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: > or = to 10 Mohm
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, 1.24 Vdc or 2.5 Vdc
Zero & Span Adjustability: 10% of any selected range
Accuracy: (includes linearity, hysteresis, stability) 0.5% of any adjusted span
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. Leadwire Resistance Effect: Less than 0.25 µV per ohm
Maximum 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)