ZigBee to Modbus USB gateway, ZC-GW-USB-EM

The ZC-GW-USB-EM is a Modbus USB to ZigBee gateway. It is an interface between a PLC or PC to a ZigBee network.

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Product variants

Article Number Product Name
0414-ZC-GW-USB-EM + ZC-GW-USB-EM + Request quote
ZigBee gateway Modbus USB


The Gateway Modbus USB is part of the family of 4-noks wireless ZigBee devices. Its purpose is to be an interface between a Personal Computer and the network of 4-noks ZigBee devices using an universal standard protocol such as Modbus/RTU via USB port. The use of Modbus protocol guarantees an immediate use of many commercials SCADA for PCs. The device is supplied directly from the USB port. Its role in the ZigBee network is Coordinator: i.e. it forms an active part in creating the network and maintaining wireless traffic from and to other similar devices. Furthermore it can function as “parent” device for battery sensors of the same family and saves data that they asynchronously send regardless of Modbus requests.
If connected with the bridge ZR-BR-485-EM, this gateway offers a full transparent Modbus channel.

Key features:

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


General characteristics:
  • Chip Ember EM2420
  • Compatible IEEE 802.15.4
  • Stack EmberZnet 3.5.x (ZigBee PRO)
  • Modbus/RTU
Radio characteristics:
  • Frequency: 2405 MHz ÷ 2480 MHz
  • Modulation: DSSS
  • Nominal transmission power: 1mW (0 dBm)
  • Reception sensitivity: -92 dBm
  • Extern antenna Gain: 5,5 dB
  • Coverage outdoor/indoor: 100m/30m
Power supply:
+5 Vdc from USB; 50mA
USB 2.0
Wall mounted / DIN-rail
Environmental conditions:
  • Operating temperature: -10°C to +60°C; <80% U.R. not condensing
  • Storage temperature: -20°C to +70°C; <80% U.R. not condensing
Degree of protection:
Community Directives 2006/95/CE, 89/336/EEC, 99/5/EEC; ETSI EN 300-328; ETSI EN 301-489; EN60950-1; EN50371; EN61000-6-2; EN 61000-6-3

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