QIACHIP KR1204 Instruction Manual DC 12V 433MHz RF Remote Control Switch 4-CH Relay Receiver

Version: V1.0

Last Updated: 2025-07-27

Model: KR1204

Product Size

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

1: Indicator light
2: Antenna
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

Figure 1: Wiring diagram for lamps

Load: lamps
Input Power: DC 12V

Figure 2

Figure 2: Wiring diagram for AC motors and Lamps

Load: AC motors and Lamps
Input Power: DC 12V
External power supply: 1V-250V

Figure 3

Figure 3: Wiring diagram for DC motors and Lamps

Load: DC motors and Lamps
Input Power: DC 12V

Function description and setting method

Normal Modes:

(1) Momentary mode

(2) Toggle mode

(3) Latching mode

(4) Reset function

Combination Modes:

(5) 2CH Momentary mode + 2CH Toggle mode

(6) 2CH Momentary mode + 2CH Latching mode

(7) 2CH Toggle mode + 2CH Latching mode

(8) 2CH Latching mode + 2CH Latching mode

NOTE

When using the KR1204 model receiver, at least one remote control with four 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 on 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. 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 on, 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. 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 corresponding 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 on, 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. The latching mode is set successfully.

(4) Reset function

When the KR1204 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.

(5) 2CH Momentary mode + 2CH Toggle mode

In this mode:

The Momentary mode channels (Channel 1, Channel 2) and Toggle mode channels (Channel 3, Channel 4) operate independently. Activating or deactivating a relay in one mode has no impact on the state of relays in the other mode

For the two channels set to Momentary mode (Channel 1 and Channel 2):

Press and hold the remote control button corresponding to relay channel 1 (such as A), and relay channel 1 on the receiver will turn on; release button A, and relay channel 1 will turn off.
Press and hold the remote control button corresponding to relay channel 2 (such as B), and relay channel 2 on the receiver will turn on; release button B, and relay channel 2 will turn off.

For the two channels set to Toggle mode (Channel 3 and Channel 4):

Press the remote control button corresponding to relay channel 3 (such as C), and relay channel 3 on the receiver will turn on; Press the remote control button C again, and relay channel 3 will turn off.
Press the remote control button corresponding to relay channel 4 (such as D), and relay channel 4 on the receiver will turn on; Press the remote control button D again, and relay channel 4 will turn off.

How to set 2CH Momentary mode + 2CH Toggle mode mode

Step 1

Click the learning button of the receiver four times. The indicator light on the receiver turns on, 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. The 2CH momentary mode + 2CH toggle mode is set successfully.

(6) 2CH Momentary mode + 2CH Latching mode

In this mode:

The Momentary mode channels (Channel 1, Channel 2) and Latching mode channels (Channel 3, Channel 4) operate independently. Activating or deactivating a relay in one mode has no impact on the state of relays in the other mode

For the two channels set to Momentary mode (Channel 1 and Channel 2):

Press and hold the remote control button corresponding to relay channel 1 (such as A), and relay channel 1 on the receiver will turn on; release button A, and relay channel 1 will turn off.
Press and hold the remote control button corresponding to relay channel 2 (such as B), and relay channel 2 on the receiver will turn on; release button B, and relay channel 2 will turn off.

For the two channels set to Latching mode (Channel 3 and Channel 4):

Press the remote control button corresponding to relay channel 3 (such as C), and relay channel 3 on the receiver will turn on;
Press the remote control button corresponding to relay channel 4 (such as D), and relay channel 4 on the receiver will turn on, while relay channel 3 turns off simultaneously.

How to set 2CH Momentary mode + 2CH Latching mode

Step 1

Click the learning button of the receiver five times. The indicator light on the receiver turns on, 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. The 2CH momentary mode + 2CH latching mode is set successfully.

(7) 2CH Toggle mode + 2CH Latching mode

In this mode:

The Toggle mode channels (Channel 1, Channel 2) and Latching mode channels (Channel 3, Channel 4) operate independently. Activating or deactivating a relay in one mode has no impact on the state of relays in the other mode

For the two channels set to Toggle mode (Channel 1 and Channel 2):

Press the remote control button corresponding to relay channel 1 (such as A), and relay channel 1 on the receiver will turn on; Press the remote control button A again, and relay channel 1 will turn off.
Press the remote control button corresponding to relay channel 2 (such as B), and relay channel 2 on the receiver will turn on; Press the remote control button B again, and relay channel 2 will turn off.

For the two channels set to Latching mode (Channel 3 and Channel 4):

Press the remote control button corresponding to relay channel 3 (such as C), and relay channel 3 on the receiver will turn on;
Press the remote control button corresponding to relay channel 4 (such as D), and relay channel 4 on the receiver will turn on, while relay channel 3 turns off simultaneously.

How to set 2CH Toggle mode + 2CH Latching mode

Step 1

Click the learning button of the receiver six times. The indicator light on the receiver turns on, 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. The 2CH toggle mode + 2CH latching mode is set successfully.

(8) 2CH Latching mode + 2CH Latching mode

In this mode:

The Latching mode channels (Channel 1, Channel 2) and Latching mode channels (Channel 3, Channel 4) operate independently. Activating or deactivating a relay in one mode has no impact on the state of relays in the other mode

For the two channels set to Latching mode (Channel 1 and Channel 2):

Press the remote control button corresponding to relay channel 1 (such as A), and relay channel 1 on the receiver will turn on;
Press the remote control button corresponding to relay channel 2 (such as B), and relay channel 2 on the receiver will turn on, while relay channel 1 turns off simultaneously.

For the two channels set to Latching mode (Channel 3 and Channel 4):

Press the remote control button corresponding to relay channel 3 (such as C), and relay channel 3 on the receiver will turn on;
Press the remote control button corresponding to relay channel 4 (such as D), and relay channel 4 on the receiver will turn on, while relay channel 3 turns off simultaneously.

How to set 2CH Latching mode + 2CH Latching mode

Step 1

Click the learning button of the receiver seven times. The indicator light on the receiver turns on, 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. The 2CH latching mode + 2CH latching mode is set successfully.

Electrical characteristics

Parameter	Value
Input voltage	DC 12V
RF frequency	433.92MHz
Standby current	5 mA
Rated Load	Max 120W per channel (4 channels total)
Receiver sensitivity	-104dBm
Normal Modes	Momentary mode; Toggle mode; Latching mode; Reset function;
Combination Modes	2CH Momentary mode + 2CH Toggle mode; 2CH Momentary mode + 2CH Latching mode; 2CH Toggle mode + 2CH Latching mode; 2CH Latching mode + 2CH Latching mode;
Working temperature	-10℃~80℃
Size	68x48x20mm

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