Modbus RS485 to High Powered Wireless System Gateway


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Modbus RS485 to High Powered Wireless System Gateway in Wall Mounting Enclosure with Antenna, 12/24Vdc Supply (External Plug-Top PSU Included)

The Gateway Modbus RS485 is part of the family of 4-noks wireless ZigBee devices. Its purpose is to be an interface between a PLC (Programmable Logic Control) or a Personal Computer and the network of 4-noks ZigBee devices using an universal standard protocol such as Modbus/RTU via RS485 serial interface. The use of Modbus protocol guarantees an immediate use of all commercial PLC and many SCADA for PCs.

Its role in the ZigBee network is Coordinator: i.e. it forms an active part of creating the network and maintaining wireless traffic from and to other similar devices. Furthermore it can function as parent device for battery powered sensors of the same family and saves data that they asynchronously send regardless of Modbus requests. In conjunction with the bridge ZR-BR-485-EM, this gateway offers a transparent Modbus channel.

In wall mounting enclosure with antenna, 12/24Vdc supply (external plug-top PSU included)

Key Features

  • Protocol converter from Modbus/RTU to ZigBee
  • Standard Modbus RS485 interface
  • Coordinator function for a ZigBee network
  • Local memory stores battery powered sensors data
  • Transparent bridge towards other Modbus devices
  • External antenna

General Characteristics

  • Chip Ember EM2420
  • Compatible IEEE 802.15.4
  • Stack EmberZnet 3.5.x (ZigBee PRO)
  • Modbus/RTU

RF Characteristics

  • Frequencies 2405 MHz ÷ 2490 MHz
  • Modulation: DSSS
  • Nominal Transmission Power: 1mW (0 dBm)
  • Reception Sensitivity: -92 dBm
  • Extern Antenna Gain: 5,5 dB
  • Coverage Outdoor/Indoor: 100m/30m

Supply: 12-24 Vdc/Vac (±10%); 100mA; 50/60Hz

Connections: RS485 with pull out terminals (3,81 mm pitch)

Environments Parameters

  • Operating Temperature: -10 ÷ +60°C; < 80% U.R. not condensing
  • Storage Temperature: -20 ÷ +70°C; < 80% U.R. not condensing
  • Degree of Protection: IP50

Compliant with 2006/95/EEC, 89/336/EEC, 99/5/EEC directives.
Reference Norms:

  • ETSI EN 300 328: Radio Compatibility for digitals wide band transmissions
  • ETSI EN 301 489: Radio Compatibility
  • EN 61000-6-2: Electromagnetic Compatibility – Emissions
  • EN 61000-6-3: Electromagnetic Compatibility – Immunity
  • EN 60950-1: Electric Safety


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