Starting from Nov 30th 2018, the PXTX-507 Series will be discontinued. As a possible substitute, please check out the TXUN Series.
This is a 2-wire, 4-20 mA Current Transmitter that accepts signals from 350, 500, 1K, 2.5K and 5K ohm bridges and provides the amplification and common-mode rejection necessary to control the current drawn from a 8 to 40 Vdc source to produce the 4-20 mA output signal. The transmitter is designed for 0.5 to 4.0 mV/V bridge sensitivities. The transmitter does not provide isolation between its input and the 4-20 mA output. It has two internal reference voltages for powering the bridge. The 1.24 volt reference is used with 1K ohm and lower resistance bridges. The 2.5 volt reference is used with 2.5K and 5K ohm bridges.
SPECIFICATIONS
Input Span: User selectable, 0.5 mV/V to 4 mV/V
Input Impedance: ±10 MΩ
Output Span: 4 to 20 mA
Min Output Current: 3.75 mA typical
Max Output Current: 22 mA typical
Supply Voltage Range: 8 to 40 Vdc
Transducer Excitation: Selectable, 350 to 500Ω 1.24 Vdc @ 3.54 mA, >500Ω 2.5 Vdc @ 3.5 mA; 5.0 mA max
Zero and Span Adjustability: 10% of any selected range
Accuracy: 0.5% of any adjusted span (includes linearity, hysteresis, stability)
Repeatability: 0.05% of span
Response Time: 200 ms typical
Stability:
Zero: Within 0.02% of span/°C or 5 µA, whichever is greater
Span: Within 0.01% of span/°C Max Lead-Wire Resistance Effect: Less than 0.25 µV per Ω Max Change-in-Supply Voltage
Effect: 0.05% of span over supply range
Output Ripple: Less than 0.05% of span, rms
Operating Temperature Range: -45 to 85°C (-49 to 185°F)
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