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Small metal box with one RJ45 port and terminal block serial connections

PUSR

PUSR TCP232-306 RS232 RS485 RS422 Device Server

SKU CH-TC4M-CJAWX

Connects RS232, RS485 or RS422 serial equipment to Ethernet networks with Modbus RTU-to-TCP gateway and watchdog reliability

  • TypeRS232 RS485 RS422 to Ethernet Converter
  • Converts RS232, RS485 and RS422 serial data to Ethernet networks
  • ARM Cortex-M0 processor at 48 MHz runs an optimised TCP/IP stack for low latency
  • Modbus RTU to Modbus TCP gateway with multi-host polling for industrial integration
  • 10/100 Mbps Ethernet port with auto MDI/MDIX simplifies cabling
  • Hardware and software watchdog restarts the unit automatically if it hangs

What It Is

The PUSR TCP232-306 is a new serial-to-Ethernet device server that converts RS232, RS485 or RS422 signals to a 10/100 Mbps network link. It runs on an ARM Cortex-M0 core at 48 MHz with a hardened TCP/IP stack and supports Modbus RTU-to-TCP conversion for industrial automation and IIoT integration.

Who It Suits and Who It Does Not

Engineers needing one serial interface at a time with DHCP or static IP addressing and multi-host Modbus polling will find it fits. It does not suit installations that require simultaneous RS232, RS485 and RS422 operation or that need gigabit Ethernet throughput for high-bandwidth data logging.

Deciding Specification

The single serial port handles RS232, RS485 or RS422 but only one mode operates at any moment, with baud rates from 600 to 230.4 Kbps. If your application demands concurrent multi-protocol serial traffic, this unit cannot meet that requirement.

Highlights

  • Converts RS232, RS485 and RS422 serial data to Ethernet networks
  • ARM Cortex-M0 processor at 48 MHz runs an optimised TCP/IP stack for low latency
  • Modbus RTU to Modbus TCP gateway with multi-host polling for industrial integration
  • 10/100 Mbps Ethernet port with auto MDI/MDIX simplifies cabling
  • Hardware and software watchdog restarts the unit automatically if it hangs

Specifications

BrandPUSR
ModelRS232 RS485 RS422 to Ethernet
TypeRS232 RS485 RS422 to Ethernet Converter

Questions about this item

What serial cable type do I need to connect my RS485 device to the TCP232-306?

Use a standard RS485 cable with the appropriate connector for your device; the unit provides an RS485 serial port supporting baud rates from 600 to 230.4 Kbps.

Will the TCP232-306 pass traffic to my legacy RS232 equipment while also serving RS485 nodes on the same network?

The serial port handles RS232, RS485 or RS422 one at a time, so you must choose which interface is active; it cannot serve RS232 and RS485 simultaneously.

How can I verify the gateway is converting Modbus RTU to Modbus TCP correctly after wiring it up?

Connect to the web interface or use a Modbus TCP client to poll a register; successful responses confirm the RTU-to-TCP conversion and multi-host polling are working.

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