mV, THC or RTD input
The SB3075 converts a low-level dc signal from a temperature sensor mounted in the field into two 4/20mA current signals for driving a control-station load. Software-selectable features include configuration, ranging, monitoring and testing for eight thermocouple types, or two kinds of 3-wire RTDs. Each thermocouple model converter has an integral sensor for the purpose of cold-junction compensation. Configuration is carried out through a port inside of the module using and a personal computer. The SB3075 provides dual outputs.

Dimension
114.5mm×99.0mm×17.5mm
 Number of channels
1, with dual outputs
 Signal source
Millivolt Types J, K, T, E, R, S, B or N THCs to IEC584 3-wire Pt100 or Cu50 RTDs to BS1904/DIN 43760
 Input signal range
-75 to +75mV, or 0 to 450Ω
 Input signal span
3 to 150mV, or 10 to 450Ω
 Cold junction compensation
Automatic Error: ±1.0℃
 Common mode rejection
120dB for 250V at 50Hz/60Hz
 Series mode rejection
40dB for 50/60Hz
 Calibration accuracy (at 20℃)
(Includes hysteresis, non-linearity and repeatability) Inputs: mV/THC: ±15μV or±0.05% of input value (whichever is greater) RTD: ±80mΩ Output: ±11μA

Temperature drifts (typical)
Inputs: mV/THC: ±0.003% of input value/℃ RTD: ±7mΩ/℃ Output: ±1.0μA/℃
 Output range
4 to 20mA or 1 to 5V Note: Clear indication should be given in ordering code when 1 to 5V is needed.  Control-station side circuit load resistance
0 to 550Ω for each output channel
 LED indicators
One provided for power indication
 Power supply
Voltage: (20~35)VDC Current: (with 20mA signal) 80mA at 20V 70mA at 24V 52mA at 35V Power: 1.68W typical at 24V with 20mA signal
 Isolation
250V AC/DC between control station and filed circuits