TINYCONTROL tMEM - Modbus Electricity Meter

Innovative solution for online monitoring of electricity consumption with Modbus RTU interface.

tMEM is a single-phase bidirectional electricity meter designed to connect to LK4 devices, providing a comprehensive solution for monitoring electricity consumption in real time. Thanks to its bidirectional function, it can measure both consumed and exported energy, which is ideal for installations with photovoltaic systems. Exported power is indicated by a "-" sign.

The device is supplied with a 100A/50mA current transformer , with which it is calibrated to ensure accurate measurements. The electricity meter allows for event settings to optimize energy consumption in commercial, industrial and residential areas.

Default settings
The tMEM device is pre-configured with Modbus Slave ID: 1 and an auto-save interval of 600 seconds. Measured data, such as energy values, are saved to non-volatile memory at this interval. This default setting suits most standard installations.

Quick Modbus address configuration
To find out the current address, simply click the button once - the LED will flash to indicate the address (e.g. 2 flashes = address 2). To set a new address, press and hold the button. After 2 seconds, the LED will flash once. Continue holding - the LED will flash once per second up to five times. Release the button after the number of flashes corresponding to the desired address.

Integration with LK
tMEM integrates seamlessly with LK4 and LK3.5+ devices. It can be powered directly from the LK controller using its 5V and GND outputs. Then connect it - either alone or together with other Modbus devices - to the LK Modbus A+ and B- terminals to establish communication.

BASIC SPECIFICATIONS

Power supply: 5-12 V DC (connector), 5V (USB)

Rated AC input voltage: 230 V

AC current measurement range: 0-100 A

Power measurement deadband: 3-4 W

Interface: Modbus RTU (RS485), Serial (via USB; 115200 baud)

Dimensions: 74 × 40 × 30 mm (without DIN bracket)

Weight: 50g

Measurement accuracy: class B

Accessories included: current transformer 100A/50mA