The PCL-740 offers a versatile range of high speed interfacing options. You can switch its single port between the popular RS-232, long distance RS-422, multi-drop RS-485, or noise-resistant current-loop. The card’s 16C550 UART has an on-chip 16-byte FIFO buffer for faster and more reliable communication, especially under Windows.
The card has two 16C550 UARTs with on-chip 16-byte FIFO buffers. The UARTs buffer data into 16-byte packets before sending it to the bus. This drastically reduces CPU load and avoids data loss when the system is busy and cannot process the interrupt quickly. These FIFO buffers make the PCL-741 especially suitable for high speed serial I/O under Windows. Onboard optical isolators protect your PC and equipment against damage from ground loops, increasing system reliability in harsh environments.
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: +5 V @ 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
Data Signals 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+, RTS-RS-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 PCL-746+: 4
Parity None, even, odd
Protocols PCI-740: RS-232/422/485, current-loop PCI-741: RS232, current-loop PCI-743, 745: RS-422/485 PCI-746+: RS-232/422/485
Speed PCL-740, PCL-741: 50 bps ~ 115.2 kbps (for RS-232/422/485)
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 card
PCL-741 Isolated 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 surge protection
PCL-745B 2-port RS-422/485 communication card with isolation protection
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 (30 cmDB37 to 4 DB25 cable included)
PCL-746+/9 4-port RS-232/422/485 communication card (30 cmDB37 to 4 DB9 cable included)