STMicroelectronics STEVAL-SILPLC01

Overview

STEVAL-SILPLC01 from STMicroelectronics is a safety-certified industrial PLC evaluation board built around the STM32H723VG MCU, CLT03-2Q3 dual-channel digital input limiter, and IPS160HF high-side switch, delivering 2.5 A per output, 24–36 V main supply, and EtherCAT real-time communication for SIL 2/PL d applications in programmable logic controllers.

For engineers reviewing the STEVAL-SILPLC01 datasheet, STEVAL-SILPLC01 pinout, STEVAL-SILPLC01 application, or STEVAL-SILPLC01 equivalent, this board supports functional safety validation, IEC61508-compliant diagnostics, isolated sigma-delta modulation via ISOSD61, and firmware-integrated X-CUBE-STL self-test library certified by TÜV Rheinland.

Technical Context

The board implements a 1oo2 (one-out-of-two) architecture with dual digital inputs (CLT03-2Q3) and single high-side outputs (IPS160HF), enabling fault-tolerant sensing and actuation. Power management uses L7987L (61 V, 2 A buck regulator) and L7983 to generate isolated 3.3 V (MCU/connectivity) and 5 V (ISOSD61) rails.

EtherCAT slave functionality is realized through integrated RS485 PHY and firmware stack v5.0.8, supporting daisy-chain topology with MAC-based frame filtering. Six-layer PCB stack-up enhances EMC immunity per IEC61000, while hardware-level diagnostics include inductive load demagnetization and direct output monitoring.

Key Specifications

Availability

STEVAL-SILPLC01 is available at Aetrix Electronics and suitable for industrial automation, functional safety validation, and EtherCAT-based PLC prototyping requiring stable component supply, traceable sourcing, and lifecycle continuity.

Supply support for STEVAL-SILPLC01 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing microcontrollers, power ICs, sensors, and analog devices for industrial, automotive, and consumer markets.

This board belongs to ST's functional safety solution portfolio, engineered specifically to accelerate IEC61508-compliant PLC development with pre-assessed hardware, certified firmware libraries, and integrated safety mechanisms.

FAQ

What safety standards does STEVAL-SILPLC01 comply with?

STEVAL-SILPLC01 hardware has been formally assessed by TÜV Italia (TÜV SUD Group) to IEC61508 SIL 2, EN 62061, and EN ISO 13849-1 PL d. Assessment covers random hardware failure metrics, systematic capability, and architectural constraints - documented in report TI 722260614 Rev. 0 and TN1395.

Does the board include EtherCAT master or slave functionality?

STEVAL-SILPLC01 implements EtherCAT slave functionality only, using firmware stack v5.0.8. It supports daisy-chain topology via RS485 PHY, with MAC-based frame identification and process data channel for load control and diagnostic reporting - no master capability is integrated.

What power rails are generated on-board and how are they distributed?

The board generates 3.3 V (for STM32H723VG, connectivity, and temperature sensor) and 5 V (for ISOSD61 modulator) on the isolated side, plus 6 V for isolated peripherals. These are derived from L7987L/L7983 buck regulators fed by 24–36 V Vbus1/Vbus2 inputs, with post-regulation and voltage supervision.

Is X-CUBE-STL firmware included with the board?

X-CUBE-STL-H7 v1.2.0 is supported by the STSW-SILPLC firmware but not shipped pre-loaded. Access requires signing an NDA with STMicroelectronics; the library is TÜV Rheinland-certified and enables runtime self-tests of CPU, memory, clock, and peripheral functions per IEC61508 Part 3 Annex F.