Description
Key Technical Specifications
| Parameter | Typical / Verified Value |
|---|---|
| Brand | ALSTOM |
| Model | LC105A-1 |
| Product Type | Digital/discrete output module |
| Platform | ALSTOM Alspa CE2000 / LC105 I/O family |
| Channel Type | Digital outputs (relay/solenoid/contactor control) |
| Channel Count | Verify on nameplate |
| Output Voltage | Typically 24 VDC class; verify per label |
| Power Supply | Typically 24 VDC system supply (19.2–28.8 VDC family-typical) |
| Mounting | Plug-in rack / backplane-mounted I/O card |
| Hot Swap | Supported in compatible ALSTOM racks |
| Indicators | LED status/fault indication typical |
| Operating Temperature | -20 °C to +60 °C commonly cited for LC105 family; verify per unit |
| Weight | ~0.89 kg reported in some listings; confirm physically |
Product Introduction
The ALSTOM LC105A-1 is a legacy digital output module used in ALSTOM Alspa CE2000 and related LC105-series automation systems. It provides discrete output channels for driving field devices such as relays, solenoid valves, motor starters, and indicator circuits from within an ALSTOM DCS/PLC rack.
This module is typically backplane-powered and communicates with the host controller through the system’s internal bus. It is not a standalone PLC, motion controller, or turbine control CPU. Because LC105A-1 units are now mainly available as surplus or refurbished stock, the physical nameplate, channel configuration, and rack compatibility should be verified before procurement.
QA/QC Transparency SOP
- Intake & Origin Verification: Confirm model LC105A-1 and any associated ALSTOM part number on the label. Photograph serial number, revision, channel table, and connector condition.
- Visual Inspection: Check for burnt output drivers, swollen capacitors, corroded backplane pins, cracked housing, or damaged terminal blocks.
- Power-Up Test: Install in a compatible ALSTOM test rack. Verify LED status, backplane communication, and absence of immediate fault alarms.
- Output Channel Test: Energize each output channel under rated load. Verify switching behavior, voltage drop, short-circuit protection, and LED indication.
- Final QC & Packaging: Label the unit with verified model, revision, channel configuration, and test results. Seal in anti-static packaging. Any module with failed channels, unstable backplane communication, or unreadable labels is quarantined.
Field Engineer Gotchas
- Output vs. input confusion. Some aftermarket pages incorrectly label LC105A-1 as a digital input module. The more consistent references identify it as a digital/discrete output module.
- Wrong platform association. Do not confuse it with Moog/M3000 motion controllers or unrelated PLC families. belongs to the ALSTOM Alspa CE2000 / LC105 I/O family.
- Channel rating mismatch. Output voltage and current ratings vary by revision. Verify the nameplate before connecting field loads.
- Backplane dependency. This is a rack-mounted I/O card. It requires a compatible ALSTOM chassis, backplane, and host controller.
- Legacy spare risk. Surplus units may have undocumented revisions or previous field wiring damage. Always test output channels under load.
ALSTOM LC105A-1
Application Scenarios
- Replacement of a failed digital output card in an ALSTOM Alspa CE2000 rack.
- Spare-parts provisioning for legacy power, water, chemical, or manufacturing plants running ALSTOM DCS.
- Refurbishment of obsolete I/O racks where migration is not yet approved.
- Commissioning support where an existing LC105 output channel has degraded or failed.
FAQ
It is most consistently referenced as a digital/discrete output module for ALSTOM Alspa CE2000 / systems.
Can it be used in any ALSTOM rack?
No. It requires a compatible Alspa or -series rack. Backplane type, slot width, and firmware must match.
What voltage does it use?
Typically 24 VDC system-level supply, but the exact rating must be confirmed from the physical nameplate.
Is it still in production?
It is primarily available as surplus or refurbished stock. Current lifecycle status should be confirmed with ALSTOM/GE or an authorized distributor.
Do you provide an OEM datasheet?
A verified OEM datasheet specifically for is not attached here. Final validation should be done against the physical module label and the existing system documentation.
