Product Highlights

• Accepts Frequency Input Signals 0 to 100kHz
• TTL or Zero-Crossing Signal Inputs
• High Level Voltage Outputs
• 1500Vrms Transformer Isolation
• ANSI/IEEE C37.90.1 Transient Protection
• Input Protected up to 240VAC Continuous
• 100dB CMR
• 70dB NMR at 60Hz
• ±0.05% Accuracy
• ±0.02% Linearity
• Low Drift with Ambient Temperature
• UL, CSA, FM and CE Certifications Pending
• Mix and Match Module Types on Backpanel

View the DI-8B Module Selection Guide

DI-8B modules are an optimal solution for monitoring real-world process signals and providing high level signals to a data acquisition system. 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 circuitry 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.

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 voltages 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%.

The modules are designed for installation in Class I, Division 2 hazardous locations and have a high level of immunity to environmental noise.

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Ordering Information, Models, and Prices

Part Number	Description	Price (US)	DATAQ Store
DI-8B45-01	0Hz to 500Hz input range.	$113	Quantity:
DI-8B45-02	0Hz to 1kHz input range.	$113	Quantity:
DI-8B45-03	0Hz to 2.5kHz input range.	$113	Quantity:
DI-8B45-04	0Hz to 5kHz input range.	$113	Quantity:
DI-8B45-05	0Hz to 10kHz input range.	$113	Quantity:
DI-8B45-06	0Hz to 25kHz input range.	$113	Quantity:
DI-8B45-07	0Hz to 50kHz input range.	$113	Quantity:
DI-8B45-08	0Hz to 100kHz input range.	$113	Quantity:
Accessories	Backplanes and Power Supplies.	N/A	Go to Accessories

Note: Pricing outside the U.S. will be higher to account for shipping, taxes, duty, currency fluctuation, local warranty and technical support in your country.
DI-8B Signal Conditioners have typical lead times of 2 weeks ARO.

Knowledge Base and Common Support Issues

The Importance of Isolation

Dimensions and Pinout

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