features www.advantech.com/products online download all product specifications are subject to change without notice last updated : january 2005 8-port intelligent rs-232/422 isa communication card PCL-844+ ? risc processor (tms 320) ? 512 kb dual-port ram ? transmission speed up to 921.6 kbps with eight ports on-line ? complete rs-232 modem control signals ? maps to just 16 kb of system memory. choose one of six addresses from c8000 to dc000. ? many irq options: 2, 3, 4, 5, 7, 10, 11, 12 or 15 ? easy-to-use menu driven installation program ? leds on connection box let you monitor the txd/rxd status of any port ? links to peripherals up to 1200 m (4000 ft) from controller (rs-422) ? surge protection: 2500 v esd , 2000 v eft (optional) speci?cations board ? number of ports 8 ? processor risc, ti tms320c203-57 ? dual-ported ram 512 kb ? sram 16 kb ? uart risc-based cd180 ? interrupt 2, 3, 4, 5, 7, 10, 11, 12 or 15 ? maximum ports in 32 one system ? operating temperature 0 ~ 55 c (32 ~ 131 f) ? power consumption +5 v @ 155 ma, +12 v @ 110 ma, -12 v @ 160 ma ? weight 0.8 kg (1.8 lb) rs-232 interface ? signals txd, rxd, rts, cts, dtr, dsr, dcd and gnd ? mode asynchronous full duplex ? communication speed 50 bps ~ 921.6 kbps ? data bits 5, 6, 7, 8 ? stop bits 1, 1.5, 2 ? parity even, odd or none introduction the intelligent PCL-844+ was designed as a 8-port rs-232 or rs-422 interface card for lab and industrial applications where a pc needs to communicate with terminals, modems, or other instruments. rs-422 applications use the optional opt-8f/8z 8-port rs-232 to rs-422 converter, shown on the following page. you can install up to four PCL-844+ cards for a total of 32 ports in any at/lsa bus-based pc. the PCL-844+ card has an on-board risc processor that takes over the communications load from the host pc. when you are processing large amounts of data from multiple ports, servicing the interrupts alone consumes a large percentage of the capacity of your computer's cpu. the PCL-844+ serves as a high speed, dedicated interrupt processor. its cpu directly controls the board's cd180 risc-based uart, guaranteeing 921.6 kbps performance of over eight high-speed data ports. PCL-844+ is virtually a self contained computer in its own right. it contains 512 kb of dual-port ram which you can use to store and run programs. the dual-port ram maps into the host system's address space to give you the fastest possible data transfers between PCL-844+ and the pc memor y. when the PCL-844+ initializes, it downloads the driver software (which functions like a pc's bios) into on-board sram. this improves performance and makes version upgrading easy, with no hardware redundancy. ordering information ? PCL-844+ 8-port intelligent rs-232/422 card, with isa bus ? opt8a 8-port rs-232 (dce) connection box with female db25 connectors ? op8b 8-port rs-232 (dte) connection box with male db25 connectors ? 0pt8c 8-port rs-232 connection cable with male db25 connectors ? opt8h 8-port rs-232 connector cable with male db9 connector (1m length)
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