Quatech DSC-200/300 user manual 10Specifications

10Specifications

Bus interface		PCI, 32-bit bus, 5-volt only
		IBM-compatible computers
Dimensions:		approx. 5.5" x 3.5"
Serial ports
Controller:		16750 with 64-byte FIFOs
Interface:		Two female D-9 connectors
Transceivers:		SP491 or compatible
Differential output:		2V min. with 50-ohm load (RS-422)
		1.5V min. with 27-ohm load (RS-485)
Output rise/fall time:		3ns min., 40ns max., 15ns typ.
Differential input
Threshold:		-0.2V min., +0.2V max.
Input resistance:		12k ohm min., 15k ohm typ.
Input current:		+/- 1.0mA max.
Power requirements
+5	volts:	approx. 320 mA
Temperature:		operating 0° to 70°
		storage -50°to 80°
Humidity:		10% to 90%

Quatech DSC-200/300 User's Manual 37