Measurement Computing DataShuttle - Manual (Page 67)

DataShuttle and DynaRes 11-12-01 Introduction to Terminal Panels 6-11
On T71 Terminal Panels Only
• Outputs are high voltage open collector with pull-up to +5V through LED:
Low Level: 40 mA max, < 0.7 volts at 30 mA (sink)
High Level: 30 volts max, < 300 µA (source);
can drive > 300µA at 2.5V
• · All inputs use Schmitt trigger to improve noise rejection.
General Conditions
Maximum Voltage – 150 volts on any terminal.
Maximum Current – 1 Amp on any terminal.
Auxiliary Power Supplies – The +12 V, +5 V, and -12 V supplies are generated by the computer power
supply. The Vref supply draws its current from the +12V supply.
Voltage Maximum Current
(One Board)
+5V 200 mA
+12V 200 mA
-12V 200 mA
Power, except for reference voltage, is supplied directly from the computer power supply. On the T71
terminal panel only, auxiliary supplies are protected by poly switches rated at one Amp. Switches
automatically reset so that nothing is burnt.
Operating Ambient Temperature – 0 to 60º C for the terminal panel, 5 to 90% RH, noncondensing.
Terminal Panel Power Supply Consumption
Voltage Supply Current Consumed by
T31 T71
+5V 50 mA 150 mA
+12V 0 mA 0 mA
-12V 0 mA 0 mA
-5V 0 mA 0 mA
The terminal panel consumes no current from the +5 volt supply if U1 and U2 are removed (except T71).