How to Choose a Modular PLC for Panel Automation

Selecting the right PLC starts with four questions:

1. How many IO points do you need today, and in 2 years? The Selec MiBRX 6M offers 6 flexible IO card slots plus Modbus RTU expansion.

2. What supply voltage does your panel run on? The MiBRX 6M is available in 230VAC and isolated 24VDC variants.

3. Which protocols does your plant use? Look for RS485 Modbus RTU master/slave as a baseline, with Ethernet Modbus TCP for SCADA integration.

4. Do you need an operator display? Pluggable LED/LCD display options avoid the cost of a separate HMI for simple machines.