Model Interpretation

AS: Modicon Automation System

B855: 12VDC intrinsically safe input module

016: 16 input points

Technical Parameters

Input Points: 16 channels, sink/source compatible

Operating Voltage: 11.4–12.6VDC (nominal 12VDC)

Input Current (ON): ≥80mA per channel

Input Impedance (OFF): >100kΩ

Response Time: 1ms (ON→OFF / OFF→ON)

Backplane Power: 1.5mA @ +5V; no -5V used

Isolation: Intrinsically safe (Ex ia) for hazardous areas

Indicators: 16 LED status indicators (one per channel)

Operating Temp: 0°C to +60°C

Storage Temp: ‑40°C to +85°C

Dimensions: 50×119×125mm

Weight: ≈1.2kg

Origin: France

Interface & Configuration

Backplane: Modicon 800/984 I/O bus

Terminals: Screw terminals (16 inputs, common)

Terminal Connector: AS‑8534‑000

Wiring: 0.5–2.5mm² copper wires

Fusing: Per‑channel overcurrent protection

Core Functions

Intrinsically Safe Inputs: Certified for use in explosive atmospheres (Zone 0/1/2)

16‑Channel Monitoring: Captures 12VDC low‑level signals from sensors/switches

LED Status Display: Real‑time channel status for quick troubleshooting

High Noise Immunity: Optimized for industrial electrical noise environments

Applications

Systems: Modicon 800, 984, 300‑series PLCs

Industries: Oil & gas, chemical, pharmaceutical, food & beverage

Use Cases: Hazardous area limit switches, proximity sensors, 12VDC safety devices

Compatibility

Racks: Modicon 800/984 8/11‑slot backplanes

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

Software: Concept, ProWORX 32, P190