1. Introduction
This document provides instructions for the Voktta 16 Channel Serial Relay Module. This module is a versatile development board designed for controlling up to 16 independent relays via serial communication. It supports a wide DC input voltage range and can be powered via an external supply or USB. Please read this manual carefully before operation to ensure proper and safe use.
Video: Overview of the Voktta 16 Channel Serial Relay Module.
Image: Top-down view of the Voktta 16 Channel Serial Relay Module, showing all 16 blue relays and connection terminals.
Image: Front and back views of the Voktta 16 Channel Serial Relay Module, highlighting component placement and solder points.
2. Specifications
| Attribute | Value |
|---|---|
| Power Source | DC |
| Theory | Solid State Relay |
| is_customized | Yes |
| Contact Load | Low Power |
| Model Number | 16 Channel 16 CH Serial Relay Module |
| Brand Name | Voktta |
| Voltage | 12V (Operating range DC 7V-38V) |
| Origin | Mainland China |
| Certification | CE |
| Use | General Purpose |
| Protect Feature | Sealed |
| Maximum Load | 10A/250V |
3. Setup
Before connecting the module, ensure all power sources are disconnected. Refer to the diagram below for component identification.
Image: Detailed diagram of the relay module with key areas labeled.
3.1 Component Identification
- Zone 1: Relay Module - The main relay components.
- Zone 2: Output Normally Open/Normally Closed Terminal - Connect your load devices here. Each relay has its own set of terminals.
- Zone 3: Power Input - For external DC power supply (7V-38V).
- Zone 4: Power Supply Selection Jumper - Used to select between external power or USB power.
- Zone 5: Serial Port Terminal - For serial communication with a control device.
3.2 Power Supply Configuration
The module can be powered in two ways:
- USB Power Supply: Connect the jumper cap at Zone 4. Ensure the USB power source can provide a minimum current greater than 1.5A.
- External Power Supply: Remove the jumper cap at Zone 4. Connect a DC power supply within the 7V-38V range to the terminals in Zone 3.
Caution: Do not connect both USB and external power simultaneously unless specified by advanced documentation. Ensure correct polarity when connecting external power.
4. Operating Instructions
The relay module is controlled via serial communication. The following table outlines the commands for status query, opening, and closing individual relays, as well as global commands for all relays.
4.1 Serial Communication Protocol
The commands are represented in hexadecimal format. Each command ends with 0D 0A (Carriage Return, Line Feed).
| Function | Command (Hex) |
|---|---|
| Status Query | 3A 46 45 30 31 30 30 30 30 30 30 31 30 46 31 0D 0A |
| State Return Value | 3A 46 45 30 31 30 30 32 30 30 30 30 30 46 46 0D 0A |
| 1st Way Open | 3A 46 45 30 35 30 30 30 30 46 46 30 30 46 45 0D 0A |
| 1st Way Close | 3A 46 45 30 35 30 30 30 30 30 30 30 30 30 46 44 0D 0A |
| 2nd Way Open | 3A 46 45 30 35 30 30 30 31 46 46 30 30 46 44 0D 0A |
| 2nd Way Close | 3A 46 45 30 35 30 30 30 31 30 30 30 30 46 43 0D 0A |
| 3rd Way Open | 3A 46 45 30 35 30 30 30 32 46 46 30 30 46 43 0D 0A |
| 3rd Way Close | 3A 46 45 30 35 30 30 30 32 30 30 30 30 46 42 0D 0A |
| 4th Way Open | 3A 46 45 30 35 30 30 30 33 46 46 30 30 46 42 0D 0A |
| 4th Way Close | 3A 46 45 30 35 30 30 30 33 30 30 30 30 46 41 0D 0A |
| 5th Way Open | 3A 46 45 30 35 30 30 30 34 46 46 30 30 46 41 0D 0A |
| 5th Way Close | 3A 46 45 30 35 30 30 30 34 30 30 30 30 46 39 0D 0A |
| 6th Way Open | 3A 46 45 30 35 30 30 30 35 46 46 30 30 46 39 0D 0A |
| 6th Way Close | 3A 46 45 30 35 30 30 30 35 30 30 30 30 46 38 0D 0A |
