PCI-ICOM Series 2-port & 4-port isolated RS-422 & RS-485 Serial Adapters COMM Port Compatibility Both cards utilize the 16550 UART as the Asynchronous Communication Element (ACE). This UART includes a 16-byte transmit/receive buffer to protect against lost data in multi-tasking operating systems, while maintaining 100% compatibility with the original PC serial port. The system assigns the addresses. A crystal oscillator permits precise selection of baud rates up to 115,200 or, by changing a jumper, up to 460,800. The driver/receiver used, the SN75176B, is capable of driving extremely long communication line at high baud rates. It can drive up to ±60mA on Description balanced lines and receive inputs With four cards in the series, the PCI-ICOM422/4, PCI-ICOM422/2 support RS- as low as a 200mV differential 422 communications, the PCI-ICOM485/4 and the PCI-ICOM485/2 support RS- signal superimposed on common 485 communications, all the cards utilize differential balanced drivers for long range mode noise of +12V to -7V. In case and noise immunity. The data lines are opto-isolated from the computer and from of communication conflict, the each other to ensure communication when large common mode noise is present. driver/receivers feature thermal Models PCI-ICOM422/4 and PCI-ICOM422/2 has the capability to add load shutdown. resistors to terminate the communication lines. RS-422 communications requires that a transmitter supply a bias voltage to ensure a known “zero” state. Receiver inputs Communication Mode ate each end of the network should be terminated to eliminate “ringing”. All cards The PCI-ICOM422/4 and PCI- support biasing by default and support termination by jumpers on the card. ICOM422/2 supports Full-Duplex RS-485 operation, using the Models PCI-ICOM485/4 and PCI-ICOM485/2, and Half-Duplex communications involves switchable transceivers and the ability to support multiple devices on a with a 4-wire cable connection. single “part-line”. The RS-485 specification defines a maximum of 32 devices Half-Duplex allows traffic to travel on a single line. PCI-ICOM485/4 and PCI-ICOM485/2 only support half duplex, but in both directions, but only one has support for Auto-RTS in Windows 95/98/NT. way at a time. The PCI-ICOM485/ 4 and PCI-ICOM485/2 only supports Half-Duplex communications with a 2-wire cable connection. RS- 485 communications commonly use the half-duplex mode since they share only a single pair of wires. Features · Two and four optically isolated RS-422 and RS-485 ports · Baud rates up to 460.8kbs · Supports full-duplex & half-duplex communications · Supports Auto-RTS in Windows on RS-485 models · No base address or IRQ switches to set Support · Superior pre- and post-sales technical support · All products carry a two year warranty www.icsadvent.com 800-523-2320 Specifications PCI-ICOM Series Dimensions Card 12.83 x 3.84-inches Number of Ports (311.9 x 97.5mm) Four RS-422 on PCI-ICOM422/4 I/O Connection Four RS-485 on PCI-ICOM485/4 Auto-RTS Transceiver Control 18" fanout cable with DB-9P connections Two RS-422 on PCI-ICOM422/2 In RS-485 communications, the driver from single DB37. Connection on rear Two RS-485 on PCI-ICOM 485/2 must be enabled and disabled as of board Communication IC needed, allowing all cards to share a Isolation 16550 UART two wire cable. The PCI-ICOM485/4 500VDC Character Length and PCI-ICOM485/2 card controls the 5, 6, 7, or 8 bits Environment driver automatically. With automatic Parity Temperature Range Operating control, the driver is enabled when Even, odd, or none 0 ° to +60 °C data is ready to be transmitted. The Stop Interval Storage driver remains enabled for one 1, 1.5, or 2 bits -50 ° to +120 °C additional character’s transmission Serial Data Rates Humidity time after data transfer is complete Up to 460.8kbps 5 to 95% RHNC and then is disabled. The receiver is Address also normally enabled, then disabled Continuously mappable within 0000 to Ordering Guide FFFFh range of PCI bus addresses during RS-485 transmissions, and then PCI-ICOM42 2/4 Receiver Input Sensitivity re-enabled after transmission is 4-port isolated 422 card, CD with ±200mV, differential completed (plus one character software and manual, cable Common Mode Rejection transmission time). The PCI-ICOM485/ PCI-ICOM485/4 +12V to Œ7V 4 automatically adjusts its timing to 4-port isolated 485 card, CD with Transmitter Output Drive the baud rate of the data. This feature software and manual, cable 60mA, with thermal shutdown makes the card ideal for Windows 95/ PCI-ICOM422/2 Power Requirements 98 operations. 2-port isolated 422 card, CD with +5VDC @ 125mA software and manual, cable +12VDC @ 5mA PCI-ICOM485/2 -12VDC @ 5mA 2-port isolated 485 card, CD with software and manual, cable Corporate Headquarters ICS Advent 6260 Sequence Drive San Diego, CA 92121-4371 Phone: 800 523-2320 Fax: 858 677-0898 Email: sales@icsadvent.com support@icsadvent.com Website: www.icsadvent.com International Headquarters ICS Advent Europe Ben Turner Industrial Estate, Unit 9 Oving Road, Chichester West Sussex, PO19 4ET, UK Phone: + 44 (0) 1243 523500 Fax: + 44 (0) 1243 532949 Email: sales@icsadvent.co.uk support@icsadvent.co.uk Website: www.icsadvent.co.uk www.icsadvent.com 800-523-2320 ©2000 ICS Advent. All rights reserved. 1828-060600