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        • Lifecycle Status

          Discontinued / Obsolete by OEM
          Stocking hard-to-find obsolete safety hardware, Apter Power provides fully tested HIMA legacy components to maintain the secure and uninterrupted operation of your industrial safety loops.

        F7546

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        1001 reviews ｜ Need a Specific Revision?
        HIMA F7546 is a bus termination module for H41q, H51q, and HIQuad systems, providing the required termination at the I/O bus boundaries to support reliable communication between connected I/O subracks.
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        Warranty Policy
        We provide 1 year warranty for all remaining parts.
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        Return Notice
        The warranty period is one year from the date of shipment, unless otherwise stated in the parts description. We guarantee that the project will not exhibit functional defects that may occur under normal operating conditions during the warranty period.
        In the event of a defect, we will send new equipment, repair equipment or refund the purchase price based on our availability. You must contact us to obtain a return authorization and return the defective device to us within 14 days of reporting the defect.
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        Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.Various transportation options are available in each country. Shipping methods and fees are clearly indicated on all quotations.
        Parts Availability
        Apter Power offers a wide range of components, products and services related to industrial automation. We also supply new products from a variety of quality manufacturers.
        How to order
        We have been working hard to update our inventory. If we have stock or parts available for new factory purchases, you can contact the order online. If we do not currently have an inventory, the displayed quantity will show "Ask". Please create an online quote or contact us by phone, fax or email to check availability.

        Technical specifications for F7546

        • Manufacturer:
          HIMA
        • Part Number:
          F7546
        • Product Family:
          HIMA HIQuad® X
        • Product Type:
          Bus Termination Module
        • Stock:
          1
        • Input Voltage Range:
          18V DC to 36V DC (nominal 24V DC)
        • Maximum Output Current:
          6.3 A
        • Power Consumption:
          2.5W (typical)
        • Isolation Voltage:
          500V AC (bus to I/O)
        • Humidity:
          5-95% RH (non-condensing)
        • System Family:
          HIMA H41q / H51q / HIQuad
        • Operating Temperature Range:
          -20°C to +60°C
        • Weight:
          0.01 kg
        • Estimated shipping dimensions:
          6.8x2x1.3cm
        • 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 Specifications Installation Control Application Scenarios

        Features:

        • Provides dedicated I/O bus termination at the required beginning and end points of connected subrack arrangements.
        • Integrates with the F 7553 coupling module and BV 7032 data cable architecture for structured communication between I/O subracks.
        • Supports H41q, H51q, and HIQuad system configurations with 500 V AC bus-to-I/O isolation and operation across the specified industrial temperature and humidity ranges.
        In industrial automation systems, reliable communication between central equipment and distributed I/O hardware depends on a correctly arranged bus structure. HIMA F7546 contributes to that structure by providing the termination required for the I/O bus. Proper termination supports the intended communication path across interconnected I/O subracks. The module therefore serves a focused but important role within H41q, H51q, and HIQuad system architectures.

        Multi-subrack control installations require both physical interconnection and defined bus boundaries. HIMA F7546 addresses the termination side of the arrangement, while F 7553 coupling modules provide the I/O bus connection at the subrack and BV 7032 data cables link individual subracks at the rear. The combination creates an organized path between the I/O level and the central device. Such an arrangement is particularly relevant where multiple I/O subracks must operate as part of one coordinated control system.

        From an installation perspective, HIMA F7546 offers straightforward integration into the specified I/O bus architecture without introducing an additional communication layer. The module operates within an 18 V DC to 36 V DC range and accommodates industrial environments from -20°C to +60°C. A 5% to 95% non-condensing humidity range further supports use in control cabinets and industrial equipment rooms. With a maximum output current of 6.3 A, typical consumption of 2.5 W, and 500 V AC bus-to-I/O isolation, the module combines the required termination function with electrical characteristics suited to compatible HIMA installations.

        The F7546 HIMA Bus Termination Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
        HIMA F7546 Bus Termination Module Manuals,Datasheets,Link 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.
        HIMA F7546 Bus Termination Module Specs

