PC/104 8-port RS-232/422/485 serial + 8 DIO

  • Description
  • Specifications
  • Ordering Guide

EMM-8P offers 8 multi-protocol serial ports on a single PC/104 module with complete software configurability via the operating system. Each port can be individually selected for RS-232, RS-422, or RS-485 under software control. Both local-echo and non-local-echo modes are supported for RS-485. I/O addresses and interrupt levels are also programmable, with interrupt sharing available for any number of ports. Each port may further be enabled or disabled in software. All configuration data is stored in an on-board EEPROM that is loaded automatically on power-up.

EMM-8P also offers 8 convenient digital I/O lines. The direction of each line is independently programmable.

Number of serial ports 8-ports
Protocol RS-232, RS-422, RS-485 (jumper selected)
Control Signals RS-232: DTR, DSR, RTS, CTS, RI, TxD, RxD, DCD
RS-422/485: TxD±. RxD±
Maximum baud rate Up to 460.8 Kbps
I/O Addresses Jumper selectable I/O addresses
Interrupts Jumper selectable IRQ
Number of DIO 8 programmable
DIO Input Voltage Low: -0.3V min, 0.8V max.
High: 2.0V min, 5.3V max.
DIO Output Voltage Low: 0.0V min, 0.4V max (IOL = 6mA max.)
High: 3.7V min, 5.0V max (IOH = -4mA max.)
Bus PC/104
Dimensions 90 x 96 mm
Power supply +5VDC ±5% @ 160mA max.
Operating Temperature -40 to +85°C


Model Description
EMM-8P-XT PC/104 8-port RS-232/422/485 + 8 DIO