Measurement Computing DataShuttle - Manual (Page 34)

2-16 DataShuttle - Technical Notes 11-13-01 DataShuttle and DynaRes
Analog Input
Scan Rate – Scan rate is the rate in Hertz (or, samples per second) to read data into memory, including the
time it takes to switch channels and ranges. To calculate the total scan time for all channels, divide the rate
by the number of channels.
For the Analog Input Terminals on the DataShuttle
• Maximum voltage on any terminal: 150 volts.
• Maximum voltage on DS-5B models: 1500 volts.
• Maximum current on any terminal: 1 Amp.
Digital Input/Output
For the Digital Input/Output Termination on the DataShuttle
• Each line is individually selected to be an input or output.
• Inputs are TTL and MOS compatible
• Outputs are high voltage open collector:
• Low Level: 50 mA max, < 0.7 volts at 40 mA (sink)
• High Level: 30 volts max, <250 µA (source)
• TTL outputs are available at the input terminals when an I/O is set to an output:
Low Level: < 0.4 volts at 2 mA (sink)
High Level: > 2.4 volts at 100 µA (source)
• Maximum voltage on any terminal with digital isolation modules installed: up to 300 VAC, depending
on module.
Counter/Timer
The DataShuttle has one on-unit 16-bit counter/timer with 2 MHz internal clock. It can count pulses as fast
as 3 MHz.
• Low Level: <0.4 volts at 2mA (sink)
• High Level: >2.4 volts at 100 µA (source)
Analog Output
For the analog output terminals on the DataShuttle-AO –
• Voltage compliance: will drive up to 1K load positive or negative
• Current compliance: 3 to 30V, sinking current only
• Maximum output speed: 2KHz (preliminary)
DataShuttle-AO Resolution And Accuracy
Output
Range
Nominal Resolution Accuracy
0 to 10V 2.4mV ±10mV
0 to 5V 1.2mV ±5mV
0 to 2V 0.48mV ±3mV
±5V 2.4mV ±10mV
±2.5V 1.2mV ±5mV
±1V 0.48mV ±3mV
4 to 20mA 3.9µA ±50µA