This modular base controller serves as the core processing unit for small to mid-sized automation systems. The Schneider TSX3721100 integrates a powerful CPU with built-in communication ports for versatile connectivity. It supports up to 256 I/O points across multiple remote drops for flexible system expansion. The controller executes logic programs rapidly, processing 1,000 boolean instructions in just 0.3 milliseconds. Its modular design allows you to add memory or communication options as application demands evolve.
Physical Dimensions and Mechanical Design
The controller measures 130 mm in height, 120 mm in depth, and 45 mm in width. This compact footprint fits comfortably inside standard control panels without consuming excessive space. Weighing approximately 0.65 kg, the TSX3721100 offers a sturdy yet manageable form factor. A robust metal chassis provides excellent protection against electromagnetic interference. This chassis design also shields internal components from physical shock and vibration.
Technical Specifications at a Glance
| Specification | Detail |
|---|---|
| Processor Type | 16-bit microcontroller |
| I/O Capacity | Up to 256 points (local + remote) |
| Program Memory | 64 KB (flash) |
| Data Memory | 32 KB (RAM) |
| Execution Speed | 0.3 ms (for 1,000 boolean instructions) |
| Dimensions (H × W × D) | 130 mm × 45 mm × 120 mm |
| Weight | 0.65 kg |
| Communication Ports | 1 x RS-232, 1 x RS-485 |
| Programming Port | Mini-DIN (front panel) |
| Backplane Current | 300 mA at 5 VDC |
| External Supply | 24 VDC ±10% |
| Power Dissipation | 6.5 W |
| Energy Buffer | 220 µF capacitor (15 ms hold-up) |
| Built-in Clock | Real-time clock (battery-backed) |
| Temperature Range | -25 °C to +65 °C |
| Humidity Range | 5% – 95% RH (non-condensing) |
| Standards | IEC 61131-2, UL 508, CSA |
| Protection Rating | IP20 |
Communication Interfaces and Connectivity
A built-in RS-232 port supports direct connection to programming terminals or HMI devices. An additional RS-485 interface enables multi-drop networking with external peripherals and drives. The front-mounted mini-DIN port provides convenient access for on-site programming and firmware updates. Two status LEDs indicate CPU run/stop states and communication activity clearly. A removable terminal block simplifies field wiring for the external power supply connection.
Power Architecture and Energy Storage
The controller draws 300 mA from the 5 VDC backplane for internal logic operations. It also needs a 24 VDC ±10% external supply for driving connected output modules. An internal 220 µF capacitor provides energy buffering against momentary power interruptions. This capacitor sustains processor operation during supply dips of up to 15 milliseconds. Total power dissipation under full load measures 6.5 W, minimizing heat buildup.
Internal Component Architecture
The TSX3721100 incorporates a 16-bit microcontroller with an integrated math coprocessor. A 64 KB flash memory stores user application programs and operating system firmware securely. Another 32 KB of RAM provides workspace for data tables and runtime variables. The main PCB contains a real-time clock powered by a replaceable lithium battery. One hundred twenty surface-mount resistors and 72 ceramic capacitors populate the board for signal conditioning. A watchdog timer continuously monitors software execution to prevent system lock-ups.
Environmental Performance and Certifications
This controller operates reliably from -25 °C to +65 °C across demanding factory environments. It also performs consistently in humidity conditions from 5% to 95% without condensation. The TSX3721100 complies with IEC 61131-2, UL 508, and CSA safety standards. These certifications ensure dependable integration into worldwide industrial control applications.
Details
| Weight | 0.65 kg |
|---|---|
| Dimensions | 130 × 45 × 120 mm |
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