Hima F3237 Digital Input Module

• Brand
  Hima
• Model
  F3237
• Product Name
  8‑Channel Safety‑Related NAMUR Digital Input Module
• Place of Origin
  Germany
• HS Code
  8537101190
• Dimensions
  128 mm × 100 mm × 22 mm
• Weight
  0.14 kg
• Operating Temperature
  -20℃ to +60℃
• Storage Temperature
  -40℃ to +85℃
• Power Supply
  24 VDC
• Warranty
  12 month
• Product Status
  new and original

HIMA F3237 Input / Output

Model: F3237

Module Type: 8-channel safety-grade NAMUR digital input module without physical field output channels

Input

Channel quantity: 8 galvanically-isolated input channels

Signal standard: NAMUR per DIN 19234

Logic-0 current: 0.35 mA … 1.2 mA

Logic-1 current: 2.1 mA … 6.0 mA

Wire-break detection threshold: ≤ 0.28 mA

Short-circuit detection threshold: ≥ 6.5 mA

Maximum per-channel line impedance: ≤ 50 Ω

Maximum cable length: 1000 m (0.5 mm² conductor)

Internal shunt resistor: 681 Ω, 1 %, 0.25 W

Typical response time: 10 ms

Output

No field-side physical outputs.

Internal backplane communication output: transfers input status and safety diagnostic data to the HIMA rack CPU over the system backplane bus.

Module Power Consumption

5 VDC: 90 mA

24 VDC: 170 mA

Diagnostic Features

Per-channel continuous monitoring for wire breakage and short-circuit faults

Built-in automatic tests including channel crosstalk check, walking-0 test and input-circuit self-diagnosis

SIL 3 certified for safety-instrumented system applications

HIMA F3237 Application Scenarios

Typical Field Device Connections

NAMUR proximity switches

NAMUR limit switches and valve position feedback sensors

NAMUR emergency-stop push-buttons

NAMUR safety interlock switches

Relay outputs from NAMUR flame and gas detectors

Industry and System-Level Applications

ESD Emergency Shutdown System (Oil & Gas, Petrochemical)

Gathers safety discrete signals for well-head assemblies, process units and offshore installations. It monitors emergency-stop commands, valve position feedback and safety switch states to initiate safe process shutdown when hazardous conditions arise.

F&G Fire and Gas Protection System

Receives status feedback from NAMUR-type flame, combustible-gas and toxic-gas detectors, and executes fire-gas interlock logic within the safety instrumented system.

BMS Burner Management System (Power Plants, Refinery Heaters)

Captures flame-detector relay signals and safety interlock switch status to deliver safety supervision for furnaces and boilers.

Chemical Process Safety Interlock

Monitors reactor safety limit switches, tank high- / low-level NAMUR switches and local emergency-stop units. It detects wire-break and short-circuit faults within safety instrumented loops.

Safety Protection for Critical Rotating Machinery

Interfaces safety interlock switches of compressors, turbines and large-scale process equipment to realize safety-guard interlock functions.

Safety-Oriented Factory Automation

Serves high-risk manufacturing facilities for safety-door interlocks and safety limit switches, suitable for SIL 3 safety instrumented loops.