Industrial Modbus RTU 8-ch Relay Module (D) With Digital Input and RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power Supply
Modbus RTU Protocol, Multi Isolation Protection Circuits, Safe & Stable & Reliable
Features At A Glance
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
| 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
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
What's in the box?
1 x Modbus RTU Relay (D)
1 x Screwdriver
Resources
WIKI: www.waveshare.com/wiki/Modbus_RTU_Relay_(D)
- Availability: 12 In Stock
- Model: Modbus RTU 8-ch Relay Module (D)
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