Model Interpretation

AS: Modicon Automation System

B837: 16‑point 24VAC/DC universal input module

016: 16 points, 2×8 common groups, enhanced AC/DC rating

Technical Parameters

Inputs: 16 channels, 24VAC/DC, 2 groups ×8

Operating Voltage:

AC: 20–27VAC, 47–63Hz

DC: 19–30VDC

Max Input Voltage: 27VAC / 30VDC (continuous); 32VAC / 36VDC (surge)

Input Current (ON): 40mA typical @24V

Input Impedance: ≤1kΩ (ON); ≥15kΩ (OFF)

Response Time:

OFF→ON: ≤6ms

ON→OFF: ≤18ms

Isolation: Optical coupling, 1500VAC channel‑to‑backplane

Backplane Power: +5V 40mA; +4.3V 1mA

Operating Temp: 0°C to +60°C

Storage Temp: -40°C to +85°C

Humidity: 5%–95% non‑condensing

Weight: ≈1.0kg (2.2lbs)

Dimensions: 50×119×125mm

Origin: France

Interface & Configuration

Backplane: Modicon 800/984 I/O bus

Terminals: Screw terminals (16 inputs, 2 common groups ×8)

Indicators: 16 LEDs (ON when input active)

Fuses: 1 internal non‑replaceable fuse per group

Wiring: 0.5–2.5mm² copper wires

Terminal Connector: AS‑8534‑000

Core Functions

Universal AC/DC Input: Works with 24VAC or 24VDC signals for mixed‑sensor environments

Dual Common Groups: 2×8 isolated groups for flexible wiring and fault containment

Optical Isolation: Protects PLC from field‑side noise, surges, and ground loops

LED Status: Individual channel LEDs for quick visual diagnostics

Wide Voltage Tolerance: Accepts ±15% voltage variation for unstable field supplies

Applications

Systems: Modicon 800, 984, 300‑series PLCs

Industries: Material handling, packaging, textile machinery, general automation

Use Cases: 24VAC/DC proximity sensors, limit switches, pushbuttons, relay contacts, safety interlocks

Compatibility

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

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

Software: Concept, ProWORX 32, P190