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QIACHIP KR2402A Instruction Manual DC 5V-60V 433MHz RF Remote Control Switch 2-CH Relay Receiver

QIACHIP KR2402A Product Diagram.webp

Version: V1.0

Last Updated: 2025-06-24

Model: KR2402A

Product Size

QIACHIP KR2402A Size Figure.webp

  • Receiver Length (L) × Width (W) × Height (H): 68mm × 48mm × 20mm
  • Housing Length (L) × Width (W) × Height (H): 75mm × 54mm × 25mm
  • Receiver hole horizontal spacing: 60mm; Vertical spacing: 42mm; Hole Diameter: Ø5mm

Component description

QIACHIP KR2402A Component Description Figure.webp

  • 1: Learning button
  • 2: Indicator light
  • 3: Antenna
  • +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

Wiring diagram

Disconnect power before wiring.

Figure 1

QIACHIP KR2402A Wiring Diagram 2.webp

Figure 1: Wiring diagram for lamps

  • Load: lamps

  • Input Power: DC 5V-60V

Figure 2

QIACHIP KR2402A Wiring Diagram 3.webp

Figure 2: Wiring diagram for AC motors

  • Load: AC motors
  • Input Power: DC 5V-60V
  • External power supply: 1V-250V

Figure 3

QIACHIP KR2402A Wiring Diagram 4.webp

Figure 3: Wiring diagram for DC motors

  • Load: DC motors
  • Input Power: DC 5V-60V

Function description and setting method

(1) Momentary mode; (2) Toggle mode; (3) Latching mode; (4) Reset function.

NOTE

  • When you use the first and second working modes, a remote control with at least two buttons is required.
  • When you use the third working mode, a remote control with at least three buttons is required.
  • When pairing a second remote, you don't need to press the button on the receiver 8 times again to reset it.
  • Once the receiver and transmitter are paired and a working mode is selected, the receiver will retain this mode even if powered off and on again.
  • The following working modes require the use of QIACHIP brand remote controls (transmitters) and controllers (receivers/wireless remote control switches). Compatibility with other brands is not guaranteed

(1) Momentary mode

In this mode:

  • Press and hold the remote control button (such as A), and the corresponding relay on the receiver is turned on.
  • Release the remote control button (such as A), and the corresponding relay on the receiver will turn off.

How to set momentary mode

Step 1

Click the learning button of the receiver once. The indicator light on the receiver turns off and the receiver enters the setting state.

Step 2

Press the button on the remote control (such as A) once. The indicator light on the receiver will flash and then turns off.

Step 3

After the indicator light goes out, press another button (such as B) on the same remote control. The indicator light on the receiver will flash and then turn on. The momentary mode is set successfully.

(2) Toggle mode

In this mode:

  • Press the remote control button (such as A), and the corresponding relay on the receiver will turn on.
  • Press the remote control button (such as A) again, and the corresponding relay on the receiver will turn off.

How to set toggle mode

Step 1

Click the learning button of the receiver twice. The indicator light on the receiver turns off, and the receiver enters the setting state.

Step 2

Press the button on the remote control (such as A) once. The indicator light on the receiver will flash and then turns off.

Step 3

After the indicator light goes out, press another button (such as B) on the same remote control. The indicator light on the receiver will flash and then turn on. The toggle mode is set successfully.

(3) Latching mode

In this mode:

  • Press the remote control button (such as A), and the corresponding receiver’s relay A is turned on.
  • Press the remote control button (such as B), and the receiver’s relay B is turned on, and the receiver’s relay A is turned off.

How to set latching mode

Step 1

Click the learning button of the receiver three times. The indicator light on the receiver turns off, and the receiver enters the setting state.

Step 2

Press the button on the remote control (such as A) once. The indicator light on the receiver will flash and then turns off.

Step 3

After the indicator light goes out, press another button (such as B) on the same remote control. The indicator light on the receiver will flash and then turn on. The latching mode is set successfully.

(4) Reset function

  • When the KR2402A receiver is reset, all paired transmitters will be unpaired and can no longer control the receiver.

How to Reset

Click the learning button on the receiver 8 times. The reset is complete when the indicator light flashes and then turns off.

Electrical characteristics

Parameter Value
Input voltage DC 5-60V
RF frequency 433.92MHz
Standby current 8.5 mA
Rated Load Max 1100W
Receiver sensitivity -108dBm
Operation mode Momentary mode/Toggle mode/Latching mode
Working temperature -10℃~70℃
Size 68x48x18mm

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