QIACHIP KR0548-1CH Instruction Manual DC 7-48V WIFI Ewelink Smart Remote Control Switch 1-CH Relay Receiver

Version: V1.0

Last Updated: 2026-02-10

Model: KR0548-1CH

Product Size

Receiver Length (L) x Width (W) x Height (H): 53mm x 29mm x 17mm

Component Description

1: Type‑C 5V input
2: Indicator light
3: Learning button
V+: Positive input terminal

NO: Normally open terminal
COM: Common terminal
NC: Normally closed terminal
V-: Negative input terminal

Wiring Diagram

Disconnect power before wiring.

Figure 1

Figure 1: Wiring diagram for Lamp

Load: Lamp
Input Power: DC 7V-48V

Figure 2

Figure 2: For door access switches or switches of other devices

Input Power: DC 7-48V
Output switching signal, which can replace switches to control other devices.
Dry contacts: Potential-free contacts that act only as a switch to connect or disconnect external circuits.

Figure 3

Figure 3: Wiring diagram for Electromagnetic Lock

Load: Electromagnetic Lock
Input Power for Receiver: DC 7V-48V
Input Power for Access Control: DC 12V

Figure 4

Figure 4: Wiring diagram for Lamp (Type-C 5V Power Input)

Load: Lamp
Input Power for Receiver: Type-C 5V/0.5A

Pairing with Ewelink APP

Step 1

Connect your phone to 2.4GHz WIFI and turn on Bluetooth.

Step 2

Long press the learning button on the receiver for more than 6 seconds until the indicator light flashes twice quickly and then stays on once, and the WIFI pairing mode will be successfully activated.

Step 3

Open the Ewelink APP. Tap "+" to add a device in the top right corner of the screen, and enter the password of the connected 2.4G WIFI.

Step 4

Tap the icon of the device that appears to start the pairing process, and then wait until the pairing is completed.

Compatible Pairing Mode

If you fail to enter Quick Pairing Mode (Touch), please try "Compatible Pairing Mode" to pair.

Step 1

Long press the learning button on the receiver for more than 5 seconds until the LED indicator flashes twice rapidly and then remains on steadily. Then release the button. Long press the pairing button for 5 seconds again until the indicator flashes rapidly. Subsequently, the device enters the compatible pairing mode.

Step 2

Tap "+" and select "Compatible Pairing Mode" on the APP. Select Wi-Fi SSID with ITEAD-** and enter the password 12345678, and then go back to the eWeLink APP and tap "Next". Be patient until pairing completes.

Pairing with RM2.4G remote control

Offline Pairing

Step 1

Press the learning button on the receiver twice in quick succession.

Step 2

The pairing can be completed by pressing the button of the remote control to be paired again.

To delete the paired remote control buttons, you need to go to the "eWelink Remote" page in the App settings for deletion.

Pairing within APP

Step 1

Click on the added device, then click the settings icon in the upper - right corner, and then select "eWelink Remote".

Step 2

Simply operate according to the prompts.

Electrical characteristics

Parameter	Value
Input voltage	DC 7V-48V
Type-C Input	DC 5V/0.5A
WIFI frequency	IEEE 802.11 b/g/n 2.4GHz
Maximum Load Current	10A
Rated Load	Max 480W
Receiver sensitivity	-108dBm
Working temperature	-10℃~70℃
Size	53x29x17mm

Warning

The positive and negative terminal wires must not be reversed.
When using wireless electronic devices, avoid proximity to metal objects, large electronic equipment, electromagnetic fields, and other sources of strong interference.