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AS111A-2
AS111A-2
AS111A-2

ALSTOM AS111A-2 Advanced Analog Signal Isolation & Conditioning Module

The ALSTOM AS111A-2 retains the core functionality of isolating and conditioning 4–20mA or 0–10V signals but introduces key upgrades. Its isolation rating is boosted to 3kVrms (from 2.5kVrms in the AS111-2), providing enhanced protection in high-voltage environments like utility substations or electric vehicle battery testing labs. The adaptive filtering system is refined with a user-configurable mode: engineers can now preset filter profiles (e.g., “fast transient” for hydraulic systems or “low noise” for analytical instruments) via DIP switches, balancing between noise reduction and response time based on specific application needs.

Model Number AS111A-2
Brand ALSTOM
Type Advanced Analog Signal Isolation & Conditioning Module
Input Voltage24 VDC ±15% (wider range than AS111-2; loop-powered mode supported)
Operating Temp Range-40°C to +80°C (extended high-temp tolerance)
Mounting StyleDIN rail (35mm) with DIN EN 50022 compliance
Dimensions22.5mm x 105mm x 125mm (W x H x D) (slight height increase for diagnostic components)
Weight140g
Interface/BusField terminals (input/output); digital status pin (for diagnostics)
ComplianceIEC 61010-1, IEC 61326-1 (Class B EMC), UL 508, ATEX Zone 2 (hazardous area approval)
Supported ProtocolsN/A (analog processing); digital status via 2-state signal
Typical Power Draw0.9W (loop-powered); 1.3W (externally powered, including diagnostics)

 

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Description

The ALSTOM AS111A-2 retains the core functionality of isolating and conditioning 4–20mA or 0–10V signals but introduces key upgrades. Its isolation rating is boosted to 3kVrms (from 2.5kVrms in the AS111-2), providing enhanced protection in high-voltage environments like utility substations or electric vehicle battery testing labs. The adaptive filtering system is refined with a user-configurable mode: engineers can now preset filter profiles (e.g., “fast transient” for hydraulic systems or “low noise” for analytical instruments) via DIP switches, balancing between noise reduction and response time based on specific application needs.

AS111A-2

AS111A-2

A standout addition is the module’s integrated health monitoring. It continuously measures isolation barrier integrity, input/output signal deviation, and internal temperature, transmitting this data via a digital status pin to PLCs or asset management systems. This enables predictive maintenance: for instance, a gradual increase in isolation resistance drift can be flagged as a precursor to barrier failure, allowing proactive replacement. The ALSTOM AS111A-2 also expands input compatibility to include ratiometric sensors (e.g., strain gauges with 0.5–4.5V output), eliminating the need for external signal converters in structural health monitoring applications.

AS111A-2

AS111A-2

Technical specifications:
Model Number AS111A-2
Brand ALSTOM
Type Advanced Analog Signal Isolation & Conditioning Module
Input Voltage24 VDC ±15% (wider range than AS111-2; loop-powered mode supported)
Operating Temp Range-40°C to +80°C (extended high-temp tolerance)
Mounting StyleDIN rail (35mm) with DIN EN 50022 compliance
Dimensions22.5mm x 105mm x 125mm (W x H x D) (slight height increase for diagnostic components)
Weight140g
Interface/BusField terminals (input/output); digital status pin (for diagnostics)
ComplianceIEC 61010-1, IEC 61326-1 (Class B EMC), UL 508, ATEX Zone 2 (hazardous area approval)
Supported ProtocolsN/A (analog processing); digital status via 2-state signal
Typical Power Draw0.9W (loop-powered); 1.3W (externally powered, including diagnostics)

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