Throughput Rate To Pc; Digital I/O - Measurement Computing USB-5200 Series User Manual

USB-5201 User's Guide

Throughput rate to PC

The analog inputs are configured to run continuously. Each channel is sampled twice per second. The maximum
latency between when a sample is acquired and the temperature data is provided by the USB unit is
approximately 0.5 seconds.
Maximum throughput to a CompactFlash® memory card is 1 S/s per channel.
Number of Maximum throughput
input channels
1 2 S/s
2 2 S/s on each channel, 4 S/s total
3 2 S/s on each channel, 6 S/s total
4 2 S/s on each channel, 8 S/s total
5 2 S/s on each channel, 10 S/s total
6 2 S/s on each channel, 12 S/s total
7 2 S/s on each channel, 14 S/s total
8 2 S/s on each channel, 16 S/s total

Digital I/O

All ground pins on the device (pins 9, 19, 28, 38) are isolated from earth ground. If a connection is made to
earth ground when using digital I/O and conductive thermocouples, the thermocouples are no longer isolated. In
this case, do not connect thermocouples to any conductive surfaces that may be referenced to earth ground.
Parameter
Digital type
Number of I/O
Configuration
Pull up/pull-down
configuration
Digital I/O transfer rate
(software paced)
Input high voltage
Input low voltage
Output low voltage
(IOL = 2.5 mA)
Output high voltage
(IOH = –2.5 mA)
Table 4. Throughput rate to PC specifications
Table 5. Digital input/output specifications
Specification
CMOS
8 (DIO0 through DIO7)
Independently configured for input or output.
Power on reset is input mode unless bit is configured for alarm.
All pins pulled up to +5 V through 47 kΩ resistors (default). Pull-down to ground also
available.
Digital input: 50 port reads or single bit reads per second typ

Digital output: 100 port writes or single bit writes per second typ

2.0 V min, 5.5 V absolute max
0.8 V max, –0.5 V absolute min
0.7 V max
3.8 V min
20
Specifications