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Description  Specifications Technical Support Download PDF
Description 
Quatech's DSC-100 enhanced serial board provides two RS-232 serial ports on a single PCI board. As a PCI device, the DSC-100 requires no hardware configuration. The card is automatically configured by the computer's BIOS or operating system. The two serial ports share a single interrupt line and are addressed in a contiguous block of 16 bytes. A special interrupt status register is provided to manage the shared interrupt. The DSC-100 completely adheres to the PCI 2.1 specification, and all PCI registers are properly implemented, so users can be assured that the DSC-100 will not conflict with other properly implemented PCI devices.
The DSC-100 is implemented with two 16750 UARTs containing 64-byte FIFOs. It has a clock multiplying feature allowing the board to achieve data rates as high as 921.6 kbps. The high clock speeds and deep FIFOs will greatly reduce CPU overhead, making the DSC-100 an ideal choice for heavy multi-tasking environments.
To maintain maximum signal integrity, Quatech's DSC-100 uses a four-layer board design. But, for even more protection in industrial environments, an optional surge suppression package is available. This "IND" option, applies a surge suppressor to each line that is capable of sustaining up to 40A 20ms peak transient surges, a clamping voltage of 30V and a peak energy dissipation of 0.1 Joules. (Note that implementing the IND option restricts the board's speed to 115.2 kbps.) WE have 3 of the -IND Boards still available at August 2020 on clearance.....Call 1-877-902-2979 if interested)
Specifications
BUS INTERFACE: PCI
DATA RATE:
921.6 kbps up to 430 pF load
460.8 kbps up to 900pF load
230.4 kbps up to 1800pF load
115.2 kbps up to 4300pF load (IND option max. speed)
PORTS: 2
UARTs:
2 16750 UARTs with 64-byte FIFOs
TRANSMIT DRIVERS: SN75150 or compatible
High Level Output: 5V min, 8V typical
Low Level Output: -5V max, -8V typical
Switching Speed(low to high): 1.4 µs with 2500 pF load 40 ns with 15 pF load
Switching Speed (high to low): 1.5 µs with 2500 pF load 20 ns with 15 pF load
RECEIVE BUFFERS:MC1489 or compatible
High Level Output: 3V to 13V
Low Level Output: -3V to -13V
Switching Speed: 120 µs typical, 175 ns max
POWER REQUIREMENTS: 5 volts: 200mA(typ), 12V: 20mA (typ), -12V: 20mA(typ)
TEMPERATURE: Operating 0 to 70°C, Storage -50 to 80°C
HUMIDITY: 10% to 90%
CONNECTOR:
2 D-9 male connectors
Pinout:
PIN 1: Carrier Detect
PIN 2: Data Input
PIN 3: Data Output
PIN 4: Data Terminal Ready
PIN 5: Signal Ground
PIN 6: Data Set Ready
PIN 7: Request To Send
PIN 8: Clear To Send
PIN 9: Ring Indicator
OS SUPPORT: Windows 95/98/NT/2000 and OS/2.
CONFIGURATION: Windows does not assign COM1-COM4 to ports addressed at nonstandard locations. The DSC-100 will install in the lowest available address block over COM4. For example, COM 5-6, COM 6-7, etc.
OPTIONAL ACCESSORIES: CP-DS cable converts D-9 port to D-25.
  
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