Rhombus Access Control System
8-channel relay module dual Ethernet ports PoE power supply supports Ethernet port cascade communication with isolation
8-channel relay module dual Ethernet ports PoE power supply supports Ethernet port cascade communication with isolation
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This product is an 8-channel relay module specifically designed for industrial environments, featuring dual Ethernet interface control, 8-channel switch input, Modbus RTU/Modbus TCP protocol support, Ethernet port cascade communication, PoE Ethernet port power supply, and ABS shell design. It is easy to operate and boasts fast, stable, reliable, and secure communication, making it suitable for various industrial control devices or applications with high communication requirements.
- Dual Ethernet port design, supporting communication and PoE power supply cascading
- It features a flashing-on and flashing-off function, allowing the relay to automatically shut down after being controlled to open for a certain period of time through instructions
- Supports DC 7V~36V wide voltage power supply and PoE (Power over Ethernet)
- Supports controlling relays via the MQTT protocol, and provides AliCloud MQTT application examples
- On-board optocoupler isolation to avoid interference from high-voltage circuits of relays
- Utilizing a dedicated relay drive chip with built-in freewheeling diode protection, providing stronger and more stable drive capability
- The switch input features bidirectional optocoupler isolation, supports both passive and active switch inputs, incorporates a built-in debouncing algorithm, and the relay supports switch input linkage mode or toggle mode control
- On-board anti-reverse connection circuit to prevent circuit damage caused by reversing the positive and negative poles
- Utilizing high-quality relays, allowing for the connection of loads up to: ≤10A 250V AC or ≤10A 30V DC
- Guide-rail ABS protective shell, convenient for installation and use, and safer with the shell
- Equipped with 4 external LED indicators and a network port indicator, it allows for easy viewing of the MCU status and signal transmission/reception status
Product Specifications
Model:Modbus POE ETH Relay(C)
|
Parameter |
Description |
|
Power Supply Method |
PoE (Power over Ethernet) port, DC 5.5*2.1 power interface, or terminal block (7~36V) |
|
Communication Interface |
PoE port, supports IEEE 802.3af standard |
|
Number of Relays |
8 channels |
|
Contact Type |
1 normally open, 1 normally closed |
|
Contact Load |
≤10A 250V AC or ≤10A 30V DC |
|
Digital Inputs |
8DI, 5~36V, passive input/active input (NPN type or PNP type), with built-in bidirectional optocoupler |
|
Modbus Protocol |
Modbus RTU Protocol or Modbus TCP Protocol |
Indicator Light Description
|
Indicator Light |
Status Description |
|
RUN Light |
Ethernet port operation indicator: After the Ethernet port operates normally, it outputs a square wave with a 2-second period. |
|
STA Light |
MCU (Microcontroller Unit) indicator: It flashes when the MCU operates normally. |
|
TXD Light |
Transmit indicator: Lights up when data is transmitted. |
|
RXD Light |
Receive indicator: Lights up when data is received. |
|
Left Ethernet Port Green Light |
Ethernet Port 1: Lights up after connecting to the Ethernet. |
|
Right Ethernet Port Green Light |
Ethernet Port 2: Lights up after connecting to the Ethernet. |
|
Left Ethernet Port Yellow Light |
Lights up after a TCP (Transmission Control Protocol) connection is established; it can be used to check whether the module has established a communication link with the host computer software. |
|
Right Ethernet Port Yellow Light |
Data activity indicator: When there is data transmission through the Ethernet port, the status of the yellow light changes, which can be used to determine whether there is data transmission. |













