Acromag IP521-64 Octal Serial 422/485 Communication IndustryPack Module

The Acromag IP521-64 is an IndustryPack module that delivers eight asynchronous serial communication ports supporting RS-422 and RS-485 standards. Engineered for high-density industrial applications, this module combines independent port configuration, high data throughput, and intelligent interrupt management to streamline multi-port serial connectivity in ruggedized environments.

Technical Specifications

Serial Communication

• Eight asynchronous ports per module


• EIA/TIA-422B and EIA-485 standards supported


• Maximum 921.6 kbit/s per port


• Typical cable length up to 1200 m (4000 feet)


• Non-isolated configuration with common return connection Data Handling & Buffering


• 64-byte transmit FIFO and 64-byte receive FIFO per port


• Double-buffered or 64-byte FIFO mode selection


• Character size: 5 to 8 bits (software-programmable)


• Parity: odd, even, or none (software-programmable)


• Stop bits: 1, 1.5, or 2 bits (software-programmable)


• Industry-standard 16C654 UART with 16C450 compatibility mode Interrupt Control


• Individual control of transmit, receive, line status, data set, and flow control interrupts


• Unique interrupt vectors per port


• Priority shifting scheme prevents port blocking


• Detection: receiver line status (overrun, parity, framing, break), FIFO level thresholds, character time-out, Xon/Xoff Environmental & Reliability


• Operating temperature: 0 to 70 °C


• Storage temperature: -55 to 125 °C


• Relative humidity: 5 to 95% non-condensing


• Power: +5 V (±5%), 340 mA maximum


• MTBF: 3,532,745 hours at 25 °C (MIL-HDBK-217F, Notice 2) IndustryPack Compliance


• ANSI/VITA-4 1995 specification compliance


• Access times at 8 MHz clock: ID PROM read 250 nS (0 wait state), channel register 375 nS (1 wait state), interrupt register 500 nS (2 wait states)

Key Features

• Failsafe receivers with open/floating input protection


• Line-break and false start-bit detection


• Socketed termination and bias resistors

Compatibility & Integration Software support packages available for VxWorks and Windows environments.