Dataq DI-725/E, User Manual

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DI–720/DI–722/DI–730 Series User Manual
Accessories
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DI-8B45 Frequency Input Modules
Each DI-8B45 module isolates and conditions a frequency input signal and provides an analog voltage output.
The frequency input signal can be either a TTL level or zero crossing with as little as ±100mV amplitude. Input cir-
cuitry for each signal type has built-in hysteresis to prevent spurious noise from corrupting the module output. TTL
signals are applied to the + and - terminals while zero crossing signals are applied to the +EXC and - terminals. Ref-
erence the block diagram.
A 5V excitation is available for use with magnetic pick-up or contact closure type sensors. The excitation is available
on the -EXC terminal with return on the - terminal.
A special input circuit on the DI-8B45 modules provides protection against accidental connection of power-line volt-
ages up to 240VAC. Clamp circuits on the I/O and power terminals protect against harmful transients.
Isolation is provided by optical coupling to suppress transmission of common mode spikes or surges. The module is
powered from +5VDC, ±5%.
Ordering Information
MODEL INPUT RANGE OUTPUT RANGE EXCITATION
DI-8B45-01 0 to 500Hz 0 to +5V +5V at 8mA max
DI-8B45-02 0 to 1kHz 0 to +5V +5V at 8mA max
DI-8B45-03 0 to 2.5kHz 0 to +5V +5V at 8mA max
DI-8B45-04 0 to 5kHz 0 to +5V +5V at 8mA max
DI-8B45-05 0 to 10kHz 0 to +5V +5V at 8mA max
DI-8B45-06 0 to 25kHz 0 to +5V +5V at 8mA max
DI-8B45-07 0 to 50kHz 0 to +5V +5V at 8mA max
DI-8B45-08 0 to 100kHz 0 to +5V +5V at 8mA max