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Instantly add the Model T670/T671 Frequency Input Two-Wire Transmitter and 50,000+ more product series to your store or catalog  
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Eurotherm Frequency Input Two-Wire Transmitter, T670/T671

Model T670/T671 Frequency Input Two-Wire Transmitter

Brand: Eurotherm
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The T671 isolating two-wire transmitter accepts frequency inputs with amplitudes from 100 mV-20 V RMS. 

Model T671 provides up to 200 V transformer-coupled isolation between input and output signal or common.

Model T670 provides a non-isolated output accepting input amplitudes from 25 mV to 75 VRMS. 

Both units feature 50% or greater span "turn-down" on all ranges. Standard output is 4-20 mA.
Features
  • Provides an output current signal in proportion to a frequency input
  • Wide ranging span adjustability (50%)
  • Direct magnetic pickup input
  • Protects equipment with 200 V input-to-output isolation (T671)
  • Improves EMI/RFI noise reduction with rugged metal housing
  • FM Safety approval for hazardous installations (T670)
  • CSA Certification available

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Specifications

Brand

Accuracy

  • ± 0.1 % of Span Typical

Approvals & Certifications

  • CSA
  • FM

Display

  • 3-1/2-Digit LCD

Electromagnetic Rating

  • RFI/EMI

Environmental Protection

  • Explosion-proof
  • IP66
  • NEMA 4X

Hysteresis

  • ± 0.1 % of Span Typical

Input

  • Adjustment Span Turn-Down: 0 to 10 kHz
  • Input Amplitude: 100 mV-20 V RMS - T671
  • Input Amplitude: 25 mV-75 V RMS - T670

Input Impedance

  • 200 mV: 10 kiloohms in Parallel with 500 PF

Isolation

  • T671: 200 Vdc or Peak AC

Linearity

  • ± 0.1 % of Span Typical
  • Best Straight Line Fit: ± 0.05 % of Span Typical

Load Effect

  • Change in Load Effect: 0.05 % of Span, Max.

Operating Temperature

  • -40° to 80° C (-40° to 176° F)

Output

  • Output Span (Option A): 10-50 mA
  • Output Span: 4-20 mA

Power Supply

  • 65 mA at 24/40 Vdc
  • Loop Power Supply: 600 mA at 24 Vdc

Power Supply Effect

  • Change in Supply-Voltage Effect: 0.05 % of Span, Max.

Repeatability

  • ± 0.1 % of Span Typical

Response Time

  • 15 Hz: 5 seconds
  • 240 Hz to 1 kHz: 250 milliseconds Typical
  • 30 Hz: 2 seconds
  • 60 to 120 Hz: 600 milliseconds Typical
  • Spans > =2.2 kHz: 100 milliseconds Typical

RFI/EMI Effect

  • RFI Effect (5 W, 470 MHz at 3 feet): < 1 % of Span Error

Span & Zero Adjustments

  • Span Turn-Down: 50 %
  • Zero Turn-Up: 10 %

Supply Voltage

  • 12-90 Vdc
  • Option A: 12-70 Vdc

Voltage Drop

  • Loop Voltage Drop: 12 Vdc at 20 mA

Documentation

Data Sheets

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