TINYCONTROL tMEM Modbus Electricity meter

Tinycontrol tMEM

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, which provides 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.

• Indirect measurement using an easy-to-install current transformer (split-core)
• Bidirectional measurement with separate display of imported and exported energy
• Real-time reading via Modbus: voltage, current, power, frequency, energy
• Measurement accuracy corresponding to class B
• Monitor and current transformer are calibrated with a reference device
• Power supply 5-12 V DC (connector) or 5 V (USB)
• AC current measurement range 0-100 A at a nominal input voltage of 230 V
• Power measurement dead band 3-4 W
• Compact dimensions 74 × 40 × 30 mm (without DIN bracket) and weight of only 50 g

Default settings

The tMEM device is pre-configured with Modbus Slave ID: 1 and an auto-save interval of 600 seconds. The measured data, such as energy values, are saved in 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. Hold it longer - 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.

Power supply

• 5-12 V DC (connector)

• 5 V (USB)

Nominal AC input voltage: 230 V

AC current measurement range: 0-100 A

Power measurement deadband: 3-4 W

Interface

• Modbus RTU (RS-485)
• serial (via USB; 115200 baud)

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

Weight: 50 g

Measurement accuracy: class B

Accessories in the package: current transformer 100A/50mA