Does the Dual Relay Module T2 need an Aqara hub?

No. Aqara requires a Zigbee 3.0 hub, and the Zigbee radio on an EpiSensor Gateway fills that role, so Edge controls and reads the module without an Aqara hub or app.

Does it meter each channel separately?

No. It reports one power, current, voltage and energy value for the module. Use two modules, or a separate meter, when each load needs its own reading.

Can it drive a motor in both directions?

Yes, for motors up to 1 A and 1/4 HP. Turn on interlock first, so both relays can never be closed at once, as Aqara requires for bidirectional motors such as roller shades.

How much current can the two channels carry?

10 A in total, shared between the two channels, not 10 A each. Protect the circuit with a 10 A breaker.

Aqara Dual Relay Module T2 Zigbee dual relay module

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 15 values from it, listed under Interface.

Connect it with

Gateway ZGW-20
From €899 ex VAT Configure Gateway

Specifications

A jumper sets the contacts. With LIN linked to LOUT the relays switch the supply through to the loads on L1 and L2 (wet contacts). Without it they are volt-free contacts that can drive a motor controller, a garage door or another device's input, and a pulse mode closes them for 200 to 2,000 ms. Interlock stops both relays closing at once, which Aqara requires for bidirectional motors such as roller shades.^{2, 3, 4, 5}

Power: Mains. Powered from its N and L terminals at 100 to 250 V AC, or from a 24 to 60 V DC supply. Energy metering and the wall-switch inputs work only on AC.²
AC rating: 100 to 250 V, 50/60 Hz, 10 A maximum¹
AC loads: 2500 W incandescent; 1 A and 250 W LED or CFL; 1 A and 1/4 HP motor¹
DC rating: 24 to 30 V: 10 A, 300 W; 30 to 60 V: 1 A, 60 W (resistive)¹
Current limit: 10 A in total across both channels²
Channels: Two relays, wet or dry contact³
Switch inputs: S1 and S2 with COM, AC 85 V or above only⁴
Wireless: Zigbee, 2405 to 2475 MHz, 13 dBm maximum¹
Operating temperature: -10 to 40 °C¹
Operating humidity: 0 to 95 % RH, non-condensing¹
Dimensions: 45.5 × 48 × 24 mm¹
Mounting: Back box, behind a switch or on a DIN rail (adapter included)²
Upstream protection: 10 A overcurrent breaker³
Wire stripping: 6 to 8 mm³

Where it is used

Two small heating or ventilation loads, such as a towel rail and an extractor fan, switched from one module with their combined consumption metered.
HVAC energy monitoring for commercial buildings
A volt-free enable or start contact for plant, a door or a motor controller, using pulse mode where the equipment expects a momentary closure.
Two lighting circuits kept on their existing wall switches, with the module on a DIN rail in the distribution board.

Interface

Readings and settings, with units and ranges where Aqara publishes them. readable, readable and writable.⁵

Download

Reading	Unit	Range or values	Access
Measurements 5
PowerOne value for the module, not per channel	W	-	Read only
CurrentOne value for the module	A	-	Read only
VoltageSupply voltage	V	-	Read only
EnergyCumulative energy for the module	kWh	-	Read only
Switch inputA press on S1 or S2	-	`single_l1single_l2`	Read only
Controls 2
Relay 1	-	`ONOFFTOGGLE`	Read and write
Relay 2	-	`ONOFFTOGGLE`	Read and write
Settings 7
Work modeWet contacts, dry contacts with a pulse, or dry contacts	-	`powerpulsedry`	Read and write
Pulse lengthContact closure time in pulse mode	ms	200 to 2,000 ms	Read and write
InterlockStops both relays being on at the same time	-	`ONOFF`	Read and write
Channel 1 modeWhether S1 switches relay 1	-	`control_relaydecoupled`	Read and write
Channel 2 modeWhether S2 switches relay 2	-	`control_relaydecoupled`	Read and write
Switch typeThe kind of wall switch on S1 and S2	-	`togglemomentarynone`	Read and write
Power-on behaviourRelay state when power returns	-	`onpreviousofftoggle`	Read and write
Diagnostics 1
Internal temperature	°C	-	Read only

Power, current, voltage and energy are one set of values for the module, not one per relay. To meter two loads separately, use two modules or a separate meter.^5, 6

The work mode chooses between power (wet contacts), pulse (dry contacts closed for the pulse length) and dry (volt-free contacts). Settings live in Aqara's manufacturer-specific cluster, and the relays are standard Zigbee on/off endpoints, one per channel.^5, 6

In decoupled mode a wall switch on S1 or S2 no longer operates its relay and is reported as an action instead, so the switch can trigger something else in Edge.⁵

Setup

Wire it with the power off
Isolate the circuit and make sure a 10 A breaker protects it. Connect neutral to N and live to L. For wet contacts, link LIN to LOUT with the supplied jumper and connect the loads to L1 and L2. For dry contacts, wire the controlled device to L1, L2 and LOUT as Aqara's diagram shows. Wall switches go to COM, S1 and S2.⁴
Open pairing in Edge
In Edge, open pairing on the Gateway's Zigbee network, then switch the circuit back on.
Reset the module
Press and hold the module's button for 5 seconds, which Aqara documents as its reset, so the module is free to join the Gateway's network. Press gently; a tool can damage the button.³
Confirm the join
After a successful connection the indicator turns blue and flashes twice slowly. Check that Edge identifies it as the Aqara Dual Relay Module T2 (LLKZMK12LM).³
Set the mode, then test
Set the work mode and, for a two-direction motor, interlock before you connect the load. Then switch each relay from Edge and compare power with a load of known rating.

Common questions

Does the Dual Relay Module T2 need an Aqara hub?: No. Aqara requires a Zigbee 3.0 hub, and the Zigbee radio on an EpiSensor Gateway fills that role, so Edge controls and reads the module without an Aqara hub or app.⁴
Does it meter each channel separately?: No. It reports one power, current, voltage and energy value for the module. Use two modules, or a separate meter, when each load needs its own reading.^5, 6
Can it drive a motor in both directions?: Yes, for motors up to 1 A and 1/4 HP. Turn on interlock first, so both relays can never be closed at once, as Aqara requires for bidirectional motors such as roller shades.^1, 2
How much current can the two channels carry?: 10 A in total, shared between the two channels, not 10 A each. Protect the circuit with a 10 A breaker.^2, 3

Related devices

Sources

Dual Relay Module T2 specifications (opens in a new tab) Aqara
Dual Relay Module T2 (opens in a new tab) Aqara
Dual Relay Module T2 user manual (DCM-K01) (opens in a new tab) (PDF) Aqara
Dual Relay Module T2 installation guide (opens in a new tab) (PDF) Aqara
Aqara LLKZMK12LM device documentation (opens in a new tab) Zigbee2MQTT
Aqara LLKZMK12LM Zigbee definition (opens in a new tab) zigbee-herdsman-converters

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Aqara Dual Relay Module T2