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8B Isolated Analog Signal Conditioning Products

8B45

Frequency Input Modules

Description

8B modules are an optimal solution for monitoring real-world process signals

and providing high level signals to a data acquisition system. Each 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. Reference the block diagram below.

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 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.

Figure 1: 8B45 Block Diagram

▲

Features

 Accepts Frequency Input Signals 0 to 100kHz

 TTL or Zero-Crossing Signal Inputs

 High Level Voltage Outputs

 1500Vrms Isolation

 ANSI/IEEE C37.90.1 Transient Protection

 Input Protected up to 240VAC Continuous

 100dB CMR

 ±0.10% Accuracy

 ±0.05% Linearity

 Low Drift with Ambient Temperature

 UL Listing Pending

 Mix and Match Module Types on Backpanel

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For information call 800-444-764424SensorLex 8B Isolated Analog Signal Conditioning Products8B8B45Frequency Input ModulesDescription8B modules are an

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Impulse 8B45 Manual do Utilizador

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