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RS485 8-ch Relay Module (D)
Modbus RTU Protocol, Multi Isolation Protection Circuits, Safe & Stable & Reliable
Features
This is an industrial 8-ch relay module controlled via RS485 bus, with 8-ch digital input, utilizing Modbus RTU protocol. It features embedded protection circuits such as power isolation, magnetical isolation, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (D) is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipments and/or applications with high communication requirement.
- Configurable device address (1~255), multi devices can be cascaded on RS485 bus
- Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically
- Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
- Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
- Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
- Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
- Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability
- Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. The relay supports digital input linkage control or toggle control
- Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
- High quality relay, contact rating: ≤10A 250VAC/30VDC
- Rail-mounted ABS plastic enclosure, easy to install, safe to use
- Multiple LEDs for indicating the MCU status and signal transceiving status
Specifications
| Power supply | 7~36V |
|---|---|
| Communication interface | RS485 |
| Baudrate | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
| Default communication format | 9600, N, 8, 1 |
| Relay channels | 8 |
| Contact form | 1NO 1NC |
| contact rating | ≤10A 250VAC/30VDC |
| Digital input | 8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation |
| Communication protocol | Standard Modbus RTU protocol |
| RS485 address | 1~255 |
| LED indicators | STA: MCU indicator, keeps flashing when the MCU normally working TXD: TX indicator, lights up when sending data RXD: RX indicator, lights up when receiving data |
Primary function
Supports reading digital input by sending Modbus RTU protocol commands via RS485 for relay output control
Hardware Analysis
Multiple protections for safer and more reliable use
Digital Input
Supports passive (dry contact) and active (wet contact) digital input, with bi-directional optocoupler isolation
Interfaces & Indicators
With Multiple LED Indicators, Easy To Monitor The Operating Status
Multiple modes for various automation scenarios
Supports multiple relay control modes, each channel
supports independent control mode setting
RS485 Communication
Configurable device address (1~255), multi devices can be cascaded on RS485 bus
In case of many devices are cascaded, or communication distance is quite long,
it is necessary to use RS485 repeaters
for reference only, the USB TO RS232/485/TTL converter is Not included
Relay connection
Contact rating of the onboard relay up to 10A 250VAC/30VDC
Directly controlling 220VAC home appliances, or devices below 30VDC
Enclosure Design
Rail-mounted ABS plastic enclosure, easy to install, safe to use
Outline dimensions
Resources
WIKI: www.waveshare.com/wiki/Modbus_RTU_Relay_(D)
Package Contains:
Weight: 0.296 kg
- The power supply of this product is not included, it is recommended to purchase 12V power supply if you need it.
- It is also recommended to purchase USB TO RS232/485/TTL or USB TO RS485 at the same time for easy testing.
- Modbus RTU Relay (D) x1
- Screwdriver x1
What is the main function of this module and how many channels does it have?
It is an RS485 Modbus RTU based 8 channel relay module with 8 digital inputs for industrial control.
What power supply is required and is one included?
The device needs a 7 to 36 V power supply, which is not included in the package. An optional 12 V power supply is commonly used if needed.
How do I configure the Modbus address and baud rate?
The Modbus address is configurable from 1 to 255 and the baud rate supports 4800, 9600, 19200, 38400, 57600, 115200, 128000 and 256000 with 9600 8N1 as the default.
What protection and isolation features are built in?
The board includes power and magnetical isolation, a TVS diode, a resettable fuse, and optocoupler isolation to improve safety and reduce interference.
What are the relay and digital input specifications for load and control?
The relay contacts are rated up to 10 A at 250 VAC or 30 VDC, suitable for 220 VAC loads or devices under 30 VDC. The 8 digital inputs support passive and active signals with bidirectional optocoupler isolation and built in debouncing.
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Description
Ask AI about this product
RS485 8-ch Relay Module (D)
Modbus RTU Protocol, Multi Isolation Protection Circuits, Safe & Stable & Reliable
Features
This is an industrial 8-ch relay module controlled via RS485 bus, with 8-ch digital input, utilizing Modbus RTU protocol. It features embedded protection circuits such as power isolation, magnetical isolation, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (D) is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipments and/or applications with high communication requirement.
