Atac Technology Co., Ltd.

Modbus - Serial - Ethernet - WiFi - Fiber - Digital IO - Analog IO

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Modbus TCP to RTU/ASCII, RS232/422/485*1 - Model: PM-230

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Model: PM-230


CPU: 32-bits ARM7 Winbonds CPU , 80 MHz

RAM: 8 M Bytes SDRAM

ROM: 4 M Bytes Flash ROM

OS: uClinux OS

Ethernet: RJ-45 Connector, 10/100 Mbps (Auto Detect)


  • TCP Master to RTU Slave
  • TCP Master to ASCII Slave
  • RTU Master to TCP Slave
  • ASCII Master to TCP Slave

TCP Master to RTU/ASCII Slave:
8 simultaneous TCP user connection and polling, 244 serial chained RTU/ASCII Slave.
32 simultaneous Request for each TCP Master.

RTU/ASCII Master to TCP Slave:
8 simultaneous TCP user connection and polling (mapped via user defined Slave ID range)

Note: 0 and 245~255 are not recommended for use as Slave ID if you are not sure if these numbers are already used or not as ID in your environment. Because usually 0 is used for broadcast and 245~255 are used for else special purpose.

Utility: Built-in Web server Setup, Easy Operation

  • Mode: TCP Server / TCP Client / UDP
  • Setup: HTTP Browser Setup (IE & Netscape) , Console
  • Security: Setup Password
  • Protection: Built-in 1.5KV Magnetic Isolation

Serial Port

  • Port: RS-232 * 1 Port or RS-422/RS-485 * 1 Port ( software select)
  • Speed: 300 bps ~ 230.4 Kbps
  • Parity: None, Odd, Even, Mark, Space
  • Data Bit: 5, 6, 7, 8
  • Stop Bit: 1, 2
  • RS-232 Pins: Rx, Tx, GND, RTS, CTS, DTR, DSR, DCD
  • RS-422: Rx+, Rx-, Tx+, Tx- (Surge Protect)
  • RS-485: Data+, Data- (Surge Protect)
  • Built-in RS-422/RS-485 Terminal Resistor
  • 15KV ESD for all signals

Watch Dog Function

Power: DC12V, 1A

Led Lamp: SYS (PWR), LAN, LED 1, LED 2 ( User Define )

Operating Temperature: 0ºC ~ 70ºC

Storage Temperature : -10ºC ~ 80ºC

Dimension: 100 * 90 * 25 mm ( W * D * H )

Weight: 140g

Support DIN-Rail or Wall mount

RoHS: Compliant with RoHS

Regulatory Approvals: EMC: FCC Class A, CE Class A

Warranty: 1 year

Slave mode Setup


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Master mode Setup


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