EtherDNP-R Ethernet DNP-3 Gateway

DNP-3/IP (TCP or UDP) to DNP-3 Serial Gateway

  • Serial DNP to ethernet
  • Enable DNP3 communications over ethernet
  • Configuration via Browser, telnet or serial port
  • Enable serial DNP-3 devices to communicate with a DNP/TCP or DNP/UDP host computer... a DNP UDP server or DNP TCP server for serial RTUs
  • SNMP agent functionality
  • Protocol aware: minimum configuration needed
  • Two serial ports that each support RS-232, RS-422, RS-485 2 or 4 wire
  • RS-422/485 version with optical isolation available
  • 10 or 100 Mbps ethernet
  • RS-232 interface speeds to 230 Kbps
  • RS-485 Bus mastering for two independent poll strings
  • DIN Rail or wall mounting
  • RoHS Compliant
  • Industrial temperature rated -40 to +70 C


Indicators (front panel)
Lan Connection
Data Port

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How To Order



The gateway allows serial DNP-3 RTUs to communicate and interoperate with DNP/IP (either TCP or UDP) based controllers. The DNP-3 standard protocol is an asynchronous protocol designed to connect directly to computer asynchronous ports. DNP-3 has been extended to operate over ethernet using the IP protocol suite. This gateway converts between the DNP-3 IP protocol and DNP-3 Serial protocols transparently.

Normal operation would consist of one or more ethernet based computers functioning as DNP-3 host and one or more DNP-3 slave devices (usually RTUs) connected serially to the gateway.

The EDNP-3 enables one or more DNP-3 ethernet based controllers to communicate with DNP-3 based serial RTUs. It will not allow DNP-3 IP RTUs to operate with a serial DNP-3 controller.

By using RS-485, multiple DNP-3 slave devices may be connected to each of the two serial ports on the EDNP-3. If using RS-232, one DNP-3 slave device may be connected to each serial port.

The EDNP-3 is designed for mounting on a standard DIN rail, or for direct mounting on a wall. For easy connection to your LAN, the gateway supports 10BaseT or 100BaseT , half or full duplex with auto-sensing or pre-configuration.

For other applications (point-to-point direct RS-232 links or point-to-multiple point "dialed" links via ethernet ) see the EtherPath single port serial server. The EtherPath uses TCP/IP.

A companion product, the EtherPoll is appropriate for applications using other protocols. The EtherPoll is protocol independent, and requires no knowledge of the RTU protocol. This allows it to work with any asynchronous byte-oriented protocol with no additional configuration. The EtherPoll uses UDP/IP. It's data sheet is here.

The EtherGate is another companion product that is protocol-aware (both Modbus and DNP-3). It enables serial SCADA devices to communicate via an ethernet network. The EtherGate is ideal for transporting SCADA protocols via ethernet. To transport SCADA protocols over Frame Relay circuits (without ethernet), use the DCB BPF Scada-FRAD.




Four LEDs indicate LAN and port status


Data Port


LAN Connection

Interface: 10/100BaseT autoselected


Front view
RS-232/422/485 Connector

Rear view
LAN Connectors

Front view of Isolated Version




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Item Number Description Price Buy Now!
EDNP-3 ROHS EtherDNP3; Dual Port RS-232/422/485 DNP3-UDP/TCP to serial DNP-3 gateway
(5-30VDC and 120 VAC power supply)
$695 Qty:
EDNP-3 ROHS-I EtherDNP3; Dual Isolated RS-422/485 Port DNP3-UDP/TCP to serial DNP-3 gateway
(5-30VDC and 120 VAC power supply)
$795 Qty:
9501033 Optional 36-72 VDC Input Power Supply $ 75 Qty:
9501081 Optional 125 VDC Input Power Supply $ 125 Qty:
9902090 Optional DIN rail mounting clips $ 5 Qty:

Data Comm for Business Inc.
2949 County Road 1000 E
Dewey, Il 61840
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