Waveshare Modbus RTU 8-Channel RS485 Relay Module With Digital Input Multi Isolation Protection Circuits, 7~36V Power Supply
Waveshare Modbus RTU 8-Channel RS485 Relay Module With Digital Input Multi Isolation Protection Circuits, 7~36V Power Supply
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1. This product is an industrial-grade 8-channel relay module controlled by RS485 interface, featuring 8-channel switch input, adopting Modbus RTU protocol, and equipped with built-in power isolation, magnetic coupling isolation, and TVS protection circuits. It is designed with an ABS housing. This product is easy to operate and features fast communication speed, stability, reliability, and safety. It is suitable for various industrial control devices or applications with high communication requirements.
2. It supports setting the device address (1 to 255) to cascade multiple devices through the RS485 bus.
3. It has flashing on and off functions, allowing parameters to be set in the instructions to operate the relay to turn on for a certain period and then automatically turn off.
4. It has an integrated power isolation circuit on the board, providing stable isolated voltage, and the isolation end does not require additional power supply.
5. It has an integrated magnetic coupling isolation circuit on the board, capable of signal isolation, with high reliability, strong anti-interference, and low power consumption.
6. It has a self-resetting fuse and TVS (transient voltage suppressor) on the board, effectively suppressing surge voltage and transient peak voltage in the circuit, preventing overcurrent and overvoltage, and protecting against lightning and static electricity.
7. It has an integrated optocoupler isolation circuit on the board to prevent interference from the relays high-voltage circuit.
8. It uses a dedicated relay driver chip with built-in freewheeling diode protection, providing stronger and more stable driving capability.
9. The switch input has bidirectional optocoupler isolation, supporting both passive and active switch input, with an internal anti-bounce algorithm. The relay supports switch input linkage mode or flip mode control.
10. It has an anti-reverse connection circuit on the board to prevent damage to the circuit from reversed positive and negative connections.
11. It uses high-quality relays, allowing a load of up to 10A 250V AC or 10A 30V DC.
12. It has a rail-mounted ABS protective housing, making installation and use convenient, and is safer with the housing.
13. It has an external LED indicator light for easily checking the MCU status and signal transmission and reception status.
Parameters:
1. Power Supply Voltage: 7 - 36V
2. Communication Interface: RS485
3. Communication Baud Rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
4. Default Communication Format: 9600, N, 8, 1
5. Relay Channels: 8 channels
6. Contact Type: One normally open, one normally closed
7. Contact Load: Less than or equal to 10A 250V AC or less than or equal to 10A 30V DC
8. Digital Input: 8DI, 5 - 36V, passive input/active input (NPN type or PNP type), built-in bidirectional optocoupler
9. Modbus Protocol: Standard Modbus RTU protocol
10. RS485 Address Setting: 1 - 255
11. Indicator Lights:
--STA: MCU indicator light, flashes when MCU is working normally
--TXD: Transmission indicator light, lights up when data is being sent
--RXD: Reception indicator light, lights up when data is being received
✓ FREE SHIPPING - No shipping fees charged
✓ International Delivery - Ships from our overseas warehouse
✓ Processing Time - 1-3 days handling time
✓ Estimated Delivery - 6-13 business days total
How It Works:
- Orders placed before 2:00 PM SAST (Monday-Friday) begin processing the same day
- Orders after 2:00 PM or on weekends/holidays process the next business day
- Delivered via private courier with SMS, email, and WhatsApp tracking updates
- If courier cannot reach you, order may be sent to nearest PAXI collection point
- Shipping insurance included in your product price
Customs & Duties Information:
Orders up to R2000:
✓ Delivered Duty Paid (DDP) - The price you see is the final price you pay
✓ We handle all import duties, taxes, and customs clearance fees
✓ No surprise charges upon delivery
Orders over R2000:
⚠️ You will be responsible for any import duties, taxes, and customs clearance fees upon delivery
Note: Your ID information may be required for customs clearance to ensure smooth delivery.
