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Cabinet Controllers – IO Extender

Seamless Connectivity for Smarter Urban Infrastructure

  • The IO Extender is a DIN-Rail-mounted industrial automation module, designed to expand I/O capabilities while offering programmable logic control (PLC) functionality. 
     

  • Engineered for seamless integration, the device delivers high-performance automation in an ultra-compact 22.5mm DIN-Rail form factor.

IO Extender Models
IO S.jpg
IO.jpg

SRMS IO T25-S
With touchscreen
control and function display

SRMS IO T25
Without touchscreen 
control and display

Ideal Applications
  • Industrial Automation – Expand PLC capabilities with high-density I/O.
     

  • Lighting Control – Seamless integration with DALI-2 and DMX512 networks.
     

  • Smart Cities & Infrastructure – IoT-enabled connectivity for remote management.
     

  • Process Monitoring & Energy Management – Real-time data collection & edge processing.

Key Features
  • High IO Density in a Compact Form
    More input and output connections in a small-sized device, making it powerful yet space-saving.

  • Advanced Connectivity for Smart Industrial Control
    Easily connects with different systems, sensors, and networks, allowing smooth communication between devices.

  • Software-Defined IO Operation Modes
    Each connection can be customized through software to perform different tasks, making the device highly flexible.

  • Intelligent Control & Edge Processing
    Can process data locally before sending it elsewhere, reducing delays and improving efficiency.

  • Smart Monitoring & Remote Access
    The system can be managed and monitored from anywhere, making maintenance and control more convenient.

  • Industrial-Grade Durability & Reliability
    Designed to withstand tough environments, extreme temperatures, and continuous use without failure.

Technical Information
Parameter
Value
Mounting Type
DIN-Rail, 100 × 110 × 23 mm
Number of Screw Contacts
24 (6 × 4), field-removable
DIN Rail Bus Connector
Yes, RS485
Environmental Protection Class
IP21
Operation Temperature (All Functions)
-40°C to +70°C
Operation Temperature (LCD Panel)
-10°C to +70°C
Input Voltage Range (Any Pin)
-0.5V to +40V DC
Total Max Current (GND & VCC Pins)
8A
Nominal power supply
9-30 VDC
Power Consumption (No Load)
<0.5W
DALI PSU Option
Unpowered
DALI Mode
Master, Slave, DT7
DALI Protocol Support
DALI-1, DALI-2, SR, Custom
RS485 Ports Bias, Termination
None
Communication Speed
Up to 250 Kbit
Communication Modes
Master, Slave, Custom
Supported RS485 Protocols
Modbus RTU, IEC 61850, DMX512, NMEA, Custom
External 2G-5G Modem Support
Yes, RS485, AT-Commands
Number of Individually Programable IO
16
Isolation
Not Isolated
Output Type
Power MOSFETs
Output Polarity
VCC/GND, Programmable
Max Output Current per Single I/O
2A
Pulse Generation
Yes, PWM, 1ms Resolution
Relay Activation Counter
Yes, 32-bit
Isolation
Not isolated
Input Polarity
VCC/GND, Programmable
Pulse Counter Mode
Yes, 32-bit, >1ms
Isolation
Not Isolated
Full-Scale Measured Voltage
3VDC, 10VDC (Programmable)
Full-Scale Resolution
12-bit
Resolution in 333mVAC Mode
8-bit (Positive Half-Sine Only)
Resistance Measurement with Internal BIAS
0-100KΩ, 5% Accuracy
Input Scaling
Yes, Programmable
Front Panel Options
None, LCD Touch Screen, Custom
Optional LCD Touch Screen
1.14”, 135×240 pixels, 24-bit color
Operation Temperature (LCD Panel)
-10°C to +70°C
PLC Mode Option
Yes, Proprietary Scripting Language
PLC Variables
4 KB
PLC Program Flash Memory
16 KB
Local, PC Connection
Yes, via USB-RS485 adapter, Modbus
Local, LCD/Touch Panel
Yes, limited functionality
Remote via 2G-5G Modem
Yes, via Modbus commands
OTA Firmware Upgrade
Yes
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