Measurement Computing DBK Part 2 - Manual (Page 122)

DBK55, pg. 12 988793 DBK Option Cards and Modules
Specifications - DBK55
Name/Function: 8-Channel Frequency-to-Voltage Input Card
Input Channels per Module: 8
Maximum Modules per System: 32
Maximum Channels per System: 256
Input Connector: 1 BNC connector per channel
Connector: DB37 male, mates with P1
Frequency Ranges: (programmable) 0 Hz to 960 kHz
Output Voltage Range: -5 V to +5 V
Debounce Delays: (software selectable) 0, 0.6, 2.5, 10 ms
Measurement Rate: up to 500 per second per channel, 1000 per second total
Accuracy: 0.1%
Power Required: 840 mW
Analog Input
Low-level:
50 mV typical (100 mV max) p-p sine wave @ 10 Hz to 100 kHz
Any edge of 50 (100 max) mV amplitude and 5 V/s rate.
Input impedance: AC-coupled (0.33 µF), in series w/ 20 KΩ to ground.
15 mV hysteresis.
High-level:
0.75 V typical (1.25 V max) p-p sine wave @ 10 Hz to 100 kHz
Any edge of 0.75 V (1.25 V max) amplitude and 50 V/s rate.
Input impedance: AC-coupled (0.33 µF), in series w/ 20 KΩ to ground.
250 mV hysteresis.
Maximum Input Voltage: 30 Vrms (84 Vp-p)
Low-Pass Filters: (hardware selectable) 30 Hz, 300 Hz, 100 kHz, single pole
Digital Input
TTL-Level: 0.001 to 960 kHz.
Input Impedance: 27 KΩ pull-up to +5 V || 50 pF
V Low (“0”): 0.8 V typ, 0.5 V min
V High (“1”): 1.6 V typ, 2.1 V max
Hysteresis: 400 mV min
Pulse Width (high or low): 520 nsec min.
Maximum Input Voltage: -15 V to +15 V