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Model T670/T671 Frequency Input Two-Wire Transmitter
Brand: EurothermThe 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
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
