Model Number Explanation

AS: Modicon Automation System component

B351: 300-series discrete AC input module (8-channel, 115VAC)

001: Standard version (no conformal coating, basic isolation)

Technical Specifications

Input Type: Discrete AC voltage, 8 independent channels

Input Voltage: 115VAC (79–164VAC operating range)

Input Current: ≤2mA per channel

Isolation: Channel-to-backplane 1500VAC optical isolation

Status Indicators: Neon LED per channel (field-side ON/OFF)

Transient Protection: Built-in surge suppression (compliant with IEEE 472-1974, ANSI C37.90A)

Operating Temperature: 0°C to +60°C

Storage Temperature: −40°C to +70°C

Humidity: 5%–80% non-condensing

Protection Class: IP20

Dimensions: 125 × 90 × 75mm (W×H×D)

Weight: ≈0.53kg

Interface & Configuration

Backplane: Modicon 300/Micro 84 series I/O bus connector

Input Terminals: Screw terminals (8 AC inputs + common)

Mounting: 19-inch rack or DIN rail (self-contained brackets)

Wiring: 0.5–2.5mm² copper wires; optional fanning strip for hot-swap

Key Features

8 Isolated AC Inputs: 115VAC channels with 1500VAC isolation for noise immunity

Harsh Environment Ready: Transient/surge protection for industrial floor conditions

Real-Time Status: Per-channel neon LEDs for immediate visual diagnostics

Compact & Rugged: LEXAN case with convection cooling (moisture resistance)

Legacy Compatibility: Direct fit for Modicon Micro 84 and 300-series racks

Applications

Systems: Modicon Micro 84, 300-series PLC systems

Industries: Material handling, packaging, textile machinery, process control

Use Cases: AC sensor/switch monitoring, 115VAC digital input acquisition, legacy system upgrades

Compatibility

Racks: Modicon 300-series 8/11-slot backplanes, Micro 84 chassis

CPUs: AS-9370-001, AS-984B-128, PC-E984-685

Software: Concept, ProWORX 32, P190

Status

Discontinued: Obsolete, no longer manufactured

Availability: Refurbished/used units with 1–2 year warranty