Product Details:

MODICON AS-J892-001, also known as J892, is an ASCII remote I/O interface and remote I/O controller for the classic Modicon 984 and 800 automation platforms, originally produced by Gould Modicon. It acts as a dedicated communication gateway that bridges the main processor, remote I/O racks and external ASCII devices, managing S908 RIO network traffic and asynchronous serial data transmission simultaneously. This unit comes equipped with two independent 25-pin D-SUB ASCII ports for connection to printers, operator terminals and other serial intelligent peripherals, while the built-in RIO interface handles polling of distributed remote I/O nodes over coaxial cable. It continuously forwards input status from field I/O back to the host CPU and distributes output commands to remote racks, with onboard LED indicators to show ready status, communication activity and fault alarms for quick field diagnosis. Built with industrial-grade circuitry and integrated surge and noise suppression, it maintains stable data transmission in factory environments with heavy electromagnetic interference. As an obsolete original spare part, it is reserved for maintenance and retrofitting of legacy Modicon distributed control systems. Direct drop-in replacement keeps the existing coaxial RIO wiring, serial peripheral layout and rack configuration unchanged, eliminating redesign of the remote I/O network and cutting production downtime.

Basic Parameters

Product type: ASCII RIO interface remote I/O controller

Compatible series: Modicon 984 and 800 series

Serial ports: two 25-pin D-SUB ASCII channels

Network interface: S908 remote I/O coaxial bus

Mounting: rack mount for Modicon dedicated backplane

Max operating altitude: 2000 m

Operating temperature: 0°C ~ +55°C

Protection grade: IP20

Supported Functions

S908 remote I/O bus polling and data forwarding

ASCII serial data transmit and receive

Communication status monitoring and fault reporting

Data exchange between host CPU and remote racks

Serial peripheral connection and data printout

Bus signal conditioning and isolation

Core Functions

Continuous polling of distributed remote I/O nodes

Onboard multi LED for ready, comm and fault indication

Bus line transient surge suppression

ASCII frame parsing and bidirectional transfer

Data frame verification and error retransmission

Diagnostic flag storage for communication failures

Hardware Specifications & Environmental Features

Built-in bus noise filtering and surge suppression circuit

Storage temperature: -20°C ~ +70°C

Relative humidity: 5% to 95% non-condensing

Status: Obsolete original part, available for spare replacement

Industry Applications:Applied in legacy petrochemical distributed control, old paper making production automation, water treatment remote signal collection and large conveyor remote I/O control racks.

Note:Confirm S908 network type, backplane compatibility and serial pin assignment before ordering.

This is from our current stock.

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