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Five small green circuit boards with RJ45 ports and pin headers

Vszerda

Vszerda USR-K7 TTL UART to Ethernet Module 5PCS

SKU CH-PSTD-SYNHV

Pack of five serial-to-Ethernet modules with ARM Cortex-M4 processor, 10/100 Mbps RJ45, Modbus RTU/TCP gateway and auto-reconnect

  • Transparent data transfer between network and TTL serial via ARM Cortex-M4 processor
  • Virtual COM enables legacy serial devices to communicate over TCP/IP networks
  • Automatic dead-link detection and reconnection prevents data loss during outages
  • Modbus RTU to TCP gateway with polling mechanism reduces data congestion
  • Configure once via software or web interface and settings save permanently

Purpose & Audience

The Vszerda USR-K7 is a TTL UART to Ethernet module that provides transparent data transmission between a network and a serial port. It is built around an ARM Cortex-M4 processor and supports Modbus RTU to Modbus TCP conversion for industrial automation tasks. The pack contains five identical modules for multi-point deployments.

Setup Checklist

Verify that your serial device uses TTL-level signalling and that the target network runs at 10 or 100 Mbps via an RJ45 connection. Configuration is performed once through the supplied software or the built-in web page and then stored permanently in the module. Ensure the firmware version is 3009 or higher to enable the Modbus gateway polling mechanism.

Fit & Alternatives

This pack suits engineers adding Ethernet connectivity to legacy serial equipment or building Modbus gateways for factory networks. Buyers who need wireless links, higher Ethernet speeds, or a single unit for bench testing should consider other options.

How it compares

Measured against everything we stock in Tech Gadgets & Accessories, at today’s prices. Recalculated every night.

Price $137.99
Pricier than about 90% of the 5,998 comparable items (median $24.99).

Specifications

No published specifications for this item yet.

Questions about this item

Does the 5PCS pack include cables or a power supply for the USR-K7 modules?

The pack contains five USR-K7 modules with RJ45 ports. A power supply and Ethernet cables are not included and must be sourced separately.

Which firmware version should I look for to use the Modbus gateway polling feature?

The Modbus gateway polling mechanism that prevents data congestion is available on firmware version 3009 or higher.

What network speed will the USR-K7 actually deliver when connected to a 10/100 Mbps switch?

The module negotiates at 10 or 100 Mbps over the RJ45 port, so throughput is limited to standard Fast Ethernet rates in a real installation.

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