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Master ModBUS RTU Wireless

The KET-RMB-211 can handle up to 32 ModBUS RTU slave devices connected to its RS485 port. The device can be programmed to read a set of registers and send them to the Gateway.

The integrated Repeater functionality reduces the number of required nodes and increases network reliability.

Is equipped with an extended radio range that allows to reach over 1000 m in free air.

The standard antenna connector supports 90° joint antennas or cabled ones for placement outside the electrical panel.

Maximum flexibility of power supply, direct from the mains or low voltage, both DC and AC.

Format suitable for mounting in electrical panel on DIN-rail.


Protection Range IP50
Operative Temperature -20 ÷ +60 °C
Dimensions 53,5 x 110 x 61 mm (W x H x D)
Mounting DIN rail or Wall mounting with supplied supports
Required DIN modules 3 DIN modules
Electric Board Type Industrial or switchboard
Material Blend PC/ABS sel extinguishing UL94-VO
Supply Voltage 12 ÷ 24 VDC, 12 ÷ 20 VAC; 230 VAC with integrated power supply
Consumption < 1.5 W @ 12 ÷ 20 VAC / < 1.5 W @ 12 ÷ 24 VDC / < 1.5 W @ 230 VAC
Connectors types Screw terminal
Supported Protocols Master ModBUS RTU with 32 slave
Connectors types Screw terminal
Supported Protocols X-Monitor Protocol (X-MP) / IEEE 802.15.4 / ZigBee™ Pro 2.0
Radio Frequency 2.4 GHz ISM Band
Output Power +3 ÷ +20 dBm
Sensitivity -104 dBm
Antenna Type RPSMA connector, 90° antenna supplied
Max Distance (Free Air) Over 1000 m
Radio Signal Indicator Integrated (LinkQuality)
Output Power Adjustment From local keyboard and remotely
Firmware Upgrade Via radio
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