- Configurable device address (1~255), multi devices can be cascaded on RS485 bus
- Features flash-on, flash-off function, by passing argument to the command, it is possible to turn on the relay for a while and then close it automatically
- Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
- Onboard unibody magnetical isolation, allows signal isolation, high reliability, strong anti-interference, low power consumption
- Onboard resettable fuse and TVS (Transient Voltage Suppressor), effectively suppress surge voltage and transient spike voltage in the circuit, provides over-current/over-voltage proof, lightningproof & anti-electrostatic
- Onboard Optocoupler isolation, prevent the relay from being interfered by high-voltage circuit
- Adopts dedicated relay driver chip, with built-in flyback diode protection, for stronger and more stable driving ability
- Supports passive and active digital input, with bi-directional optocoupler isolation, built in debouncing algorithm. The relay supports digital input linkage control or toggle control
- Reverse-proof circuit, prevent the circuit from being damaged accidentally by incorrect connection
- High quality relay, contact rating: ≤10A 250VAC/30VDC
- Rail-mounted ABS plastic enclosure, easy to install, safe to use
- Multiple LEDs for indicating the MCU status and signal transceiving status
Specifications
| Power supply | 7~36V |
|---|---|
| Communication interface | RS485 |
| Baudrate | 4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000 |
| Default communication format | 9600, N, 8, 1 |
| Relay channels | 8 |
| Contact form | 1NO 1NC |
| contact rating | ≤10A 250VAC/30VDC |
| Digital input | 8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation |
| Communication protocol | Standard Modbus RTU protocol |
| RS485 address | 1~255 |
| LED indicators | STA: MCU indicator, keeps flashing when the MCU normally working TXD: TX indicator, lights up when sending data RXD: RX indicator, lights up when receiving data |
Primary function
Supports reading digital input by sending Modbus RTU protocol commands via RS485 for relay output control
Hardware Analysis
Multiple protections for safer and more reliable use
Digital Input
Supports passive (dry contact) and active (wet contact) digital input, with bi-directional optocoupler isolation
Interfaces & Indicators
With Multiple LED Indicators, Easy To Monitor The Operating Status
Multiple modes for various automation scenarios
Supports multiple relay control modes, each channel
supports independent control mode setting
RS485 Communication
Configurable device address (1~255), multi devices can be cascaded on RS485 bus
In case of many devices are cascaded, or communication distance is quite long,
it is necessary to use RS485 repeaters
for reference only, the USB TO RS232/485/TTL converter is Not included
Relay connection
Contact rating of the onboard relay up to 10A 250VAC/30VDC
Directly controlling 220VAC home appliances, or devices below 30VDC
Enclosure Design
Rail-mounted ABS plastic enclosure, easy to install, safe to use
Outline dimensions
Resources
WIKI: www.waveshare.com/wiki/Modbus_RTU_Relay_(D)
Package Contains:
Weight: 0.296 kg
- The power supply of this product is not included, it is recommended to purchase 12V power supply if you need it.
- It is also recommended to purchase USB TO RS232/485/TTL or USB TO RS485 at the same time for easy testing.
- Modbus RTU Relay (D) x1
- Screwdriver x1
FAQ
What is the main function of this module and how many channels does it have?
It is an RS485 Modbus RTU based 8 channel relay module with 8 digital inputs for industrial control.
What power supply is required and is one included?
The device needs a 7 to 36 V power supply, which is not included in the package. An optional 12 V power supply is commonly used if needed.
How do I configure the Modbus address and baud rate?
The Modbus address is configurable from 1 to 255 and the baud rate supports 4800, 9600, 19200, 38400, 57600, 115200, 128000 and 256000 with 9600 8N1 as the default.
What protection and isolation features are built in?
The board includes power and magnetical isolation, a TVS diode, a resettable fuse, and optocoupler isolation to improve safety and reduce interference.
What are the relay and digital input specifications for load and control?
The relay contacts are rated up to 10 A at 250 VAC or 30 VDC, suitable for 220 VAC loads or devices under 30 VDC. The 8 digital inputs support passive and active signals with bidirectional optocoupler isolation and built in debouncing.
Reviews
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