Modicon AS-B800 Series Modules - AS-B805-016

Name: Modicon AS-B800 Series Modules - AS-B805-016
Brand: Modicon

Model: AS-B805-016

Brand Modicon

Series AS-B800 Series

Model AS-B805-016

RFQ-ready model route Obsolete and surplus sourcing Export follow-up by model list

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Product Details And Specifications

Modicon AS-B800 Series Technical Notes

The Evolution of AS-B800 Series Architecture

The Modicon AS-B800 series was developed as part of the broader Modicon 800 platform, designed to interface with Modicon 984 and 484 series programmable controllers via the Modbus and Modbus Plus communication backbones. The architecture is based on a passive backplane with active I/O modules that communicate through a parallel bus structure — a design that prioritized deterministic scan-cycle performance over the packet-switched architectures that would later dominate fieldbus and industrial Ethernet generations.

Early variants of the AS-B800 series used discrete transistor-level logic for signal conditioning, with later revisions incorporating surface-mount components and improved noise immunity for high-EMI industrial environments. The series was designed for DIN-rail and panel-mount enclosures, with modules keyed to prevent incorrect insertion — a mechanical interlock that remains relevant when sourcing replacement units, as module revision compatibility must be verified against the host controller firmware version.

AS-B800 Series Full Catalog & Functionalities (SKU List)

The following SKUs represent confirmed members of the Modicon AS-B800 module family. Each entry reflects the module's primary functional classification within a Modicon 984-based control system.

Discrete Input Modules (DI)

AS-B805-016: 16-point 24 VDC discrete input module, sink/source compatible, standard density
AS-B805-032: 32-point 24 VDC discrete input module, high-density configuration
AS-B806-016: 16-point 120 VAC discrete input module, optically isolated
AS-B806-032: 32-point 120 VAC discrete input module, panel-mount high density
AS-B807-016: 16-point 240 VAC discrete input module, high-voltage industrial input

Discrete Output Modules (DO)

AS-B815-016: 16-point 24 VDC discrete output module, transistor sourcing type
AS-B815-032: 32-point 24 VDC discrete output module, high-density transistor output
AS-B816-016: 16-point 120 VAC triac output module, zero-crossing switching
AS-B817-016: 16-point relay output module, dry contact, 2A per point
AS-B818-016: 16-point 24 VDC sinking output module, protected outputs

Analog Input Modules (AI)

AS-B825-008: 8-channel analog input module, 4–20 mA / 0–10 V selectable, 12-bit resolution
AS-B826-008: 8-channel analog input module, thermocouple types J/K/T/E, cold junction compensated
AS-B827-004: 4-channel RTD input module, Pt100/Pt1000, 3-wire configuration

Analog Output Modules (AO)

AS-B835-004: 4-channel analog output module, 4–20 mA, 12-bit resolution, loop-powered
AS-B836-004: 4-channel analog output module, 0–10 V, short-circuit protected

Communication & Specialty Modules

AS-B875-001: Modbus Plus network adapter module for AS-B800 backplane integration
AS-B880-001: ASCII/BASIC communications module, serial RS-232/RS-485 dual port

Sourcing Hard-to-Find & Obsolete AS-B800 Series Parts

The AS-B800 series reached end-of-manufacture status under Schneider Electric's product lifecycle policy. New units are no longer produced. The global supply of serviceable modules is finite and distributed across industrial surplus channels, decommissioned plant inventories, and specialist distributors.

Quality Control for the AS-B800 Series Range

The AS-B800 series presents specific reliability challenges that require targeted inspection protocols beyond standard functional testing. DriveKNMS applies the following procedures to all AS-B800 modules prior to dispatch:

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