The KET-MES-420 is a device with 4G-LTE modem, which, via the KET-IOI-100 photodetector, counts the pulses related to the consumption of energy drawn from and fed into the electricity grid, and can be configured via simple commands sent by SMS.
In addition, via the 4 digital inputs, the RS485 ModBUS RTU interface and the TCP/IP server it can interconnect with various industrial devices, such as PLCs, gateways, sensors, ect.
Ability to set multiple timers (second, minute, day, week, month) to perform actions, such as data uploading.
Equipped with an internal battery that lasts 8-20 hours, the modem enters 'sleep' mode in the event of a power failure.

GENERAL SPECIFICATIONS
Degree of Protection - IP30
Operating Temperature - -30 ÷ +70 °C
Relative Humidity - MAX 95% non-condensing

CONTAINER
Dimensions - 95 x 63 x 25 mm (W x H x D)
Fixing - Wall or bottom plate

POWER SUPPLY
Voltage 9 ÷ 28VDC (standard adapter: DC 12V/1.5A)
Consumption - 12 V input max. 150mA - average 50mA
Connectors - Screw terminals

UPS SECTION
Battery Type - Lithium Polymer 3.7V - 500mAh
Indicative Battery Life 8 - 20 hours

RS485 INTERFACE
Channels - 1
Protocols Supported - ModBUS RTU Slave
Communication Speed - 1200 to 115200 bps (default 9600)
Connector Type - Screw terminals

DIGITAL INPUTS
Channels - 4 per dry contact
Digital Inputs - Set as counter with count frequency (10-50Hz)

METERING FREQUENCY
Maximum error ±0.3% @ 30 ÷ 50 Hz; ±0.11% @ up to 30 Hz

MODEM SECTION -
Supported Protocols - FDD LTE (4G)
Antenna Type - SMA connector for GSM antenna
SIM Type - SIM card voice/data

Parameter Name	Parameter Value
Type	pulse
Technology	electronic
Applications	industrial residential
Communication	RS485 Modbus RTU
Protection level	IP30
Other characteristics	with 4G-LTE modem