Overview
The Modicon AS-B814-108 is a dedicated relay output module for the Modicon 800 Series I/O platform. It converts signals from the PLC to eight independent relay outputs, each capable of driving a relay, pilot lamp, motor starter, solenoid, or any other load up to 5.0 A. Rated for 5 amp at 30 VDC or 4 amp at 230 VAC, this module is designed for reliable discrete output control in industrial automation environments.
Key Features
- Selectable Configuration: User configurable as normally open or normally closed operation; shipped with all eight channels jumpered for normally open configuration, with optional field wiring for normally closed operation.
- Electrical Isolation: Each of the eight outputs is electrically isolated from the I/O bus and from the other seven outputs by the relay coil.
- Industrial-Grade Design: Designed to withstand the high surge currents typical of industrial loads.
- Multiple Load Types: Supports relays, solenoids, motor starters, and pilot lamps.
- Compact 800 Series Form Factor: Modicon 800 Series I/O product family.
Technical Specifications
Verified specifications for the Modicon AS-B814-108 relay output module:
- Module Type: 8-Point Relay Output
- Contact Rating (DC): 5 Amp at 30 VDC
- Contact Rating (AC): 4 Amp at 230 VAC
- Configuration: Selectable N.O. / N.C. per channel
- Isolation: Relay-isolated, independent per output
- Weight: Approximately 3–5 lbs
- Series: Modicon 800 Series I/O
- Manufacturer: Modicon (Schneider Electric legacy product)
- Status: Discontinued by manufacturer
Typical Applications
The AS-B814-108 is widely used in:
- Industrial machine control systems requiring relay-based discrete outputs
- Motor starter and solenoid control circuits
- Pilot light and alarm indication circuits
- Legacy automation systems using Modicon 800 Series controllers
- Process control applications requiring galvanic isolation
- Material handling and packaging machinery
Compatibility & Replacements
Compatible With
- Modicon 800 Series PLC controllers
- Modicon Compact series I/O platforms
- Modicon 984 Series systems with appropriate interface adapters
- Standard 24 VDC relay logic circuits
- Mixed I/O environments with other Modicon input/output modules
Replaces / Drop-In Replacement For
- Modicon B814-108 (earlier designation)
- AEG B814-108 (OEM variant)
- Legacy Gould Modicon relay output modules in the same category
Works With
- Modicon Programming Environments (M34, M58, etc.)
- Modicon 800 Series discrete I/O programming logic
- Direct wiring to PLC relay logic outputs
- Standard industrial control circuits and motor control centers
