing.
- Output channel check: Verify discrete output response, LED indicators, and load driving capability.
- Final packing: Record test results, apply asset labels, and ship in anti-static packaging with connector protection.
Replacement Pitfall Guide
❗ Confirm output type and rating. LC105A-1 is commonly listed as a digital output module, but public descriptions vary; verify whether outputs are relay, transistor, or dry-contact type.
❗ Verify rack and slot compatibility. The module must match the installed ALSTOM PLC/DCS rack and slot configuration.
❗ Check channel mapping after replacement. Incorrect I/O addressing can cause misoperation of relays, solenoid valves, or interlocks.
❗ Validate field wiring before commissioning. Output polarity, load voltage, and short-circuit protection must be checked against cabinet drawings.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| M | M | Direct | Like-for-like replacement when rack, slot, and I/O mapping match. |
| M | ALSTOM LC105 series I/O module | Needs Adaptation | Confirm output type, channel count, power supply, and rack compatibility. |
| M | Other ALSTOM/Alspa CE2000 I/O card | Needs Adaptation | Requires verification of backplane interface, I/O address, and control logic. |
- Typical use: ALSTOM Alspa CE2000 and legacy PLC/DCS racks for power, rail, substation, and industrial automation.
- Key verification points: LC105A-1 part number, host rack model, slot position, output type, channel count, and I/O address mapping.
