User Manual

Documentation No.3PXCC1x-2x-3903 1
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph [phone] – Fax [phone]
Chapter 1: Introduction and General Information
The B&B Electronics’ 3PXCC series serial interface cards are
designed for the IBM PC, XT, AT and compatibles. Ports are
configured as a standard DTE device, and connections are made on
9-pin D-style connectors.
The 3PXCC cards offer exceptional setup flexibility. The 3PXCC
series has the ability to use any I/O address and any hardware
interrupt. You can install as many serial ports as will physically fit in
a machine. To use one of the “non-standard” addresses or
interrupts, the serial software used must also offer that flexibility. If
you are writing your own application, be sure the communications
routines used support any address and IRQ. B&B Electronics’
SimpCom Communications Drivers support these features.
Features
• Switch selectable addresses, from 0 to hex 3F8, including
COM1 – COM4
• Jumper selectable interrupts: 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, 15
• Enhanced 16 bit Address Decoding
• Baud rates up to 230.4K baud with 2X clock option enabled
• 16550A UARTs on all ports
• Supports all standard RS-232 lines: TD, RD, RTS, CTS, DSR,
DCD, DTR, and RI
Specifications
Bus: IBM PC ISA Bus
Slot: Requires 1 full length slot for complete IRQ selectability. When
installed in a short slot, IRQ’s 10-15 will not be available.
Dimensions: 6.3 x 3.3 in (16.0 X 8.4cm)
I/O connection: 9-pin male, D-sub connectors
Baud rates: 230,400 baud max with 2x clock jumper enabled
Character length: 5, 6, 7, or 8 bits
Parity: Even, odd or none
Stop bits: 1, 1.5, or 2
Interrupt: IRQ 2, 3, 4, 5, 6, 7, 10, 11, 12, 14, or 15
Address: Switch programmable, 0 to hex 3F8
2 Documentation No.3PXCC1x-2x-3903
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax [phone]
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph [phone] – Fax [phone]
RS-232 Drivers:
Device: SN75185
Transmitter output voltage: ± 10.0 V minimum
Short circuit current: ±12 mA typical
Input low level threshold voltage: 0.65 V minimum
Input high level threshold voltage: 2.5V maximum
Device will withstand ±30 V
RS-422/485 Driver/Receiver:
Device: MAX491 or equivalent
Differential driver output voltage: 1.5 - 6 V
Differential input high-threshold voltage: 0.2 V maximum
Differential input low-threshold voltage: -0.2 V minimum
Automatic RS-485 Driver Control Timing:
Driver is enabled when data is a logic “0” (start bit). Driver
remains enabled for one character transmission time (10 bits
of
data at current baud rate). Each additional logic “0” resets
the timeout.
Power Consumption (2-port model):
+5V, 180mA, 900mW
+12V, 50mA, 600mW
-12V, 65mA, 780mW
Total maximum power draw: 2.28 W