STMicroelectronics STEVAL-IAC001V1

Overview

STEVAL-IAC001V1 from STMicroelectronics is a modular alarm system evaluation board serving as a complete reference platform for low- to mid-tier security systems. It features an 8-zone hardwired central unit (CU), expandable via RS-485 bus to 11 inputs and 7 outputs, 16 configurable partitions, autobalancing inputs, and encrypted bus communication - deployed in residential intrusion detection and small commercial security installations.

For engineers reviewing the STEVAL-IAC001V1 datasheet, STEVAL-IAC001V1 pinout, STEVAL-IAC001V1 application, or STEVAL-IAC001V1 equivalent, this board delivers validated hardware/software integration for alarm system prototyping, partitioned zone management, tamper/fire line monitoring, and GSM/RFID expansion readiness - with PC GUI-based configuration and real-world bus noise immunity per RS-485.

Technical Context

The STEVAL-IAC001V1 implements a distributed BUS architecture using RS-485 physical layer (2-wire data + 2-wire power) for deterministic, noise-immune communication between CU, I/O expansion modules, GSM, RFID, and keyboard peripherals. Its ST72321BJ9 microcontroller executes partition logic, zone grouping, output timing control, and tamper/fire line polling independent of system armed/disarmed state.

Hardware-level security includes encrypted bus protocol, dedicated TAMPER loop wired in series across all sensors, and isolated fire/smoke input with immediate leak signaling regardless of CU operational status. Outputs are mixed-type: four SSR-driven (VN340SP-E, 1A each), two transistorized status indicators, and one micro-relay for auxiliary functions like VCR/GSM triggering.

Key Specifications

Availability

STEVAL-IAC001V1 is available at Aetrix Electronics and suitable for residential security prototyping, small commercial alarm system validation, and embedded security module development requiring stable component supply and field-proven bus architecture.

Supply support for STEVAL-IAC001V1 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 devices, sensors, and analog ICs for industrial, automotive, and consumer applications.

The STEVAL-IAC001V1 belongs to ST's ST EVAL family of application-specific evaluation platforms, developed to accelerate secure, scalable, and standards-compliant alarm system design for professional security integrators and embedded security product teams.

FAQ

What is the role of the RS-485 bus in the STEVAL-IAC001V1 system?

The RS-485 bus serves as the physical backbone for deterministic, noise-immune communication between the Central Unit and expansion modules (I/O, GSM, RFID, keyboard). Its 4-wire implementation (2 for power, 2 for differential signaling) eliminates external power supplies for peripherals and ensures reliable operation in electrically noisy security environments.

How does the TAMPER line function on the STEVAL-IAC001V1?

The TAMPER line is a dedicated, normally-closed loop wired in series across all connected sensors and devices. Any break in the loop - caused by enclosure opening or cable cut - triggers immediate tamper alert generation by the CU, independent of system arming status, providing physical intrusion detection at the wiring level.

Can the STEVAL-IAC001V1 support fire detection integration?

Yes - it includes a dedicated fire/smoke input line continuously monitored by the CU. This input operates independently of system armed/disarmed state and signals fire events immediately upon line fault or threshold violation, enabling life-safety response even when the alarm system is disarmed.

What expansion options are natively supported by the STEVAL-IAC001V1?

The CU board includes a pre-routed connector for GSM module integration and supports I/O expansion boards, RF-ID readers, smart-card interfaces, and keyboards - all communicating over the same RS-485 bus. Expansion requires no hardware modification and is managed entirely through the PC GUI configuration tool.