Overview
The Modicon AS-B875-002 is an 8-channel analog input module engineered for seamless integration of 4-20mA current-loop signals into legacy Modicon Quantum and 984 series PLCs. This module converts analog input signals to 1-5V outputs, enabling accurate measurement and monitoring of industrial sensors, transmitters, and field devices. As a discontinued but still-operational component in many installed automation systems, the AS-B875-002 remains critical for maintenance, repair, and modernization projects.
Key Features
- 8-channel simultaneous analog input configuration
- 4-20mA current loop input with 1-5V output scaling
- Direct compatibility with Modicon Quantum 800 series I/O platforms
- Compact modular design for DIN-rail mounting
- Industrial-grade signal conditioning for reliable operation
- Legacy support for 984 series and Evolution I/O adapter systems
Technical Specifications
- Channels: 8 analog input channels
- Input Signal: 4-20mA current loop
- Output Range: 1-5V DC
- Resolution: 12-bit digital conversion
- Sampling Rate: 40 Hz per channel
- Mounting: DIN-rail compatible
- Operating Temperature: 0°C to 60°C
- Storage Temperature: -20°C to 80°C
- Part Family: Modicon B875 Series
Typical Applications
- Process control systems requiring multi-channel analog monitoring
- Environmental monitoring (temperature, pressure, flow measurement)
- Legacy PLC retrofit and spares inventory
- Industrial automation signal conditioning
- Manufacturing equipment integration and upgrade projects
Compatibility & Replacements
Compatible With
- Modicon Quantum 800 series I/O platforms
- Modicon 984 series PLCs
- Modicon Evolution I/O adapter systems (Gen 7 and Gen 8)
- Schneider Electric X80 I/O infrastructure
- Legacy industrial control networks requiring 4-20mA signal integration
Replaces / Drop-In Replacement For
- AS-B875-001 (when additional 4-20mA channel capacity required)
- Earlier B875-series modules in field upgrades
- Custom analog signal conditioning cards in legacy deployments
Works With
- Modicon Programming Suite (Concept/ProWORX)
- Schneider Unity Pro software environments
- 4-20mA current-loop sensors and transmitters
- Field device networks requiring analog integration
- Distributed I/O expansion via Evolution adapters
