ZG-485

Gateway ModBus RS485 - ZigBee

ZG-485

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.
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The use of Modbus protocol guarantees an immediate use of all commercial PLC and many Scada for PC. Its role in the ZigBee network is Coordinator, i.e. it forms an active part of creating the network and maintaining wireless traffi c 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.

ZG-485
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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

Technical Specs

General characteristics Chip Ember EM2420
Compatible IEEE 802.15.4
Stack EmberZnet 3.5.x (ZigBee PRO)
Modbus/RTU
RF characteristics Frequency: 2405 MHz ÷ 2480 MHz
Modulation: DSSS
Nominal transmission power: 1mW (0 dBm)
Reception sensitivity: -92 dBm
External antenna Gain: 5,5 dBv Coverage outdoor/indoor: 100m/30m
Supply 12-24 Vcc/Vca (±10%);  100mA; 50/60Hz
Connections RS485 with pull out terminals (3,81 mm pitch)
Environmental parameters
 Operating temperature: -10 ÷ +60°C; <80% U.R. not condensing
Storage temperature: -20 ÷ +70°C; <80% U.R. not condensing
Degree of protection: IP 55
Approvals 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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