STMicroelectronics STEVAL-IFP004V1

Overview

STEVAL-IFP004V1 from STMicroelectronics is an evaluation board designed to validate the PCLT-2A dual-channel 24 V DC digital input termination IC for industrial I/O modules. It implements two independent channels with input-voltage protection, serial current-limiting circuits, and CMOS/optocoupler output drivers, operating across a wide industrial voltage range and featuring robust EMC performance.

For engineers reviewing the STEVAL-IFP004V1 datasheet, STEVAL-IFP004V1 pinout, STEVAL-IFP004V1 application, or STEVAL-IFP004V1 equivalent, this board supports rapid validation of sensor interface termination, current-limited input staging, isolated vs. non-isolated output selection, and IEC-type programmable configuration in PLC and distributed control systems.

Technical Context

The board hosts two identical PCLT-2A channels, each integrating input clamping (via SM4005 diodes), adjustable current limiting (using 30 kΩ/750 Ω resistor networks), and dual-output capability-CMOS (OUT1/OUT2) and optocoupled (Opto1/Opto2)-with separate VDD_A/VDD_B supply domains. Reference voltage generation (VC, REF) and comparator monitoring (COMp) enable precise threshold control.

Each channel accepts 24 V DC sensor inputs (IN1/IN2), provides LED status indication (LED1/LED2), and supports flexible termination configurations via external capacitor selection (Cc_A/Cc_B = 33 nF, Cin_A1/Cin_A2 = 22 nF) and current-set resistors (Rc_A/Rc_B = 2.2 kΩ), aligning with IEC 61000-4 immunity requirements.

Key Specifications

Availability

STEVAL-IFP004V1 is available at Aetrix Electronics and suitable for industrial PLC design, factory automation I/O module development, and sensor interface validation requiring stable component supply and documented reference implementation.

Supply support for STEVAL-IFP004V1 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 specializing in microcontrollers, power management, analog ICs, and industrial interface solutions with broad automotive and industrial design engagement.

The STEVAL-IFP004V1 belongs to ST's Industrial Interface Evaluation Kit product line, engineered to accelerate adoption of programmable digital input terminations in modular I/O systems compliant with IEC 61131-2 and IEC 61000-4 standards.

FAQ

What is the primary function of the STEVAL-IFP004V1 evaluation board?

The STEVAL-IFP004V1 is a dedicated hardware platform for evaluating the PCLT-2A dual-channel digital input termination IC. It enables functional verification of 24 V DC sensor interface protection, programmable current limiting, and dual-output (CMOS + optocoupler) signal conditioning in industrial I/O applications without custom PCB development.

Does the board support both isolated and non-isolated output configurations?

Yes - each channel provides parallel CMOS-level outputs (OUT1/OUT2) and optocoupler-isolated outputs (Opto1/Opto2), with independent VDD_A/VDD_B supplies. The schematic shows discrete jumper-selectable paths, allowing simultaneous or selective use of either output type per channel during testing.

What external components define the current-limiting behavior on this board?

Current limiting is set by the RC network per channel: Rc (2.2 kΩ) in series with the PCLT-2A internal limiter, plus Dnw (30 kΩ) and Rin (750 Ω) forming a voltage divider that adjusts the current-sense reference. Values are fixed on the board but match PCLT-2A's programmable range (10–30 mA typical).

Can the STEVAL-IFP004V1 be used with sensors other than proximity switches?

Yes - it supports any 24 V DC digital sensor with open-collector or PNP/NPN output, including photoelectric sensors, limit switches, and flow meters. Input protection (SM4005), filtering (22 nF Cin), and configurable thresholds make it adaptable to diverse industrial field devices meeting IEC 61131-2 Type 1/3 specifications.