HIMA F3237 Safety Input Module: 8-Channel NAMUR Sensor Interface

The HIMA F 3237 safety input module provides reliable monitoring for critical industrial sensors. This eight-channel module connects safety-rated proximity switches and NAMUR sensors with precision. It continuously monitors all connected lines for short-circuits and wire breaks during operation. The F 3237 module supports requirement classes AK 1 through AK 6 for versatile applications. It delivers comprehensive self-testing capabilities and ensures operational safety in demanding environments.

Core Safety & Certification Specifications

• Brand: HIMA Safety Systems
• Model: F 3237 8-Channel Input Module
• Safety Standard: Compliant with DIN 19234 (NAMUR)
• Requirement Class: AK 1 to AK 6 comprehensive coverage
• Safety Rating: Suitable for safety instrumented systems
• Channel Count: Eight independent safety input channels
• Response Time: Approximately 10 milliseconds per channel
• Self-Testing: Continuous automatic diagnostic monitoring

Electrical Characteristics & Performance

• Supply Voltage: 8.2 VDC regulated sensor supply
• Current Consumption: 5V at 90 mA, 24V at 170 mA
• Line Impedance: Maximum 50 Ohms per DIN 19234
• Shunt Resistor: 681 Ohm, 1% tolerance, 0.25W rating
• Operating Temperature: -20°C to +70°C industrial range
• Storage Temperature: -40°C to +85°C extended capability
• Humidity Range: 5% to 95% non-condensing operation
• Vibration Resistance: 2G operational, 5G non-operational

Signal Monitoring & Threshold Values

• 0-Signal Range: 0.35 mA to 1.2 mA input current
• 1-Signal Range: 2.1 mA to 6.0 mA input current
• Wire Break Detection: Below 0.28 mA threshold
• Short-Circuit Detection: Above 6.5 mA threshold
• Input Filtering: Digital filtering for noise immunity
• Signal Accuracy: ±1% typical current measurement
• Update Rate: 100 Hz per channel sampling frequency
• Isolation: Channel-to-channel 500V AC isolation

Installation & Wiring Specifications

• Maximum Cable Length: 1000 meters with 0.5mm² wire
• Wire Gauge: 0.5mm² to 2.5mm² compatible
• Connection Type: Screw terminal block connections
• Space Requirement: 4 TE (Terminal Equipment units)
• Mounting: Standard DIN rail 35mm compatible
• Weight: Approximately 350 grams complete unit
• Certification: CE, UL, ATEX compatible design
• Enclosure Rating: IP20 for control cabinet installation

Compatibility & Sensor Support

• Sensor Types: NAMUR proximity switches per DIN 19234
• Resistor Sensors: Compatible with resistor-wired sensors
• Third-Party Sensors: Support for P&F and other brands
• Custom Configuration: 47 kΩ resistor option available
• Output Current: Configurable up to 170 μA minimum
• Software Block: HB-RTE building block integration
• System Integration: HIMA safety system compatibility
• Backplane Communication: Standard HIMA bus system

Packaging & Delivery Information

• Package Contents: One HIMA F 3237 input module unit
• Documentation: Installation guide and technical manual
• Shipping Options: FedEx, UPS, DHL express delivery
• Packaging: Industrial-grade protective materials
• Delivery Time: 3-5 business days for stock items
• Warranty Coverage: 12 months quality assurance

Technical FAQ

• What types of sensors does this module support?
  The module supports NAMUR proximity switches, resistor-wired sensors, and safety-rated proximity switches.
• How does the module detect wiring problems?
  It continuously monitors current levels to detect wire breaks below 0.28 mA and short-circuits above 6.5 mA.
• What is the maximum cable length supported?
  The system supports cable lengths up to 1000 meters using 0.5mm² wire gauge.
• Can I use non-NAMUR sensors with this module?
  Yes, with appropriate external resistors to adjust current levels for proper detection.
• What diagnostic features does the module include?
  It provides continuous self-testing including input filtering, cross-talk checking, and function verification.

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