Eight Port RS422/485 Communication Module AP522

The AP522 Series is an AcroPack® Module that contains eight RS422/485 Serial Ports from a single AcroPack Carrier slot offering a high density solution. It has a PCIe Bus Interface with extended temperature range.

Ideally used in Automation, Defence, Aerospace and Research Labs.

The Acromag AP522 Series is an Eight Port RS422/485 Serial Communication Module and enables efficient data processing through the eight RS422/485 Serial ports.

Firstly, the AP522 Series is based on the Acromag AcroPack® product line, which has a PCIe interface format. AcroPack® offers products in a compact size, at a low cost with the same functionality and memory map of existing Industry Pack Modules in a rugged form factor. Also they are RoHS compliant.

Secondly, to conduct more efficient data processing, each serial port has a 256-character FIFO buffers on the transmit and receive lines. The data ports generate individually controlled transmit, receive, line status and data set interrupts. All interrupts can be read from a single register. Software-configuration helps you quickly set baud rates, character-sizes, stop bits, and parity. RTS/CTS handshake support for modem control is also included.

Finally, the AP522 modules are 70mm long and only 19.05mm longer than a full length mini PCIe card. It contains a down facing connector which internally routes I/O signals through the carrier card to secure field connectors. Therefore, eliminating loose cables and increasing reliability.

Features of Eight Port RS422/485 Serial Communication Module AP522 includes:

  • Eight asynchronous, full duplex RS422B serial ports (supports RS485)
  • 256-byte transmit FIFO buffers, 256-byte receive FIFO buffers
  • Programmable baud rate (up to 20Mbps)
  • Individual handshake lines (RTS, CTS) on each channel
  • Line-break and false start-bit detection
  • Failsafe receivers
  • As well as built-in termination and bias resistors (Consult factory for no termination)
  • 16550 compatible register set
  • Also a high-density design lowers per-port costs and saves IP carrier card slots for other functions.
  • 256-byte FIFO buffers minimise CPU interaction for improved system performance.
  • Extended temperatures deliver dependable operation in extreme conditions.



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