P+F KFD2-STC5-1.2O SMART Transmitter Power Supply 4-20mA SIL 2

This signal conditioner provides galvanic isolation between field circuits and control circuits. The device supplies 2-wire and 3-wire SMART transmitters, and can also be used with 2-wire SMART current sources.

It transfers the analog input signal to the control side as two isolated output signals. Digital signals may be superimposed on the input signal on the field side or on the control side and are transferred bi-directionally.

The device provides a sink mode or a source mode output on the control side terminals. The device has an internal resistor that can be used if the HART communication resistance in the control circuit is too low. Test sockets for the connection of HART communicators are integrated into the terminals.

• Signal type: Analog input
• Safety Integrity Level (SIL): SIL 2
• Systematic capability (SC): SC 3
• Connection: Power Rail or terminals 14+, 15-
• Rated voltage: 18 ... 30 V DC
• Power dissipation: ≤ 1 W at maximum load
• Power consumption: ≤ 1.7 W at maximum load

• Connection side: field side
• Connection: terminals 1+, 2-, 3
• Input signal: 4 ... 20 mA
• Open circuit voltage/short-circuit current: terminals 1+, 3: 23 V / 25 mA
• Input resistance: max. 265 Ω terminals 2-, 3, max. 330 Ω terminals 1+, 3
• Available voltage: ≥ 16 V at 20 mA; ≥ 20 V at 4 mA, terminals 1+, 3

• Connection side: control side
• Load: 0 ... 600 Ω
• Output signal: 4 ... 20 mA (overload > 25 mA)
• Ripple: max. 50 µA eff
• External supply (loop): 2 ... 30 V DC

• Deviation: ≤ ± 10 µA incl. calibration, linearity, hysteresis, loads and supply voltage fluctuations
• Influence of ambient temperature: ≤ 0.25 µA/K
• Frequency range: input in output: bandwidth with 1 mApp signal 0 ... 7.5 kHz (-3 dB)
• Settling time: 200 µs
• Rise time/fall time: 100 µs

• Input/Output: basic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
• Input/power supply: basic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
• Output/power supply: functional insulation, rated insulation voltage 50 V AC
• Output/Output: functional insulation, rated insulation voltage 50 V AC

• Ambient temperature: -20 ... 70 °C (-4 ... 158 °F)
• Degree of protection: IP20
• Connection: screw terminals
• Mass: approx. 150 g
• Dimensions: 20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) (W x H x D), housing type B2
• Mounting: on 35 mm DIN mounting rail acc. to EN 60715:2001

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