Modbus RTU Protocol, Latching Relay, Multi Isolation Protection Circuits
Features:
This is an industrial 8-ch latching relay module controlled via RS485 bus, which can keep the relay state unchanged after power loss. It adopts Modbus RTU protocol, featuring embedded protection circuits such as power isolation, magnetical isolation, and TVS diode, etc. It also comes with an ABS enclosure. The Modbus RTU Relay (C) is very easy to use. Due to its fast communication, stability, reliability, and safety, it is an ideal choice for industrial control equipment and/or applications with high communication requirements.
- Adopts latching relay, the state of the relay can remain unchanged after power loss
- Configurable device address (1~255), multi-devices can be cascaded on RS485 bus
- Features flash-on, and flash-off functions, by passing arguments 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, and 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, lightning proof & anti-electrostatic
- Adopts dedicated latching relay driver chip for stronger and more stable driving ability
- Reverse-proof circuit, prevents 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
- 3 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 |
| Relay type |
Latching relay |
| Contact form |
1NO 1NC |
| contact rating |
≤10A 250VAC/30VDC |
| Communication protocol |
Standard Modbus RTU protocol |
| RS485 address |
1~255 |
| LED indicators |
STA: MCU indicator, keeps flashing when the MCU is normally working
TXD: TX indicator, lights up when sending data
RXD: RX indicator, lights up when receiving data |
Primary function
Supports sending Modbus RTU protocol commands via RS485 for relay output control
Hardware Analysis
Multiple protections for safer and more reliable use
Enclosure Design
Rail-mounted ABS plastic enclosure, easy to install, safe to use
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
Applications
Product show
Outline dimensions
