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      FEN-21 68679303

      ABB FEN-21 Resolver and TTL Encoder Interface Module
      In Stock
      Ships by Friday, August 28
      Fast Shipping Available

      Product Describe：

      ABB FEN-21 is a resolver and TTL incremental-encoder interface for compatible ABB drives. It converts resolver sine/cosine or TTL A/B/Z pulses into drive speed and position feedback. It also supports TTL emulation, two position-latch inputs, and insulated PTC/KTY feedback. Requested code 68679303 needs an ABB label or order record; current ABB ID is 68805848.

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      Technical specifications Information Alternative names Technical notes FAQ

      Technical specifications for FEN-21 68679303

      Technical specifications for FEN-21 68679303

      • Manufacturer:
        ABB
      • Product Category:
        General Automation
      • Spare Part Number:
        68679303
      • Estimated shipping dimensions:
        6.2x10.7x3cm
      • Weight:
        0.1 kg
      • Tariff Code:
        8537101190
      • Counliy of origin:
        Sweden
      • Module type:
        Resolver and TTL encoder interface
      • Verified model:
        FEN-21
      • Current ABB public product ID:
        68805848
      • Requested numeric code:
        68679303 — identity relationship not confirmed in reviewed ABB public sources
      • Resolver input:
        Differential sine and cosine, 2 to 7 Vrms
      • Resolver excitation:
        4 to 12 Vrms AC, 1 to 20 kHz, maximum 100 mArms
      • Resolver performance:
        24-bit position resolution and 24-bit speed resolution
      • Resolver cable length:
        Maximum 100 m
      • Temperature sensor input:
        KTY84 or PTC through the resolver connector
      • TTL encoder input:
        A/B/Z differential RS-422/485, maximum 500 kHz, 1 to 65535 pulses/revolution with reference mark
      View as PDF Ask for Quote

      Information

      Information

      Overview Manuals Common Applications Product Precautions
      ABB FEN-21 is a drive feedback interface for a resolver and a TTL incremental encoder; ABB's current public product ID is 68805848, while requested code 68679303 is not corroborated in the reviewed ABB sources and remains on nameplate/order-record hold.
      • Module type: Resolver and TTL encoder interface
      • Verified model: FEN-21
      • Current ABB public product ID: 68805848
      • Requested numeric code: 68679303 — identity relationship not confirmed in reviewed ABB public sources

      Installed in a supported ABB drive option slot, it converts the resolver's excitation, sine, and cosine signals or the TTL encoder's A/B/Z pulse signals into position and speed feedback used by the drive control program; it can also accept PTC/KTY motor-temperature feedback and two digital position-latch inputs. The module provides software-adjustable resolver excitation from 4 to 12 Vrms at 1 to 20 kHz, accepts resolver sine/cosine levels of 2 to 7 Vrms, receives differential RS-422/485 TTL encoder signals up to 500 kHz, and provides a differential TTL encoder-emulation output with 1 to 65535 pulses per revolution and a reference mark. FEN-21 is paired with a compatible ABB drive, a documented resolver or TTL incremental encoder, shielded twisted-pair feedback cables, optional KTY84/PTC temperature sensor, and the correct firmware parameters in closed-loop motor-speed, position, and machinery-drive applications where the host drive manual explicitly lists FEN-21.

      Important Notice: Obtain a clear physical ABB label or exact ABB order record showing both FEN-21 and 68679303 before publishing that numeric relationship as confirmed.

      Apter Power FEN-21 - Requested Code 68679303 Verification Manuals and Guides

      Important Notice: The first link is the product-parameters PDF prepared only from the cited manufacturer information; the second link is the Apter Power product manual. Confirm the physical nameplate, current manufacturer documents, and host-system requirements before installation or replacement.

      Resolver motor feedback
      Supplies resolver excitation and processes sine/cosine rotor-angle signals for closed-loop speed and position control in a compatible ABB drive.
      TTL incremental encoder feedback
      Receives differential A/B/Z pulses for motor speed, direction, position, and reference-mark feedback.
      Encoder signal emulation
      Outputs a differential TTL A/B/Z emulation signal to a compatible receiving device when the engineered drive application requires shared feedback.
      Position capture and motor temperature
      Uses two digital latch inputs for position events and an insulated KTY84/PTC sensor for documented motor-temperature monitoring in machinery drive applications.
      Read and follow the current ABB documentation and host-equipment instructions before work. Verify the complete physical nameplate and system configuration.
      1
      Verify the physical ABB label and exact order record before associating requested code 68679303 with FEN-21; ABB's current public product ID is 68805848.
      2
      Confirm the exact ABB drive, firmware, option slot, resolver/encoder type, pulse count, excitation, and parameter support before installation.
      3
      Only qualified electrical personnel may work on the drive. Isolate drive mains and all external control circuits, wait the ABB-specified discharge time, and verify absence of voltage.
      4
      Select +5.5 V or +24 V encoder supply with the jumper before mounting. Remove the jumper if an external encoder supply or another FEN emulation output is connected; the wrong selection can damage the encoder.
      5
      Keep resolver excitation within 4 to 12 Vrms at 1 to 20 kHz and verify that sine/cosine amplitudes remain within 2 to 7 Vrms for the exact resolver transformation ratio.