        General

        • Manufacturer HIMA
        • Model F7546
        • Condition New Original ready stock
        • Product Family F7553,F7131,F7133
        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.
        • Start and End Node Positioning: Must be precisely inserted into the start and end terminal slots (e.g., XD.1 or XD.2 interfaces) of the HIMA I/O expansion rack communication link.
        • Rail and Backplate Compatibility: Supports standard DIN 35mm rail mounting, and can also be directly locked to the metal backplate of the control cabinet via dedicated mounting holes.
        • Cold Insertion and Removal Safety and Secure Fixation: Vertical insertion and removal must be performed only after the system is completely powered off. After cable connection, manually tighten the anti-loosening screws on both sides to withstand long-term vibration.
        • Small Size and Compact Layout: The hardware adopts a compact and ultra-thin form factor of 100mm × 50mm × 20mm, saving valuable rack space inside the Safety Instrumented Cabinet (SIS).
        • Impedance Matching and Reverse Reflection Limitation: The module integrates a precision physical terminating resistor to absorb reflected waves from the bus end, preventing distortion and packet loss in the serial data waveform.
        • Dual-Channel Redundant Interlocking: Natively supports two independent physical channels, working with the HIMA master control card to achieve end-to-end dual-channel redundant communication and fault isolation.
        • Strict Voltage and Current Limiting: When the bus voltage fluctuation exceeds the 17.5V DC - 36.5V DC boundary, it automatically triggers undervoltage/overvoltage logic cutoff in conjunction with the master card.
        • High-Reliability Logic Transparency: As a purely hardware-level bus impedance conditioning unit, it is completely transparent to the upper-level control program, requiring no software driver development.
        • Large Chemical Plant ESD Cabinet: Deployed at the end of multiple distributed I/O expansion racks in the Emergency Stop System (ESD), ensuring error-free transmission of the safety interlock bus throughout the plant.
        • Oil and gas wellheads and long-distance pipelines: Installed in highly distributed Remote Terminal Unit (RTU) racks, overcoming signal attenuation over complex long-distance communication lines through stable impedance.
        • Boiler Combustion Management System (BMS): Serving as the terminator for multi-rack communication within the boiler trip protection circuits of large power plants, ensuring zero false trips at SIL3 level.
        • Replacement of aging H41q/H51q systems: As original equipment manufacturer (OEM) standardized spare parts for HIMA's classic safety systems, used for local network expansion during major overhauls of aging chemical systems worldwide.
        Description
        The HIMA F7546 bus termination module forms part of the I/O bus arrangement used with HIMA H41q, H51q, and HIQuad systems. Within an I/O subrack, connection to the I/O bus is handled through the F 7553 coupling module installed in slot 17. Communication between individual I/O module subracks is established at the rear through the BV 7032 data cable, while the bus itself is integrated into the bus board of the I/O module subracks.

        For a complete multi-subrack configuration, the HIMA F7546 provides the termination required by the I/O bus. Depending on the rack arrangement, an F 7546 module is plugged into the appropriate bus connector at the bus boundary, including the XD .2 connector of the last I/O module subrack. In configurations requiring termination at both bus boundaries, F 7546 modules are installed at the beginning and the end of the I/O bus. The arrangement works together with the F 7553 coupling module and BV 7032 data cable to maintain the intended bus connection throughout the I/O level.

        The HIMA F7546 operates from an 18 V DC to 36 V DC input range with a nominal supply of 24 V DC and supports a maximum output current of 6.3 A. Typical power consumption is 2.5 W, while the specified isolation voltage between the bus and I/O is 500 V AC. The module supports operation from -20°C to +60°C and relative humidity from 5% to 95% without condensation, making the termination function suitable for industrial control installations operating within the specified HIMA system environment.
        Alternative Names
        F 7546 F7553 F7131 F7133 F8626 F8621A F8651 F8625
        Technical notes
        The HIMA F7546 is an essential bus termination module engineered for legacy H41q and H51q systems, providing precise impedance matching to eliminate signal reflections. This hardware placeholder ensures rock-solid 2-channel redundant communication across high-speed internal I/O networks without introducing programming overhead.
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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.
        VIEW ALL FAQS
        What role does HIMA F7546 perform in an I/O bus configuration?
        HIMA F7546 terminates the I/O bus at the required bus boundary, helping complete the bus arrangement used between connected I/O module subracks.
        How does HIMA F7546 work with the F 7553 coupling module?
        The F 7553 provides the I/O bus connection for the I/O subrack and is installed in slot 17, while HIMA F7546 performs the bus termination function at the required bus boundaries.
        Can HIMA F7546 be used with BV 7032 data cable connections?
        Yes. BV 7032 data cables establish the bus connection between individual subracks at the rear side, and HIMA F7546 terminates the resulting I/O bus arrangement.
        Where should HIMA F7546 be installed in a multi-subrack system?
        For the described I/O bus arrangement, termination is provided at the bus boundaries. An F 7546 can be plugged into the XD .2 connector of the last I/O module subrack, while configurations requiring termination at both ends use termination modules at the beginning and end.

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