Selec MiBRX 4M Modular PLC
Selec MiBRX-4M Modular PLC Base Module – 230V / 24VDC, 4-Slot DIN-Rail PLC
High-performance 4-slot modular PLC with pluggable/independent display, RS485 Modbus RTU Master/Slave, fast inputs, RTC, and flexible I/O expansion for OEM and process automation applications.
The Selec MiBRX-4M is a compact modular PLC designed for OEM automation and process control applications requiring reliable communication, flexible I/O expansion, built-in RTC, fast inputs, and support for analog measurement. With four expansion slots, RS485 Modbus Master/Slave, and pluggable display options, it is ideal for medium-complexity automation panels.
Key Features
4 I/O slots for digital, analog, relay, transistor, AO, load cell & special function cards
Pluggable or independent display modules (LCD or Blind LED version)
RS485 Modbus RTU Master + Slave communication ports
5 DI, including 1 Fast Input (5 kHz) + 1 analog-voltage input (AI-V)
NTC input support and additional AI inputs via I/O cards
High-speed logic execution: 200 µs minimum scan time
RTC with Time Switch function, ±4 sec/day drift
Relay or transistor output expansion options
Supports independent 96×96 display modules for larger HMIs
Windows-based SelPro software for ladder + HMI configuration
Technical Specifications
| Parameter | Specification |
|---|---|
| Mounting | DIN Rail (70 mm width) |
| Display Options | LCD 8×2 or Blind LED display modules |
| I/O Slots | 4 |
| Digital Inputs | 5 DI incl. 1 Fast Input + 1 AI-V input |
| Fast Input Speed | 5 kHz (Encoder supported: uni/bidirectional/quadrature) |
| Analog Inputs | 1 NTC + optional card-based AI (TC/RTD/V/A/PT1000) |
| Relay Outputs | As per card configuration (2/3/4/5 NO relays) |
| Transistor Outputs | 4 PNP sourcing outputs (with TO04 card) |
| Analog Outputs | 0–10V / 0–20mA via AO cards |
| Communication | RS485 Slave + RS485 Master for expansion |
| Program Memory | 240 KB |
| Data Memory | 32 KB |
| EEPROM | 8 KB |
| Scan Time | 200 µs (min), 1 ms typical |
| RTC | Yes, ±4 sec/day drift |
| Supply Voltage | 230V AC (with retention) / 24V DC |
| Power Consumption | 6 VA (AC) / 6W (DC) |
| Operating Temp | 0–55°C |
| IP Protection | IP50 (display), IP20 (terminals) |
| Dimensions | 70 × 94 × 67 mm |
| Weight | 150 g |
Applications
OEM customised machines
Packing & dosing systems
Conveyor & motion control (encoder input)
HVAC control and monitoring
Industrial panel automation
PLC-based control loops with RTC scheduling
What’s in the Box?
MiBRX-4M PLC Base Unit
Terminal connectors
User manual (digital)
Warranty card
FAQ
Q1. How many I/O cards can be connected?
Up to 4 slot cards (DI, DO, AI, AO, load cell, fast I/O, Wi-Fi, etc.).
Q2. Does it support encoder inputs?
Yes, the Fast Input supports 5 kHz with quadrature/uni/bidirectional modes.
Q3. Does the PLC have an RTC?
Yes, RTC with ±4 seconds/day drift.
Q4. Can this PLC be used with a 96×96 HMI display?
Yes, via the MiBRX Independent Display (Text/Graphic/Segment) modules.
Q5. Does it support analog sensors?
The base unit supports NTC; additional analog types via I/O cards (RTD, TC, V, mA).
Q6. Is Modbus supported?
Yes, RS485 Modbus RTU with master and slave ports.