At PMC TechLife, we are committed to ensuring our customers are satisfied with their purchases. Our return policy is designed to be transparent, fair, and fully compliant with South African consumer protection laws, including the Consumer Protection Act (CPA) and the Electronic Communications and Transactions Act (ECTA).
We offer distinct return processes based on the reason for your return. Please read the following sections carefully to understand your rights and the procedures for returning an item.
1. Your Right to Return Defective or Faulty Goods (6-Month Warranty)
In accordance with the Consumer Protection Act, if any product you receive is defective, faulty, unsafe, or of poor quality, you have 6 months from the date of delivery to return it. In such cases, you are entitled to a full refund, a replacement, or a repair of the item, at your choice. We will cover all costs associated with the return shipping for defective items.
To be eligible for a defective goods return:
- The return must be logged within 6 months of delivery.
- The item should be returned with all parts and original packaging where possible. We understand that discovering a defect may require opening the packaging or breaking a seal; returns for defective items will be accepted even if opened.
- Our inspection must confirm the issue was a manufacturing defect and not caused by customer misuse, improper installation, or normal wear and tear.
2. Your Right to a 'Cooling-Off' Return (Change of Mind)
In line with the Electronic Communications and Transactions Act for online purchases, you have a 7-day 'cooling-off' period. If you change your mind or ordered incorrectly, you have 7 days from the date of delivery to request a return for a refund or exchange.
To be eligible for a 'change of mind' return:
- The item must be in its original, as-new, and resalable condition, unworn and unused.
- The item must be returned in its original packaging, with all original tags and accessories included. You may open the packaging to inspect the item, but it must be returned undamaged.
- The customer is responsible for the cost of return shipping.
- Important: There are no handling or restocking fees for change-of-mind returns. You will be refunded the full purchase price, as the law grants you the right to cancel "without penalty."
3. How to Start a Return
To initiate any return, please follow these steps:
- Visit our dedicated returns portal: pmctechlife.returnscenter.com.
- Enter your order number and the email address used for the purchase.
- Follow the prompts to select the item(s) you wish to return and the reason for the return.
Once your request is submitted, we will review it. If your return is accepted, we will send you instructions on how and where to send your package. Items sent back to us without first requesting and receiving authorisation will not be accepted.
4. Exceptions & Non-Returnable Items
Please note that for 'change of mind' reasons, we cannot accept returns on the following:
- Gift cards
- Custom-ordered or personalized items
- Items specified as non-returnable for hygiene reasons (e.g., roll-on products, clothing, and personal care goods).
This does not affect your statutory right to return any item (including sale items) that is defective or faulty within 6 months of delivery.
5. Specific Product Notes
- LCD Screens: To prevent damage during installation, we strongly recommend that our LCD screens are installed by a qualified professional technician. Damage caused by improper installation is not covered under the 6-month warranty for manufacturing defects. If you believe an LCD screen was faulty upon arrival, providing an invoice from a technician can help expedite the assessment of your return claim.
- Spare Parts: Spare parts products cannot be returned if they have been installed on a mobile phone and are found to be working after installation. This does not affect your rights if the part was defective upon arrival.
6. Exchanges
The fastest way to ensure you get what you want is to return the item you have following the process above. Once the return is accepted and processed, you can make a separate purchase for the new item.
7. Refunds
We will notify you once we’ve received and inspected your return and let you know if the refund was approved based on the policy conditions. If approved, we will issue the refund to your original payment method within 5-7 business days. Please note that it may take additional time for your bank or credit card company to process and post the refund to your account.
8. Cancellation Policy
You can request to cancel your order by emailing us at sales@pmcjewellery.co.za.
- Before Shipping: We can only guarantee cancellation if your order has not yet been shipped.
- After Shipping: Once an order has shipped, it cannot be cancelled. If you wish to return the order, you must wait to receive it and then initiate a return through our portal. Such returns will be treated as 'Change of Mind' returns.
