F3237
F3237
F3237
F3237
F3237
F3237
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F3237

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HIMA F3237 is an eight-channel SIL 3 digital input module for NAMUR proximity switches and resistor-wired safety sensors with line monitoring.
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Technical specifications for F3237

  • Manufacturer:
    HIMA
  • Part Number:
    F3237
  • Product Family:
    HIMA HIQuad H41q/H51q
  • Product Type:
    8-Channel Safety-Related Digital Input Module
  • Stock:
    1
  • Input channels:
    8
  • Supported sensors:
    NAMUR proximity switches and resistor-wired safety sensors
  • Safety capability:
    AK 1 through AK 6 / SIL 3
  • Line diagnostics:
    Short-circuit and wire-break monitoring
  • Typical switching time:
    Approximately 10 ms
  • Zero-signal current:
    0.35 to 1.2 mA
  • One-signal current:
    2.1 to 6.0 mA
  • Wire-break threshold:
    0.28 mA or below
  • Short-circuit threshold:
    6.5 mA or above
  • Maximum line impedance:
    50 Ω
  • Maximum line length:
    1000 m with 0.5 mm² conductor
  • Sensor supply:
    8.2 V
  • Specified shunt:
    681 ohm, 1%, 0.25 W
  • Shunt part number:
    00 0751681
  • Space requirement:
    4 SU
  • Backplane supply:
    5 VDC at 90 mA
  • Field supply load:
    24 VDC at 170 mA
  • Cable-plug type:
    Z 7108/3237/C
  • Dimensions:
    2 x 19 x 12.8 cm
  • Weight:
    0.15 kg
  • Tariff Code:
    8538900000
  • Country of origin:
    Germany
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Loop Preparation Diagnostic Strategy Replacement Verification Application
  • Eight safety-related field-input channels
  • NAMUR and resistor-wired sensor compatibility
  • Automatic monitoring of open and shorted field lines

F3237 combines sensor-state acquisition with electrical supervision, allowing the controller to distinguish a valid process signal from common field-wiring failures.

Successful replacement depends on reproducing the complete loop design, including resistors, cable impedance, software evaluation and the defined safe reaction for every monitored input.

Commissioning should verify the normal sensor states first and then prove open-circuit and short-circuit detection on every channel without bypassing the approved safety response.

Availability, condition, price, and shipping time for F3237 are confirmed during quotation.

HIMA F3237 8-Channel Safety-Related Digital Input Module Manuals, Product Family, Links

Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

  • Document each sensor type and resistor-wiring arrangement
  • Confirm the cable route and conductor condition before reconnection
  • Preserve the approved function-block assignment for every channel
  • Treat controller diagnostics as the primary acceptance source
  • Investigate sensor-line faults with measured loop current
  • Verify the configured plant response to each detected wiring fault
  • Match the module revision and complete front label
  • Compare the cable plug and channel map with the project drawing
  • Prove normal and faulted loop conditions before returning to service
  • NAMUR proximity-switch acquisition in emergency shutdown systems
  • Resistor-wired sensor monitoring in fire and gas systems
  • Line-supervised safety inputs for burner and process protection
Description
F3237 connects eight safety-related NAMUR proximity switches or resistor-wired sensor circuits to a HIQuad controller. It monitors each field line for short circuit and wire break while supporting requirement classes AK 1 through AK 6.

The module performs automatic operating tests covering channel switching, crosstalk, input filters, internal function and sensor-line faults. Its current thresholds distinguish normal zero and one states from open- and short-circuit conditions.

A replacement must preserve the resistor network, loop impedance, cable plug and software function block. Commissioning should prove normal operation and both diagnostic fault states on every connected channel.
Alternative Names
HIMA F3237 HIMA F 3237 F3237 F 3237 HIMA HIQuad F3237
Technical notes
HIMA F3237 requires matched revision, NAMUR or resistor-wired loops, Z 7108/3237/C wiring and approved fault reactions; incorrect termination can create false diagnostics or defeat line monitoring.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
Can HIMA F3237 accept an ordinary dry contact without a resistor network?
Use only the sensor circuit documented for F3237. A dry contact needs the approved resistor wiring so the module can distinguish valid states from wire break and short circuit.
Why does HIMA F3237 report a line fault even though the sensor changes state?
Measure the loop current and inspect the resistor values, cable resistance, terminal condition and sensor supply; a changing device can still fall outside the documented diagnostic thresholds.
Should unused channels on HIMA F3237 be left open?
Unused inputs referenced by the HIMA function block must be terminated as documented, rather than left open, so permanent wire-break diagnostics do not interfere with system operation.
Can HIMA F3237 be replaced without checking its hardware revision?
No. Match the F3237 type, valid hardware revision, cable plug, sensor wiring and software block because a physically similar module can have different approved behavior.
Why can an HIMA F3237 LED appear normal while diagnostics still require attention?
The manufacturer states that the input LEDs are not included in the automatic self-test. Use controller diagnostics and measured loop conditions, not the LED alone, for acceptance.
What must be saved before removing HIMA F3237?
Record the channel-to-sensor map, resistor scheme, cable plug, configured safety reaction, function-block assignment and normal diagnostic state before disturbing the module.
How should HIMA F3237 be commissioned after replacement?
Prove each normal zero and one state, then simulate an open circuit and short circuit under the approved test procedure and verify the controller's configured safety response.