D1MC

Hardware, connections, power and installation for the D1MC DIN-rail Smart Meter Adapter.

D1MC is a configurable DIN-rail Smart Meter Adapter for fixed indoor installations. It currently converts DSMR/P1 and HAN-NVE meter data locally to Modbus RTU.

Linky TIC hardware interface present. Software support is planned and not yet available. Do not select or commission Linky TIC as a current firmware v2 meter source.

Connections and pin-out

D1MC screw-terminal groups and terminal order, viewed from the front.

The colors group terminals by purpose: blue identifies the Linky TIC/S0 signal terminals, red identifies 5 V and ground or reference terminals, and orange identifies the Modbus RTU data pair.

Group	Terminal	Description
Linky TIC/S0 — blue	I2	Galvanically isolated signal input 2; use depends on the installed firmware
Linky TIC/S0 — blue	I1	Galvanically isolated signal input 1; use depends on the installed firmware
Power — red	GND	Ground connection for the 5 V supply group
Power — red	GND	Second ground connection for the 5 V supply group
Power — red	5 V	Input for an additional regulated 5 V supply
Modbus RTU — orange	A+	Modbus RTU data line A
Modbus RTU — orange	B-	Modbus RTU data line B

The Linky TIC/S0 terminals are physically present. Linky TIC software support is planned and not yet available in firmware v2. Do not infer a current Linky wiring procedure from the hardware pin-out alone.

Controls and interfaces

D1MC front controls and interfaces.

Label	Feature	Description
SMR/P1	Smart-meter input	RJ12 input for DSMR/P1 meters. HAN-NVE uses the same input with the appropriate optional adapter cable.
BUTTON	Local control	Short press to reboot; press for more than 5 seconds to restore factory settings; hold while applying power to enter download mode.
LED	RGB status LED	Shows operating state and diagnostics. Firmware v2 can adjust its brightness; see LED indicators.
USB	USB-C connection	Additional 5 V power, local Device Manager connection and firmware updates. Use a USB data cable for configuration and updates.

D1MC has no P1 output. It has software-controlled 120 Ω Modbus RTU termination, enabled by default.

Power options

Meter interface	Power requirement
DSMR/P1 version 5	5 V through the P1 connection, USB-C or the 5 V screw terminal
DSMR/P1 version 2 or 4	External regulated 5 V through USB-C or the 5 V screw terminal
HAN-NVE	External regulated 5 V through USB-C or the 5 V screw terminal
Linky TIC/S0 hardware	External regulated 5 V through USB-C or the 5 V screw terminal

Average consumption is 90 mA at 5 V. The power manager has a 500 mA protection limit; this is not the normal operating current.

Installation

D1MC is intended only for a dry indoor installation. Installation in or near electrical distribution equipment must be performed in accordance with applicable local rules by a person competent to do so.

1. Mount D1MC on the DIN rail with the installation de-energized.

2. Connect the supported meter interface:

   • connect a DSMR/P1 meter to the P1 input; or

   • connect HAN-NVE to the P1 input using the appropriate adapter cable.

3. Connect a regulated external 5 V supply when required by the table above.

4. Connect Modbus RTU using the labels on the screw terminal and the connected controller manufacturer's wiring instructions.

5. Apply power and connect through USB-C to the Device Manager.

6. Select the meter source and configure Modbus RTU in Configuration.

7. Confirm whether the default enabled 120 Ω termination is appropriate for D1MC's position on the RS485 bus.

Do not connect or commission the Linky TIC/S0 terminal as a current meter source until supported firmware and its installation instructions are published.