Measurement Computing LogBook Series - Manual (Page 26)

1-16 An Introduction to LogBook 969591 LogBook User’s Manual
Sequencer
Randomly programmable for channel and gain and for
unipolar/bipolar (where applicable)
Depth: 1024 analog channels plus 128 digital
channels
Channel to Channel Rate: 10 µs/channel, fixed
Maximum Rep Rate: 100 kHz
Minimum Rep Rate: 10 hours
Expansion Channel Sample Rate: Same as on-board
channels, 10 µs/channel
General Purpose Digital I/O
24 I/O channels, expandable up to 192
Connector: DB37 male, P2
Device: 82C55
Maximum Input and Update Rate: 100 kHz
Output Voltage Levels:
Minimum “1" Voltage: 3.0 @ 2.5 mA sourcing
Maximum ”0" Voltage: 0.4 @ 2.5 mA sinking
Output Current:
Maximum Source Current: 2.5 mA
Maximum Sink Current: -2.5 mA
Input Voltage Levels:
Minimum Required “1" Voltage Level: 2.0 V
Maximum Allowed ”0" Voltage Level: 0.8 V
Output Float Leakage Current: 10 µA
High-Speed Digital I/O
Channels: 16 input lines
Connector: DB37 male, P3
Maximum Sampling Rate: 100K words/s Input Low Voltage: 0.8 V max
Input High Voltage: 2.0 V min
Input Low Current: 10 µA
Input High Current: -10 µA
Frequency/Pulse Counter
Channels: 4, 16 bits per channel, cascadeable
Connector: DBK37 male, P3
Maximum Pulse Count: 32-bit binary (2 channels
cascaded)
Maximum Input Rate: 1 MHz
Input Voltage: -15 to +15 V
Threshold Voltage (Low): 0.8 V typical, 0.5 V min
Threshold Voltage (High): 1.6 V typical, 2.1 V max
Hysteresis: 400 mV min
Pulse Width (High or Low): 520 ns min
Input Impedance: 27 K pull-up to +5 V in
parallel with 50 pF
Frequency/Pulse Generator
Channels: 2, 16 bits per channel
Connector: DB37 male, P3
Frequency/Pulse Generating Mode: Input frequency
divided by
1 to 65,535
Input Low Voltage: 0.8 V max
Input High Voltage: 2.0 V min
Input Low Current: -10.0 µA max
Input High Current: 10.0 µA max
Output High Voltage: 2.4 V min @ -8 mA
Output Low Voltage: 0.5V max @ 8 mA