This is due to the minimal wiring required due to the wiring configuration requirements of RS485. RS485 is also commonly used for building automation as the simple wiring configuration and lengthy cable length are ideal for joining remote devices. RS485 is made for serial communication with high speeds, support for long distances, and support for multiple devices (slaves). RS485 main advantages as compared to other serial communication are tolerance to electrical noise, lengthy cable runs, multiple slaves in one connection, and fast data transmission speed. All of this allows you to speed up the VFD that controls the speed of that water pump. This whole system allows manufacturing facilities to control their devices remotely and also set-up automation. Devices utilizing RS485 can communicate with central control systems using communication protocols such as Modbus and ASCII. RS485 provides a means of interconnecting multiple devices in a series using a twisted pair of wires to facilitate data exchange.

The design of RS485 is targeted towards it being tolerant and forgiving to noise and long cable runs with the twisted pair cable arrangement. Being a connector that is frequently used outdoors in severe environments, it is designed to be IP68-rated waterproof and dustproof. It is known for being able to be used effectively over long distances and in electrically noisy environments. The most common cable type is Cat 5e-UTP (unshielded twisted pair) which may work over shorter distances in less demanding applications with low EMI noise levels. SC, G or reference, the common signal reference ground used by the receiver to measure the A and B voltages. Ultimately, it can be thought of in a way that serial communication is more made for this usage as compared to the common USB and ethernet. Serial communication also has a deterministic behaviour to avoid collisions of data packets, making it more reliable for a linkage system with many devices.

As mentioned, RS485 is used to link devices instead of other means as it provides significant advantages. These advantages compared to other alternatives made RS485 popular and used in a widespread amount of instances. However, what if you want to use RS485 in your projects but your device only has USB support? Powerful APP Support: SenseCAP Mate APP allows you to set the sensor templates and quickly turn the data logger into the sensor you want. Templates can be exported and imported to support various applications. Their main difference boils down to one having only support for RS485, while the other one supports RS232 and TTL as well. There are many standards in serial communication and RS485, also known as TIA-485 (-A) or EIA-485, is just one of them. The capacitance is close to 12.5 pF/foot but there is a small impedance mismatch (100 ohms for Cat 5, 120 ohms for RS-485). 100 ohms, Cat 5 cables almost meets the electrical requirements for RS-485 cables. Our range of IIoT products is wide, with different sensors and hubs for different scenarios and requirements.

Designed to be used with the SenseCAP Sensor Hub, this splitter is able to "split" one MODBUS RS485 port into 4. The RS485 splitter has one male interface that connects to the Sensor Hub and four female interfaces that link to the sensors. SenseCAP S2100 data logger can collect data from multiple sensors and transfer the data through the LoRaWAN network. Compatible with Worldwide LoRaWAN networks: It can be used with different types of LoRaWAN gateways and is compatible with multiple LoRaWAN Network Servers (Helium, TTN, etc). In areas with a lot of signal interference, the software may need to perform multiple inquiries to get a valid response. Most Modbus implementations use RS485 due to the allowance of longer distances, higher speeds and multiple devices on a single network. The recommended arrangement of the wires is as a connected series of point-to-point (multidropped) nodes, i.e. a line or bus, not a star, ring, or multiply connected network. The diagram below shows potentials of the A (blue) and B (red) pins of an RS-485 line during transmission of one byte (0xD3, least significant bit first) of data using an asynchronous start-stop method.

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