RS485 Energy Monitoring Breaker-WRSM1-2P 🔍
×

RS485 Energy Monitoring Breaker-WRSM1-2P

WDYK RS485 Energy Monitoring Breaker，it has overload protection feacture, overvoltage and undervoltage protectionfeacture, short circuit protection feacture, and can also remotely control the circuit breaker through PLC.Moreover It has built-in transformers and metering chips, which can real-time calculate and display your accurate electricity data.

Ask Quote Now 📧
Category: Smart Circuit Breaker

What is the maximum number of RS485 metering circuit breakers that can be connected to a single bus? How to avoid address conflicts?

Consideration Dimension
Specific Situation Description
Key Points / Recommended Solutions
Theoretical Node Capacity​
RS485 chips typically have theoretical load capacities of 32, 128, or 256 units, among other levels.
This is the physical upper limit determined by the electrical characteristics of the RS485 interface chip. Always consult the chip datasheet during selection.
Practical Recommended Quantity​
In practice, connecting up to 32 devices on a single bus is a common and stable configuration.
The more devices connected, the greater the network impedance and number of potential failure points, making troubleshooting significantly more difficult. It is not advisable to push for the theoretical maximum.
Extension Method​
The network can be expanded in terms of node count and communication distance by using an RS485 repeater.
The repeater itself occupies one node address and introduces a slight delay. It helps isolate faulty network segments, thereby enhancing overall network stability.
Root Cause of Address Conflict​
Multiple devices on the bus are configured with the same Modbus slave address.
An address conflict causes multiple devices to respond simultaneously to master queries, leading to data frame collisions, communication failures, or data corruption.

Get A Free Quote And Technical Help