SR-104A Serial Port Control 2-way Relay Module Delay Relay Single Chip Microcomputer Controller Finished Board

Description:

The improved SR-104 module adopts patch technology and supports 5V or 9-12V input voltage. The pull-in and release of two relays are controlled by serial command, and each channel is independently set with a delay of 1 ~ 255 seconds. The operation is simple, and most serial instructions only need 1 byte to realize their functions. Provide VB upper computer program and source code to realize computer remote control more easily. After receiving each instruction, the module will return to the latest status of all relays. In addition, the module can also respond to the relay status query from the upper computer program. The upper computer program can judge whether each operation is successful or not through these feedbacks from the module, and improve the accuracy of control. SR-104A can be extended with a MO-94C 2 relay module to control 4 relays through serial port.

Specifications:

Power requirements: DC 4.5 V-5 V, positive inside and negative outside; Or DC9-12V.

PCB dimensions: length 71mm x width 47mm.

Features:

1. STC15F104W as the main control chip.

2. Each channel is independently set with a delay of 1 ~ 255 seconds.

3. The operation is simple, and most serial commands are single-byte commands.

4. Onboard 2-way relay

5. Relay with absorption diode circuit

6. Each channel has an LED indicator light, and the relay is engaged when the light is on.

7. An MO-94C module can be extended to control four relays through serial port.

8. With 1 power indicator lamp

9. The work stability of that filter circuit with capacitance is improve.

Support 5V or 9-12V input voltage.

10. 1.6mm thick PCB is made of military grade FR-4 plate, and mounting holes are reserved.

Package Include:

1x Relay Board

Interface Description:

VCC: expansion module power supply positive pole

GND: expansion module power supply negative pole

P34: CH3 control line, active high.

P35: CH4 control line, active high.

Blue terminal: connected to user load, 220V AC equipment or less than 30V DC equipment can be used, and the current of this equipment cannot exceed the standard load of relay. Each relay has a normally open contact, a normally closed contact and a common contact. When the relay is engaged, the common contact and the normally open contact are conducted. When the relay is released, the common contact and the normally closed contact are conducted.