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PC-425 User’s Manual

June 11th, 2009 · No Comments

The PC–425 is a compact, single–board computer that is a complete PC based control and data acquisition system. Using a 486SLC processor, the PC–425 is a high performance, low cost solution for an industrial, embedded PC. It will interface with existing PC, Opto MUX, Pro Mux, Micro DAC and uMac systems. The PC–425 is programmable in any PC language, including C, QuickBASIC, and ladder logic.

The PC–425 can be connected in a low–cost network with up to 32 other PC–425s to control 1,024 points. The network communicates at up to 115 KBaud. The points may be digital I/O; high voltage AC/DC I/O; or analog I/O like thermocouples and 4–20 mA outputs.

ROM–DOS Operating System
The PC–425 is an “instant DOS” system. The card includes 5.0 compatible DOS in a solid–state disk. If you wish to use your own operating system, you may install it with your application. The system boots and operates the same way as your desktop PC.

COM1 and COM2 Serial Ports
Both serial ports are 16450 compatible. The baud rates are programmable to 115 KBaud. Both have jumperable RS–232/422/485 interfaces. LEDs indicate transmit–and–receive activity. Both ports operate in half and full duplex. The RS–422/485 port on COM1 is opto–isolated with a 500V rating.

On–card Opto Module Rack
The eight position on–card opto module rack accepts both digital and analog I/O modules. The digital and analog I/O can be expanded to 32 lines by connecting an MPC–24 opto rack. Lines can be programmed as inputs or outputs in groups of four and eight. Sixteen of the 24 I/O lines can also drive external devices that require up to 100 mA per device and up to a 50V power supply. Thus, relays, small motors, displays, and other devices can be driven directly by the system. The outputs act as switches…

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