Schneider Electric AS-H819-209 Modicon 800 Series Primary Housing

The AS-H819-209 (also referenced as ASH819209) is a 19-inch primary chassis rack engineered for Schneider Electric's legacy Modicon 800 Series programmable logic controller (PLC) systems. Designed for standard panel or rack mounting, this housing unit establishes the central backplane bus (SYSBUS) interconnections between a primary remote I/O processor and installed I/O modules, enabling real-time signal processing and system expansion.

System Architecture and Slot Configuration

The housing features a total of 7 backplane card positions designed to accommodate one primary processor (such as an ASP890300 Remote I/O processor) alongside up to 6 Modicon 800 Series I/O modules. Integrated heavy-duty card guides and backplane connectors ensure secure structural alignment and stable high-speed internal bus signals across the SYSBUS platform.

Physical Integration and Industrial Design

Constructed for standard 19-inch industrial rack mounting, the enclosure provides rigid structural protection for critical control cards operating in severe industrial environments. Power supply voltages (+5 VDC and +4.3 VDC) and backplane communication signals are distributed directly across the integrated bus structure, eliminating complex internal point-to-point wiring between local modules.

Parameter Specification

Frequently Asked Questions

Q: What is the functional difference between the AS-H819-209 primary housing and secondary housing units? A: The AS-H819-209 is a primary housing designed to hold the main remote I/O processor module alongside standard I/O modules. Secondary housings (such as AS-H819-100) are reserved strictly for expansion I/O modules and do not support primary processor units.

Q: How many I/O modules can be installed into a single AS-H819-209 rack? A: Out of the 7 available slots, 1 slot is designated for the primary processor, leaving 6 dedicated slots available for 800 Series discrete or analog I/O modules.