PCI-COM485/4 and PCI-COM485/4S1
Serial Interface Cards
Features
- Universal PCI, PCI-X, 3.3V and 5V compatible (Call for PCI-Express availability)
- Four-port serial communications card for PCI bus
- Supports RS-485 multidrop networks
- Includes type 16550 UART with 16-byte FIFO buffers
- Baud rates up to 460,800 baud
- Automatic control of RS-485 driver under Windows sytems
- Choice of I/O connection methods
- No base address or IRQ switches to set
There are two I/O Connector options. Model PCI-COM485/4 includes a single 25-pin connector on the mounting bracket plus a “spider” or breakout cable that terminates in four 9-pin D-type male connectors. Thus, this version only requires one I/O slot. The standard model PCI-COM485/4 S1 includes two 9-pin male connectors on the card mounting bracket plus a second mounting bracket with two more 9-pin male connectors plus ribbon cables to connect them to the headers on the card.
Each independent port supports RS-485 balanced mode transmission/reception. Each port has the capability to add bias voltage. (RS-485 communication requires that one transmitter in the network must supply a bias voltage to ensure a known "zero" state when all transmitters are OFF.) Also, receiver networks at each end of the networks should be terminated to eliminate ringing. These cards support that need by means of jumpers on the card.
Type 16550 UARTs are used as the asynchronous communication elements. These include a 16-byte transmit/receive FIFO buffer to protect against lost data in multitasking systems while maintaining 100% compatibility with the original IBM port.
A crystal oscillator is located on the card and permits precise baud rate capability up to 115,200. Higher baud rates, up to 460,800 baud, are achieved by changing a jumper on the card. The driver/receiver used, type 75176, is capable of driving extremely long communications lines at high baud rates. They can drive up to +/- 60 mA on balanced lines and receive inputs as low as 200 mV differential signal superimposed on common mode noise of +12V to -7V. In case of communication conflict, the driver/receivers feature thermal shutdown. PCI-COM485/4 supports Half-Duplex communications with two-wire cable connections. Half-Duplex allows traffic to travel in both directions, but only one way at a time.
When the card is first installed, Windows will detect it as new hardware and assign it an IRQ number and base address. There are no switches to set or base addresses to assign, making it easy to use. From this point on, the card behaves as standard COM ports at COM 5,6,7, and 8. You cannot set or change the card's base address, you can only determine what the system has assigned. The PCI Bus supports 64K of I/O address space so your card's address may be located anywhere in the 0000 to FFFF range.
AUTO RTS TRANSCEIVER CONTROL
Specifications
Communications Interface
- I/O Connection: 9-pin D-sub connectors.
- Serial Ports: Four shielded male D-sub 9-pin IBM AT style connectors compatible with RS-485 specifications. (Note: On model COM485/4, the breakout cable terminates with four female D-sub 9-pin connectors.)
- Character length: 5, 6, 7, or 8 bits.
- Parity: Even, odd or none.
- Stop Interval: 1, 1.5, or 2 bits.
- Serial Data Rates: Up to 115,200 baud, Asynchronous, A faster range of rates, up to 460,800, is achieved by jumper selection on the card. Type 16550 buffered UART.
- Address: Continuously mappable within 000 to FFFF (hex) range of PCI bus addresses.
- Receiver Input Sensitivity: ±200 mV, differential input.
- Common Mode Rejection: +12V to -7V
- Transmitter Output Drive Capability: 60 mA, with thermal shutdown.
Environmental
- Operating Temperature Range: 0 o to +60 o C
- Storage temperature Range: -50 o to +120 o C
- Humidity: 5% to 90%, non-condensing.
- Power Required: +5VDC at 125 mA typical, -12VDC at 5 mA typical, +12VDC at 5 mA typical, 750 mW total power consumption.
- Size: 7.82" (198 mm) long by 3 7/8" (99 mm)
Regulatory Compliance
- This product is in full compliance with CE requirements.
| Model | Price (USD) |
|---|---|
| PCI-COM485/4 | 294.00 |
| PCI-COM485/4S1 | 259.00 |
Available Reference Manuals
- View / Download the PCI-COM-485-4 Manual (.PDF)
- View / Download the Software Reference Manual (.PDF)
Available Software Downloads
Further information about available ACCES Software:
- Drivers And Operating Systems
- What drivers and other support we provide for various operating systems.
Setup Programs, Samples, And Utility Software- A description of the software package that comes with each ACCES card.
Redistributing Windows Drivers- A list of ACCES drivers and the files that compose them under different versions of Windows, so you can easily redistribute ACCES cards and drivers.
Custom Software Services- A description of some of our custom software offerings. Did you know we offer free programming services to qualifying customers?