Overview
The Modicon AS-H819-100 is a 19″ secondary I/O housing assembly for the 800 series PLC platform. This 7-slot backplane chassis expands I/O capacity in primary and secondary drop configurations. Modicon is a registered trademark of Schneider Electric, and the AS-H819-100 remains in active use across legacy and modernized automation systems requiring remote I/O distribution.
Key Features
- 7 empty module slots for flexible I/O module installation
- 19″ rack-mount form factor fits standard 19″ enclosure mounting rails
- Compatible with Modicon 800 series I/O modules (digital input, output, analog, specialty cards)
- Supports both primary backplane and secondary remote drop configurations
- Passive backplane design—no onboard logic; modules plug directly into card edge connectors
Technical Specifications
- Housing Type: 19″ secondary backplane chassis
- Slot Capacity: 7 I/O module slots
- Series: Modicon 800
- Mounting: 19″ rack mount (standard EIA)
- Backplane Technology: Card-edge connector based
- Module Support: Modicon 800 series I/O, processor, and power supply modules
- Power Distribution: Via installed power supply modules (not included)
Typical Applications
- Remote I/O drops connected to primary controllers via Modbus Plus or Remote I/O networks
- Secondary backplane expansion for multi-controller automation systems
- Distributed I/O in large facilities where local module density is required
- Legacy 800 series system expansion and retrofit installations
Compatibility & Replacements
Compatible With
- Modicon 800 series digital I/O modules (B806, B808, B809 series)
- Modicon 800 series analog I/O modules (B872, B877, B838 series)
- Modicon 984 series processors in primary configurations
- Modicon Remote I/O (RIO) adapter cards and network modules
- Modbus Plus network for distributed I/O systems
Replaces / Drop-In Replacement For
- Original Modicon 800 series secondary housings as direct mechanical/electrical substitute
- Verify specific application with system documentation before field replacement
Works With
- Modicon 984 PLC systems (primary and remote drop configurations)
- Modicon M340, M241, and modular Quantum platforms (with appropriate adapter modules)
- Modbus Plus serial networks and Remote I/O protocols
- Modsoft and EcoStruxure Machine Expert legacy programming environments
