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KV-LE21V

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KEYENCE KV-LE21V is an Ethernet communication unit for supported KV-8000, KV-7000, KV-5000 and KV-3000 Series PLC systems.
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Technical specifications for KV-LE21V

  • Manufacturer:
    KEYENCE
  • Part Number:
    KV-LE21V
  • Product Family:
    KEYENCE
  • Product Type:
    Ethernet Unit for KV Series PLCs
  • Stock:
    1
  • Network Function:
    Ethernet communication unit
  • Supported CPU Families:
    KV-8000 / 7500 / 7300 / 5500 / 5000 / 3000
  • Internal Current Consumption:
    80 mA maximum
  • Installation:
    Expansion unit in supported KV system
  • Regional Note:
    Order availability varies by region
  • Weight:
    0.12 kg
  • Estimated shipping dimensions:
    9.0 x 8.0 x 4.1 cm
  • Tariff Code:
    Please confirm the destination before shipping
  • Country of origin:
    Japan
  • 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 System Match Network Change Recovery Evidence Product Applications

Features:

  • PLC network expansion: The unit adds an Ethernet path without replacing the supported KV CPU platform.
  • Broad KV compatibility: Multiple current and legacy CPU families are listed, subject to system rules and firmware.
  • Serviceable configuration: Network data can be documented and restored during a planned module replacement.
KV-LE21V is used where a supported KEYENCE PLC needs Ethernet communication with supervisory, programming or peer equipment.

The hardware identity alone does not define the running network; IP addressing, protocol use, controller project and connected-device expectations remain site data.

Regional order restrictions may affect sourcing even though the exact model remains present in KEYENCE’s official product information.

Apter Power can help confirm the KEYENCE KV-LE21V Ethernet Unit for KV Series PLCs, supported CPU, slot plan, network configuration and regional supply scope before quotation.
KEYENCE KV-LE21V Ethernet Unit for KV Series PLCs 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.
  • CPU support: Confirm the exact KV processor appears in the official compatibility list.
  • Expansion rules: Check slot position, unit count and system current budget before installation.
  • Project version: Retain the programming software and firmware information used by the operating machine.
  • Protocol inventory: Identify every controller, HMI, server and service that uses the Ethernet path.
  • Address control: Reserve the intended IP settings and prevent a duplicate address during bench setup.
  • Project backup: Save the PLC program and network configuration before disturbing the installed unit.
  • Segmented test: Prove communications on a controlled network before connection to plant traffic.
  • Cyber boundary: Apply the site’s approved access, routing and change-management controls.
  • Link comparison: Record port indication, controller diagnostics and peer reachability before replacement.
  • Cable check: Verify patch lead, switch port and physical path so a network fault is not misdiagnosed as a module fault.
  • Service dependencies: Test HMI, programming, data collection and remote I/O functions separately.
  • Rollback plan: Keep the original unit and settings available until the replacement passes the complete machine test.
  • PLC programming access: Provides an Ethernet route to a supported KV controller.
  • HMI connectivity: Links operator interfaces to controller data within the approved network design.
  • Production data exchange: Supports authorized communication between the PLC and plant systems.
  • Legacy KV maintenance: Restores the installed Ethernet unit without replacing the complete controller platform.
Description
KV-LE21V adds Ethernet communication to supported KEYENCE KV control systems, providing a dedicated network interface between the PLC rack and connected industrial devices.

Compatibility for KV-LE21V spans specified KV-8000, KV-7500, KV-7300, KV-5500, KV-5000 and KV-3000 CPU families, so the exact CPU and firmware environment must be confirmed before installation.

KV-LE21V is listed by KEYENCE Japan as a current model, with regional purchasing conditions that can differ. Supply statements should therefore be separated from technical compatibility claims.
Alternative Names
KVLE21V KV LE21V
Technical notes
KV-LE21V installation can interrupt controller communications and expose duplicate network addresses if settings are copied blindly. Back up the PLC project and current network configuration, confirm the supported CPU and slot rules, isolate affected equipment, then commission on a controlled segment before reconnecting plant traffic or enabling remote commands.
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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.
A KV-LE21V replacement shows link lights but the HMI cannot communicate. What should be compared first?
Check IP address, subnet, protocol settings, controller project and switch path. Physical link proves only the Ethernet connection, not the configured service.
The CPU is from a KV family listed for KV-LE21V. Is compatibility automatic?
No. Confirm the exact CPU, expansion arrangement, firmware and project requirements. Family-level support still has system configuration boundaries.
A bench technician wants to connect KV-LE21V with the production IP while the old unit is online. Is that safe?
No. Use an isolated test segment or temporary controlled address to prevent a duplicate IP and unintended traffic to operating equipment.
KV-LE21V is visible on the Japan product site but unavailable through a local channel. Does that change its lifecycle?
Not by itself. Regional ordering restrictions affect supply route; the exact model remains technically listed as current by KEYENCE Japan.
After replacing KV-LE21V, programming access works but data collection fails. What should acceptance include?
Test every dependent service separately, including HMI, historian, peer messaging and maintenance access, against the documented network configuration.
A network outage affects KV-LE21V and several other devices. Should the PLC unit be replaced first?
No. Inspect the switch, power, uplink, addressing and common network events before replacing a single endpoint that may be responding to a shared failure.

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