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Niobrara (EPE5-TCP-A) Ethernet Module PLC For Sale

Niobrara (EPE5-TCP-A) Ethernet Module PLC
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Niobrara (EPE5-TCP-A) Ethernet Module PLC:
$390.00

The item is a Niobrara R&D (NR&D) EPE5-TCP-A Ethernet Port Expander Module (also branded/referenced as EPE 5 PLUS), a specialized industrial communication gateway/expander designed primarily for legacy Square D / Schneider Electric SY/MAX PLC systems.⁠


Key Features & Specifications


  • Form Factor: SY/MAX-style rack-mountable module (approx. 1.5" wide x 13" tall x 6.5" deep, ~2.7–4 lbs in enclosure). Rugged welded steel construction.

  • Ethernet Port: 10Base-T (RJ45) supporting:

  • Modbus/TCP

  • SY/MAX 802.3 Ethernet protocol

  • Simultaneous operation of both protocols

  • BOOTP/DHCP for IP configuration

  • 128-entry I/O scanner table

  • Serial Ports (on the EPE5-TCP-A / -T variants): 4x RS-422/485 ports (DB9 female, SY/MAX pinout) with TX/RX LEDs per port. Supports baud rates from 50 to 19,200, various parity/stop bits, configurable bias/termination, handshaking, and multidrop (2- or 4-wire).

  • Indicators: Ethernet (Act, Err, Link, Collision), per-port TX/RX, module (Active, Busy, Error).

  • Advanced Capabilities:

  • Acts as a Modbus Master/Slave Gateway to Ethernet.

  • SY/MAX Ethernet NIM (Network Interface Module) emulator for interconnecting PLCs over Ethernet.

  • Protocol converter between Modbus/TCP and SY/MAX Ethernet ("Transparent Ready" bridge without replacing old hardware).

  • POWERLOGIC power monitoring bridge (supports up to 128 devices).

  • Data concentrator with 2,048 mailbox registers.

  • Serial protocol converter, radio master, PLC programming access point, and more.

  • Multiple serial port modes (18+ options including SY/MAX, Modbus RTU/ASCII, Transparent, Gateway, etc.).

  • Power: 5VDC @ 1.5A (from SY/MAX backplane or external NRK2 rack/power supply).

  • Configuration: Via PC software (EPE5SW/EPE5SW32), registers (changeable on-the-fly), stored in capacitor-backed RAM, EEPROM, or FLASH. Firmware dir="ltr" style="margin-top:0; margin-bottom:0;">Note on variants: The -TCP-A typically featured an AUI Ethernet port in earlier revisions, The unit in the photos is the front-panel version with 4 serial ports + Ethernet expander labeling


    Common Applications


    • Modernizing legacy SY/MAX systems with Ethernet connectivity (Modbus TCP integration into DCS/SCADA).

    • Bridging older serial devices/PLCs (SY/MAX, Modicon, POWERLOGIC, etc.) to Ethernet networks.

    • Data concentration, protocol translation, and multi-master networking in industrial automation.

    • Radio networks, PLC programming over shared connections, and troubleshooting.
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    Niobrara (EPE5-TCP-A) Ethernet Module PLC picture

    Niobrara (EPE5-TCP-A) Ethernet Module PLC

    $390.00


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