Model Number Explanation

• AS: Modicon Automation System component

• 884A: Compact 884A CPU series

• 111: Enhanced variant with 2K memory, dual Modbus ports, RIO support, 115/230V AC power

Technical Specifications

• CPU: 8086 main processor + dual 8051 front‑end processors

• User Logic Memory: 2K words

• Register Memory: 1K words

• Max I/O Capacity: 256 discrete input/output points

• Power Supply: 115/230V AC, 50/60 Hz

• Communication: Dual Modbus RTU ports (RS‑232/485); supports RIO networks

• Programming Interface: P190 (programming/diagnostics)

• Operating Temperature: 0°C to +60°C

• Storage Temperature: −40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Dimensions: ≈250 × 80 × 150 mm

• Weight: ≈0.45 kg

• Certifications: CE, UL 508, CSA

Interface & Configuration

• Backplane Connection: Modicon 800/984 series rack connector

• Communication Ports:

  • Port 1: Modbus RTU (RS‑232/485, standard)

  • Port 2: Modbus RTU (RS‑485, dedicated for RIO)

• Expansion Slots: Supports optional communication/I/O expansion cards

• Mounting: Rack‑mount or panel‑mount compatible

Key Features

• Dual Modbus Ports: Enables simultaneous connection to HMI/SCADA and remote I/O networks

• 2K User Memory: Supports complex control programs and data logging

• Remote I/O (RIO): Built‑in RIO communication for distributed I/O architectures

• High‑Speed Processing: 8086 + dual 8051 architecture for fast logic execution

• Diagnostics: Power‑up self‑tests, real‑time fault monitoring, and LED status indicators

• Legacy Compatibility: Native fit for Modicon 984/884 series racks and I/O modules

Applications

• Systems: Schneider Modicon 984, 884 series PLC systems

• Industries: Manufacturing, process automation, power generation, water treatment, HVAC

• Use Cases: Mid‑range machine control, production line automation, distributed I/O systems, legacy system upgrades

Compatibility

• I/O Racks: Modicon 800 series I/O racks, 984 series backplanes

• I/O Modules: Modicon 800/984 series digital/analog I/O modules

• Software: Compatible with Modicon Concept, ProWORX 32 programming software

Difference from AS-884A-101

• AS-884A-101: Single Modbus port, basic RIO support

• AS-884A-111: Dual Modbus ports (enhanced RIO/communication), same 2K memory and performance