Skip to content

QIACHIP KR0548-4CH Instruction Manual DC 7-48V WIFI Ewelink Smart Remote Control Switch 4-CH Relay Receiver

QIACHIP KR0548-4CH Product Diagram.webp

Version: V1.0

Last Updated: 2026-02-11

Model: KR0548-4CH

Product Size

QIACHIP KR0548-4CH Size Figure.webp

  • Receiver Length (L) x Width (W) x Height (H): 63mm x 48mm x 17mm

Component Description

QIACHIP KR0548-4CH Component Description Figure.webp

  • 1: Type‑C 5V input
  • 2: Indicator light
  • 3: Learning button
  • V+: Positive input terminal
  • V-: Negative input terminal
  • NO1: Normally open terminal of relay1
  • COM1: Common terminal of relay1
  • NC1: Normally closed terminal of relay1
  • NO2: Normally open terminal of relay2
  • COM2: Common terminal of relay2
  • NC2: Normally closed terminal of relay2
  • NO3: Normally open terminal of relay3
  • COM3: Common terminal of relay3
  • NC3: Normally closed terminal of relay3
  • NO4: Normally open terminal of relay4
  • COM4: Common terminal of relay4
  • NC4: Normally closed terminal of relay4

Wiring Diagram

Disconnect power before wiring.

Figure 1

QIACHIP KR0548-4CH Wiring Diagram 1.webp

Figure 1: Wiring diagram for Lamp

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

Figure 2

QIACHIP KR0548-4CH Wiring Diagram 2.webp

Figure 2: Wiring diagram for DC motors

  • Load: DC motors
  • Input Power: DC 7V-48V

Figure 3

QIACHIP KR0548-4CH Wiring Diagram 3.webp

Figure 3: Wiring diagram for Lamp (Type-C 5V Power Input)

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

Step 1

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

Step 2

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

Step 3

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

QIACHIP KR0548-4CH Pairing with Ewelink APP Figure1.webp

Step 4

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

QIACHIP KR0548-4CH Pairing with Ewelink APP Figure2.webp

Compatible Pairing Mode

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

Step 1

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

Step 2

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

QIACHIP KR0548-4CH Compatible Pairing Mode Figure1.webp

Pairing with RM2.4G remote control

Offline Pairing

Step 1

Press learning button on receiver twice in quick succession.

Step 2

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

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

Pairing within APP

Step 1

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

QIACHIP KR0548-4CH Pairing with RM2.4G remote control Figure1.webp

Step 2

Simply operate according to prompts.

QIACHIP KR0548-4CH Pairing with RM2.4G remote control Figure2.webp

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 63x18x17mm

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.