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BAS
8-port Intelligent RS-232
ISA Communication CardPCL-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 via OPT8FP to peripherals up to 1200 m (4000 ft) from controller
(RS-422)
Specifications
General
Card Interface ISA
Certifications CE
Connectors 1 x DB62-F
Dimensions 185 x 100 mm (7.3” x 3.9”)
Power Consumption +5 V @ 155 mA, +12 V @ 110 mA, -12 V @ 160 mA
Communications
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
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 have to use OPT8FP which is an 8-port RS-232 to RS-422 converter with 2,500 Vdc isolation protection. 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.
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 memory.
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.
Environment
Operating Temperature 0 ~ 55° C (32 ~ 131° F)
Storing Temperature -20 ~ 85° C (-4 ~185° F)
Storing Humidity 5~95% RH, non-condensing (refer to IEC68-2-3)
Ordering Information
PCL-844+ 8-port Intelligent RS-232 Card, with ISA bus
(cables not included)
Opt8AP 8-port RS-232 (DCE) connection box with female
DB25 connectors
Opt8BP 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 (1 m length)
Opt8FP 8-port RS-422 to RS-232 converter connection box
with isolation protection
Courtesy of Steven Engineering, Inc. ● 230 Ryan Way, South San Francisco, CA 94080-6370 ● General Inquiries: (800) 670-4183 ● www.stevenengineering.com
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