You can always contact us for any return questions at our help center.
Description
Description
1. This product is an industrial-grade 8-channel relay module controlled by RS485 interface, featuring 8-channel switch input, adopting Modbus RTU protocol, and equipped with built-in power isolation, magnetic coupling isolation, and TVS protection circuits. It is designed with an ABS housing. This product is easy to operate and features fast communication speed, stability, reliability, and safety. It is suitable for various industrial control devices or applications with high communication requirements.
2. It supports setting the device address (1 to 255) to cascade multiple devices through the RS485 bus.
3. It has flashing on and off functions, allowing parameters to be set in the instructions to operate the relay to turn on for a certain period and then automatically turn off.
4. It has an integrated power isolation circuit on the board, providing stable isolated voltage, and the isolation end does not require additional power supply.
5. It has an integrated magnetic coupling isolation circuit on the board, capable of signal isolation, with high reliability, strong anti-interference, and low power consumption.
6. It has a self-resetting fuse and TVS (transient voltage suppressor) on the board, effectively suppressing surge voltage and transient peak voltage in the circuit, preventing overcurrent and overvoltage, and protecting against lightning and static electricity.
7. It has an integrated optocoupler isolation circuit on the board to prevent interference from the relays high-voltage circuit.
8. It uses a dedicated relay driver chip with built-in freewheeling diode protection, providing stronger and more stable driving capability.
9. The switch input has bidirectional optocoupler isolation, supporting both passive and active switch input, with an internal anti-bounce algorithm. The relay supports switch input linkage mode or flip mode control.
10. It has an anti-reverse connection circuit on the board to prevent damage to the circuit from reversed positive and negative connections.
11. It uses high-quality relays, allowing a load of up to 10A 250V AC or 10A 30V DC.
12. It has a rail-mounted ABS protective housing, making installation and use convenient, and is safer with the housing.
13. It has an external LED indicator light for easily checking the MCU status and signal transmission and reception status.
Parameters:
1. Power Supply Voltage: 7 - 36V
2. Communication Interface: RS485
3. Communication Baud Rate: 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000
4. Default Communication Format: 9600, N, 8, 1
5. Relay Channels: 8 channels
6. Contact Type: One normally open, one normally closed
7. Contact Load: Less than or equal to 10A 250V AC or less than or equal to 10A 30V DC
8. Digital Input: 8DI, 5 - 36V, passive input/active input (NPN type or PNP type), built-in bidirectional optocoupler
9. Modbus Protocol: Standard Modbus RTU protocol
10. RS485 Address Setting: 1 - 255
11. Indicator Lights:
--STA: MCU indicator light, flashes when MCU is working normally
--TXD: Transmission indicator light, lights up when data is being sent
--RXD: Reception indicator light, lights up when data is being received
Delivery Process
Delivery Process
✓ FREE SHIPPING - No shipping fees charged
✓ International Delivery - Ships from our overseas warehouse
✓ Processing Time - 1-3 days handling time
✓ Estimated Delivery - 6-13 business days total
How It Works:
- Orders placed before 2:00 PM SAST (Monday-Friday) begin processing the same day
- Orders after 2:00 PM or on weekends/holidays process the next business day
- Delivered via private courier with SMS, email, and WhatsApp tracking updates
- If courier cannot reach you, order may be sent to nearest PAXI collection point
- Shipping insurance included in your product price
Customs & Duties Information:
Orders up to R2000:
✓ Delivered Duty Paid (DDP) - The price you see is the final price you pay
✓ We handle all import duties, taxes, and customs clearance fees
✓ No surprise charges upon delivery
Orders over R2000:
⚠️ You will be responsible for any import duties, taxes, and customs clearance fees upon delivery
Note: Your ID information may be required for customs clearance to ensure smooth delivery.
