DESCRIPTION
Industrial Modbus RTU 8-Ch Relay Module (D) With Digital Input And RS485 Interface, Multi Isolation Protection Circuits, 7~36V Power SupplyRS485 8-Ch Relay Module (D)
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
SpecificationsPOWER SUPPLY7~36VCOMMUNICATION INTERFACERS485BAUDRATE4800, 9600, 19200, 38400, 57600, 115200, 128000, 256000DEFAULT COMMUNICATION FORMAT9600, N, 8, 1RELAY CHANNELS8CONTACT FORM1NO 1NCCONTACT RATING≤10A 250VAC/30VDCDIGITAL INPUT8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolationCOMMUNICATION PROTOCOLStandard Modbus RTU protocolRS485 ADDRESS1~255LED INDICATORSSTA: 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, theUSB TO RS232/485/TTLconverter 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
Applications
Product Show
Outline DimensionsResources & ServicesWIKI:[link removed by ]
* Resources for different product may vary, please check the wiki page to confirm the actually provided resources.
Selection GuidePRODUCTMODBUS POE ETH RELAYMODBUS RTU RELAYMODBUS RTU RELAY (B)MODBUS RTU RELAY (D)MODBUS RTU RELAY 16CHMODBUS RTU RELAY 32CHCOMMUNICATION PARAMETERSCommunication interfaceEthernet port (PoE support)RS485 portBaud (configurable)Default communication format-9600, N, 8, 1Communications protocolTCP/UDP/MQTTRS485 protocolModbus protocolModbus RTU Protocol or Modbus TCP ProtocolModbus RTU ProtocolDevice addressUnconfigurable, identify the devices by IP address1~255 (configurable, supports cascading multiple devices)CONTROL INTERFACEOutput control (DO)8-ch relay16-ch relay32-ch relayContact form1NO 1NCContact rating≤10A 250VAC/30VDCDIGITAL INPUT-8DI, 5~36V, passive / active input (NPN or PNP), built-in bi-directional optocoupler isolation-OTHERSPower SupplyPoE port, DC 5.5*2.1 power port, or screw terminalDC 5.5*2.1 power port, or screw terminalPower range7~36V wide range5V7~36V wide range5V7~36V wide DIN 35mm rail mounting, wall mountingPACKAGE CONTENT
Weight:0.296 kg
- The power supply of this product is not included, it is recommended to purchase12V power supplyif you need it.
- It is also recommended to purchaseUSB TO RS232/485/TTLorUSB TO RS485at the same time for easy testing.
- Modbus RTU Relay (D) x1
- Screwdriver x1
