The PCL-745 series card provides two RS-422/485 serial ports.Each port utilizes a 16C550 UART with an on-chip 16-byte FIFO buffer for reliable, high-speed serial I/O. The UART buffer divides data into 16-byte packets before sending them onto the bus. This drastically reduces the CPU load and avoids data loss due to failure to respond to the interrupt request in time. The UART is especially useful for high speed serial I/O under Windows. The PCL-745S card differs from the PCL-743S card in that the former uses on-board optical isolators to protect your PC and equipment against damages from ground loops, increasing system reliability in harsh environments. To further increase reliability, the PCL-745S offers surge protection technology, protecting your system from abrupt high voltage surges (up to 2500 V) such as those caused by lightning.
Card Interface ISA
Connectors PCL-740: 1 x DB9-M, 1 x DB25-M
PCL-741, PCL-743, PCL-745: 2 x DB9-M
PCL-746+: 1 x DB37-F
Dimensions 185 x 100 mm(7.3" x 3.9")
Power Consumption PCL-740: +5 V @ 180 mA max., ±12 V @ 20 mA max.
PCL-741: +5 V @ 300 mA (typical), +5 V @1.1 Amax.
PCL-743,PCL-745:+5V@400 mA typical, 950 mA max.
PCL-746+: +5 V @ 800 mA typical,1.5 Amax.
±12 V @ 60 mA typical, 120 mA max.
Weight (Gross) PCL-740,PCL-741, PCL-743, PCL-745:0.6 kg(1.3 lb)
PCL-746+:1.1 kg(2.4 lb) (including cable)
Data Bits 5, 6, 7, 8
RS-232: Tx, Rx, CTS, RTS, DTR, DSR, DCD,GND,RI
Current loop:Tx+,Tx-, Rx+, Rx-
RS-422: Tx+, Tx-, Rx+, Rx-, GND, CTS+, CTS-, RTS+, RTSRS-
485: Data+, Data-, GND
I/O Address From 200H to3F8H (for PCL-740/741/743/745)
From 000h to3F8H (for PCL-746+)
IRQ 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15
Ports PCL-740: 1, PCL-741: 2
PCL-743, PCL-745: 2
Parity None, even, odd
Protocols PCI-740: RS-232/422/485, current-loop
PCI-741: RS232, current-loop
PCI-743, 745: RS-422/485
Speed PCL-740, PCL-741: 50 bps ~115.2 kbps
50 bps~57.6 kbps (current-loop)
PCL-743, PCL-745: 50 bps ~ 921.6 kbps
PCL-746+: 50 bps ~ 115.2 kbps
Stop Bits 1, 1.5, 2
UART PCL-743, PCL-745: 2 x16C550 with 16-byte FIFO
PCL-746+: 4 x16C550 16-byte FIFO
PCL-740: 1 x16C550 with 16-byte FIFO
PCL-741: 2 x16C550 with 16-byte FIFO
Isolation Protection 2500 VDC (PCL-741), 3000 VDC (PCL-745B/745S)
EFT Surge Protection 2500 VDC (PCL-743S/745S)
Bundled Software ICOM Tools
Driver Support Windows 98/ME/2000/XP, Linux
Operating Temperature PCL-740,PCL-741,PCL-746+: 0 ~ 50° C (32 ~ 122° F)
PCL-743, PCL-745: 0 ~ 65° C (32 ~ 149° F)
PCL-740 RS-232/RS-422/RS-485/current-loop serial interface
PCL-741 Iso lat ed dual-port RS-232/current-loop interface card.
PCL-743B 2-port RS-422/485 communication card
PCL-743S 2-port RS-422/485 communication card with EFT
PCL-745B 2-port RS-422/485 communication card with isolation
PCL-745S 2-port RS-422/485 communication card with isolation
and EFT Surge Protection
PCL-746+ 4-port RS-232/422/485 communication card
(30cmDB37 to 4 DB25 cable included)
PCL-746+/9 4-port RS-232/422/485 communication card
(30cmDB37 to 4 DB9 cable included)