Pepperl+Fuchs KFD2-UT-Ex1-1 SMART Transmitter Power Supply, 1-channel, 24 V DC nominal supply voltage.

Technical data

Supply

Connection Power Rail or terminals 11+, 12-

Rated voltage 20 ... 35 V DC

Ripple within the supply tolerance

Power loss 1 W

Power consumption ≤ 1.5 W

Input

Connection terminals 1, 2, 3 and 4

suitable for Pt100, Ni100, thermocouples type B, E, J, K, L, N, R, S or T (IEC 584)

configuration via programming socket

Lead resistance ≤ 50 Ω per lead

Measuring current approx. 400 µA with resistance measuring sensor

current for lead breakage monitoring switched off during the measurement

Output

Voltage output 1 ... 5 V ; 5.125 V at input signal overrange

fault signal: downscale 0.5 ... 1 V or upscale 5.025 ... 5.125 V (programmable)

output resistance: ≤ 10 Ohm ; load: ≥ 10 kOhm

Connection terminals 7-, 8+

Current output 4 ... 20 mA ; 20.5 mA at input signal overrange ; fault signal: downscale 2 ... 4 mA or upscale 20.5 ... 22 mA

(programmable) ; load: ≤ 500 Ω

Safety maximum voltage Um 250 V

Transfer characteristics

Deviation

After calibration Pt100: ± 0.01 % of measurement value in K + 0.05 % of span + 0.1 K (4-wire connection)

thermocouple: ± 0.05 % of measurement value in °C + 0.05 % of span + 1 K

This includes ± 0.8 K error of the cold junction compensation

Influence of ambient temperature current output (deviation of CJC included):

Pt100: (± 0.0015 % of measurement value in K + 0.006 % of span)/K ∆TU*)

thermocouple: (± 0.02 K + 0.004 % of measurement value in °C + 0.006 % of span)/K ∆TU*)

voltage output (deviation of CJC included):

Pt100: (± 0.0015 % from measurement value in K + 0.0075 % of range)/K ∆TU*)

thermocouple: (± 0.02 K + 0.004 % from measurement value in °C + 0.0075 % of range)/K ∆TU*)*) ∆TU = ambient temperature change referenced to 23 °C (296 K)

Influence of supply voltage < 0.01 % of span

Influence of load ≤ 0.001 % of output value per 100 Ohm (current output)

Response time ≤ 430 ms

Electrical isolation

Input/Output safe electrical isolation acc. to EN 50020, voltage peak value 375 V

Input/power supply safe electrical isolation acc. to EN 50020, voltage peak value 375 V

Input/Programming input available

There is no electrical isolation between the programming input and the supply and output. The K-ADP1

interface (see section accessories and installation) provide electrical isolation so that ground loops are avoided.