Description

KFD2-STC4-Ex1.2O is a Pepperl+Fuchs SMART transmitter power supply for analog signals with 0/4–20 mA input and output.

Input Details

• Connection Side: Field side

• Terminals: 1+, 2−, 3 or 5−, 6+

• Signal Range: 0/4 to 20 mA

• Open Circuit Voltage / Short-Circuit Current (1+, 3−): 22.7 V / 38 mA

• Voltage Drop (5, 6): ≤ 2.4 V at 20 mA

• Input Resistance:

• Terminals 2−, 3: max. 76 Ω

• Terminals 1+, 3: max. 500 Ω (with 250 Ω load)

• Available Voltage (1+, 3): ≥ 16 V at 20 mA

Output Details

• Connection Side: Control side

• Terminals: 7−, 8+, 9; 10−, 11+, 12

• Load Range: 0 to 550 Ω at 20 mA

• Output Signal: 0/4 to 20 mA (overload > 25 mA)

• Maximum Ripple: 50 µA rms

Performance

• Accuracy at 20 °C: ≤ 10 µA (includes calibration, linearity, hysteresis, and supply variations)

• Temperature Influence: 0.25 µA/K

• Frequency Response:

• Field to Control: 0 to 7.5 kHz (−3 dB at 0.5 Vpp)

• Control to Field: 0.3 to 7.5 kHz (−3 dB at 0.5 Vpp)

• Settling Time: 200 µs

• Rise and Fall Time: 20 µs

Isolation

• Output to Power Supply: Functional insulation, rated 50 V AC

• Output to Output: Functional insulation, rated 50 V AC