PCL-740 RS-232/422/485 Current-loop Communication Card (PCL-740)
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.
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PCL-740 RS-232/422/485 Current-loop Communication Card Features
RS-232, RS-422, RS-485 or current-loop interface
16C550 UART with 16-byte FIFO
Transmission speeds up to 921.6 kbps
Flexible I/O address and IRQ selection
IRQ: 3, 4, 5, 6, 7, 9, 10, 11, 12 or 15
Complete RS-232 modem control signals
Supports 4-wire or 2-wire operation for RS-422/485
Automatic RS-485 data flow control
Space reserved for termination resistors
Supports Windows® 98/ME/2000/XP, Linux
Powerful and easy-to-use utility (ICOM Tools)
PCL-740 RS-232/422/485 Current-loop Communication Card Specifications
| General |
|---|
| Models | PCL-740/PCL-741/PCL-743/PCL-745/PCL-746+ |
| Card Interface | ISA |
| Certifications | CE |
| 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 A max. |
| | PCL-743,PCL-745:+5V@400 mA typical, 950 mA max. |
| | PCL-746+: +5 V @ 800 mA typical, 1.5 A max. |
| | ±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) |
| Communications |
|---|
| 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 to 3F8H (for PCL-740/741/743/745) |
| | From 000h to 3F8H (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 x 16C550 with 16-byte FIFO |
| | PCL-746+: 4 x 16C550 16-byte FIFO |
| | PCL-740: 1 x 16C550 with 16-byte FIFO |
| | PCL-741: 2 x 16C550 with 16-byte FIFO |
| Protection |
|---|
| Isolation Protection | 2500 VDC (PCL-741), 3000 VDC (PCL-745B/745S) |
| EFT Surge Protection | 2500 VDC (PCL-743S/745S) |
| Software |
|---|
| Bundled Software | ICOM Tools |
| Driver Support | Windows 98/ME/2000/XP, Linux |
| Environment |
|---|
| Operating Temperature | PCL-740,PCL-741,PCL-746+: 0 ~ 50° C (32 ~ 122° F) |
| | PCL-743, PCL-745: 0 ~ 65° C (32 ~ 149° F) |
External links for PCL-740
Ordering information for PCL-740 RS-232/422/485 Current-loop Communication Card
| Product code | Product options |
|---|
| PCL-740 | RS-232/422/485 Current-loop Communication Card |
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