The AIM 104-COM4 is an 8-bit or 16-bit PC/104 module providing up to four 16C550 serial asynchronous communications channels: two of optically isolated RS422 or RS485 and two of RS232.
Isolation
It provides 100V input-to-output isolation and 100V inter-channel isolation for RS422/RS485 serial ports.

Architecture:

• PC/104 compliant

Serial ports:

• 2x RS232
• 2x opto-isolated (RS422 or RS485):

  - RS422 Point-point
  - or RS422 Multi-drop
  - or RS485

• 16C550 UARTS

Baud Rate:

• Up to 115.2 Kbaud

Address Select:

• Standard PC AT ports COM1, 2, 3 and 4 or selectable 0-3F0h

IRQ Select:

• IRQ3, 4, 5, 7, 9, 10, 11, 15

Isolation RS422/485:

• 100V minimum

General Features:

• TxD & RxD data; Cts, RTS, DCD and DTR control lines
• Addressing using standard PC-AT COM 1-4 addresses, or user selectable
• Module access LED
• Supplied with a 50-way to 4 male 9-way D-types
• 100V input-to-output isolation; 100V inter-channel isolation

Bus:

• PC/104 (ISA)

Power Supply:

• Single +5V DC

Power Consumption:

• 1.1 W typical

Mechanical:

• Dimensions: 96mm (3.8”) x 90mm (3.5”)
• PC/104 format

Operating Temperature:

• -25°C to 70°C

MTBF:

• 226,000+ hours (MIL-HBDK-217F @ ground benign)

Software Support:

• FREE Integrated I/O 'C' Library on disk

Supported Operating Systems:

• Standard operating systems such as MS-DOS, ROM-DOS and Microsoft Windows®