| 7th Way Open | 3A 46 45 30 35 30 30 30 36 46 46 30 30 46 38 0D 0A |
| 7th Way Close | 3A 46 45 30 35 30 30 30 36 30 30 30 30 46 37 0D 0A |
| 8th Way Open | 3A 46 45 30 35 30 30 30 37 46 46 30 30 46 37 0D 0A |
| 8th Way Close | 3A 46 45 30 35 30 30 30 37 30 30 30 30 46 36 0D 0A |
| 9th Way Open | 3A 46 45 30 35 30 30 30 38 46 46 30 30 46 36 0D 0A |
| 9th Way Close | 3A 46 45 30 35 30 30 30 38 30 30 30 30 46 35 0D 0A |
| 10th Way Open | 3A 46 45 30 35 30 30 30 39 46 46 30 30 46 35 0D 0A |
| 10th Way Close | 3A 46 45 30 35 30 30 30 39 30 30 30 30 46 34 0D 0A |
| 11th Way Open | 3A 46 45 30 35 30 30 30 41 46 46 30 30 46 34 0D 0A |
| 11th Way Close | 3A 46 45 30 35 30 30 30 41 30 30 30 30 46 33 0D 0A |
| 12th Way Open | 3A 46 45 30 35 30 30 30 42 46 46 30 30 46 33 0D 0A |
| 12th Way Close | 3A 46 45 30 35 30 30 30 42 30 30 30 30 46 32 0D 0A |
| 13th Way Open | 3A 46 45 30 35 30 30 30 43 46 46 30 30 46 32 0D 0A |
| 13th Way Close | 3A 46 45 30 35 30 30 30 43 30 30 30 30 46 31 0D 0A |
| 14th Way Open | 3A 46 45 30 35 30 30 30 44 46 46 30 30 46 31 0D 0A |
| 14th Way Close | 3A 46 45 30 35 30 30 30 44 30 30 30 30 46 30 0D 0A |
| 15th Way Open | 3A 46 45 30 35 30 30 30 45 46 46 30 30 46 30 0D 0A |
| 15th Way Close | 3A 46 45 30 35 30 30 30 45 30 30 30 30 46 46 0D 0A |
| 16th Way Open | 3A 46 45 30 35 30 30 30 46 46 46 30 30 46 46 0D 0A |
| 16th Way Close | 3A 46 45 30 35 30 30 30 46 30 30 30 30 46 45 0D 0A |
| Fully Open (All Relays) | 3A 46 45 30 46 30 30 30 30 30 30 31 30 30 32 46 46 46 45 33 0D 0A |
| Fully Close (All Relays) | 3A 46 45 30 46 30 30 30 30 30 30 30 31 30 30 32 30 30 30 30 45 31 0D 0A |
5. Maintenance
- Keep the module clean and free from dust and moisture.
- Avoid exposing the module to extreme temperatures or direct sunlight.
- Regularly check all connections for tightness and corrosion.
- Do not attempt to repair the module yourself if you are not qualified. Refer to professional service.
6. Troubleshooting
- Module not powering on: Verify the power supply connection (Zone 3 or USB) and ensure the correct jumper cap setting (Zone 4). Check that the power source provides sufficient current (min 1.5A for USB) and is within the DC 7V-38V range.
- Relays not responding to commands: Double-check your serial communication setup, including baud rate, data bits, parity, and stop bits. Ensure the serial port terminal (Zone 5) is correctly wired to your control device. Verify that the commands sent match the protocol in Section 4.1.
- Intermittent relay operation: This could be due to unstable power supply, loose connections, or electromagnetic interference. Ensure a stable power source and secure wiring. Consider shielding if interference is suspected.
7. User Tips
- Control Software: While specific software is not provided, this serial relay board can typically be controlled using any serial terminal program (e.g., PuTTY, Tera Term, Arduino Serial Monitor) or custom applications developed in languages like Python, C#, or Java that can send serial commands. You will need to implement the communication protocol detailed in Section 4.1.
- Power Supply for USB: If using USB for power, ensure the USB port or adapter can deliver at least 1.5A, especially when multiple relays are active, to prevent brownouts or unreliable operation.
- Wiring Loads: When connecting loads to Zone 2, pay attention to whether you need a Normally Open (NO) or Normally Closed (NC) connection based on your application's requirements.
8. Warranty and Support
For warranty information and technical support, please contact your retailer or the manufacturer directly. Keep your proof of purchase for any warranty claims.