Refunds & Returns
Refunds & Returns
At PMC TechLife, we are committed to ensuring our customers are satisfied with their purchases. Our return policy is designed to be transparent, fair, and fully compliant with South African consumer protection laws, including the Consumer Protection Act (CPA) and the Electronic Communications and Transactions Act (ECTA).
We offer distinct return processes based on the reason for your return. Please read the following sections carefully to understand your rights and the procedures for returning an item.
1. Your Right to Return Defective or Faulty Goods (6-Month Warranty)
In accordance with the Consumer Protection Act, if any product you receive is defective, faulty, unsafe, or of poor quality, you have 6 months from the date of delivery to return it. In such cases, you are entitled to a full refund, a replacement, or a repair of the item, at your choice. We will cover all costs associated with the return shipping for defective items.
To be eligible for a defective goods return:
- The return must be logged within 6 months of delivery.
- The item should be returned with all parts and original packaging where possible. We understand that discovering a defect may require opening the packaging or breaking a seal; returns for defective items will be accepted even if opened.
- Our inspection must confirm the issue was a manufacturing defect and not caused by customer misuse, improper installation, or normal wear and tear.
2. Your Right to a 'Cooling-Off' Return (Change of Mind)
In line with the Electronic Communications and Transactions Act for online purchases, you have a 7-day 'cooling-off' period. If you change your mind or ordered incorrectly, you have 7 days from the date of delivery to request a return for a refund or exchange.
To be eligible for a 'change of mind' return:
- The item must be in its original, as-new, and resalable condition, unworn and unused.
- The item must be returned in its original packaging, with all original tags and accessories included. You may open the packaging to inspect the item, but it must be returned undamaged.
- The customer is responsible for the cost of return shipping.
- Important: There are no handling or restocking fees for change-of-mind returns. You will be refunded the full purchase price, as the law grants you the right to cancel "without penalty."
3. How to Start a Return
To initiate any return, please follow these steps:
- Visit our dedicated returns portal: pmctechlife.returnscenter.com.
- Enter your order number and the email address used for the purchase.
- Follow the prompts to select the item(s) you wish to return and the reason for the return.
Once your request is submitted, we will review it. If your return is accepted, we will send you instructions on how and where to send your package. Items sent back to us without first requesting and receiving authorisation will not be accepted.
4. Exceptions & Non-Returnable Items
Please note that for 'change of mind' reasons, we cannot accept returns on the following:
- Gift cards
- Custom-ordered or personalized items
- Items specified as non-returnable for hygiene reasons (e.g., roll-on products, clothing, and personal care goods).
This does not affect your statutory right to return any item (including sale items) that is defective or faulty within 6 months of delivery.
5. Specific Product Notes
- LCD Screens: To prevent damage during installation, we strongly recommend that our LCD screens are installed by a qualified professional technician. Damage caused by improper installation is not covered under the 6-month warranty for manufacturing defects. If you believe an LCD screen was faulty upon arrival, providing an invoice from a technician can help expedite the assessment of your return claim.
- Spare Parts: Spare parts products cannot be returned if they have been installed on a mobile phone and are found to be working after installation. This does not affect your rights if the part was defective upon arrival.
6. Exchanges
The fastest way to ensure you get what you want is to return the item you have following the process above. Once the return is accepted and processed, you can make a separate purchase for the new item.
7. Refunds
We will notify you once we’ve received and inspected your return and let you know if the refund was approved based on the policy conditions. If approved, we will issue the refund to your original payment method within 5-7 business days. Please note that it may take additional time for your bank or credit card company to process and post the refund to your account.
8. Cancellation Policy
You can request to cancel your order by emailing us at sales@pmcjewellery.co.za.
- Before Shipping: We can only guarantee cancellation if your order has not yet been shipped.
- After Shipping: Once an order has shipped, it cannot be cancelled. If you wish to return the order, you must wait to receive it and then initiate a return through our portal. Such returns will be treated as 'Change of Mind' returns.
You can always contact us for any return questions at our help center.