      Alternative Names

      Alternative Names

      ABB FEN-21 ABB FEN 21 ABB 68679303 ABB 68805848

      Technical notes

      Technical notes

      Verification Status: MODEL_VERIFIED; REQUESTED_NUMERIC_CODE_NOT_CORROBORATED_IN_REVIEWED_ABB_PUBLIC_SOURCES; NAMEPLATE_OR_ORDER_RECORD_HOLD Exact Mapping: ABB's current public product page identifies FEN-21 as product ID 68805848, and ABB's current FEN-21 manual verifies the model and function. The reviewed ABB public sources did not directly map requested number 68679303 to FEN-21. Do not describe 68679303 as a verified current or former ABB product ID without a matching ABB nameplate or official order record. Lifecycle Status: ABB maintains a current FEN-21 product page and a 2024 Rev E manual. The cited exact sources do not assign an Active, Classic, Limited, or Obsolete phase. Do not invent a lifecycle label for either FEN-21 or requested code 68679303. Country Of Origin: Not published for requested code 68679303 in the cited ABB sources; do not guess. Dimensions: ABB drawing: 106 mm overall height and 63 mm depth, with 31 mm and 26 mm indicated profile widths. Preserve the drawing labels rather than presenting an unsupported single-width W x H x D statement. Weight: Not published in the cited current ABB manual or product page. Obtain a clear physical ABB label or exact ABB order record showing both FEN-21 and 68679303 before publishing that numeric relationship as confirmed. Do not silently replace 68679303 with current product ID 68805848 or assert that one formally supersedes the other without the ABB record. Do not confuse FEN-21 with FEN-01, FEN-11, or FEN-31; their supported feedback technologies differ. Verify the exact drive type, hardware revision, firmware, option slot, resolver/encoder, excitation, supply selection, and temperature-sensor insulation before installation. A confirmed relationship between requested code 68679303 and FEN-21 That 68679303 was formally replaced by 68805848 Country of origin Customs tariff or HS code Weight A single W x H x D set that ignores the two profile-width dimensions in the ABB drawing A named ABB lifecycle phase Compatibility with a drive or firmware not explicitly documented Safe isolation for a motor temperature sensor Absolute position capability beyond the documented resolver/TTL feedback architecture Safety encoder, SIL, or PL capability Stock, warranty, condition, or lead time

      FAQS

      • What is ABB FEN-21?
        It is a feedback interface module for a resolver, a TTL incremental encoder, TTL encoder emulation, two position-latch inputs, and an optional PTC/KTY temperature signal.
      • Is 68679303 officially verified as the FEN-21 product ID?
        Not from the reviewed ABB public sources. ABB's current public FEN-21 record uses product ID 68805848, so 68679303 requires a matching ABB nameplate or order record.
      • What resolver signals does FEN-21 handle?
        It supplies 4-to-12-Vrms, 1-to-20-kHz excitation and receives differential sine and cosine signals of 2 to 7 Vrms.
      • Which TTL encoder signals are supported?
        Differential RS-422/485 A, B, and Z signals up to 500 kHz, with 1 to 65535 pulses per revolution and a reference mark.
      • Can FEN-21 power the TTL encoder?
        Yes. A jumper selects +5.5 V or +24 V. The exact encoder voltage/current and cable drop must be checked, and the jumper must be removed when an external supply is used.
      • Does FEN-21 provide an encoder output?
        Yes. It provides differential TTL A/B/Z encoder emulation up to 500 kHz with 1 to 65535 pulses per revolution and a reference mark.
      • How many position-latch inputs are available?
        Two 24 V digital latch inputs.
      • Can it read motor temperature?
        It supports a KTY84 or PTC sensor through the resolver connector, but only when double or reinforced insulation separates the sensor from live motor parts.
      • Which drives are compatible?
        ABB requires checking the exact drive ordering information or hardware manual; do not infer compatibility from the FEN-21 model name alone.
      • What is the maximum module power consumption?
        ABB specifies 350 mA at 24 V, with a maximum combined consumption of 5 W for encoders, latch circuits, and cabling.
      • What is the protection rating?
        IP20; the host drive cabinet and installation provide the required environmental protection.
      • Is FEN-21 officially Active or Classic?
        The cited ABB sources do not print a named lifecycle phase. A current product page and 2024 manual exist, but no Active, Classic, Limited, or Obsolete label should be invented.
      Trusted by 5,000+ plants worldwide | Backed by our vast inventory of top-tier control parts, modules and cards, fast shipments are dispatched to cover your urgent needs. ABOUT US >>
      Disclaimer: We are not an authorized distributor or distributor of the product manufacturer of this website, The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because our company is not an authorized distributor of this product, the Original Manufacturer`s warranty does not apply.While many DCS PLC products will have firmware already installed, Our company makes no representation as to whether a DSC PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. Our company also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from our company, its distributors, or any other source. Our company also makes no representations as to your right to install any such firmware on the product. Our company will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

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