Pepperl Fuchs SMART Transmitter Power Supply KFD2-STC5-Ex1

1-channel isolated barrier

24 V DC supply (Power Rail)

Input 2-wire and 3-wire SMART transmitters and 2-wire SMART current sources

Output 4 mA ... 20 mA current sink/current source

Terminals with test points

Up to SIL 2 acc. to IEC/EN 61508

General specifications

Signal type    Analog input

Functional safety related parameters

Safety Integrity Level (SIL)    SIL 2

Supply

Connection    Power Rail or terminals 14+, 15-

Rated voltage    18 ... 30 V DC

Ripple    within the supply tolerance

Power dissipation    ≤ 1 W at maximum load

Power consumption    ≤ 1.6 W at maximum load

Input

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

Output

Connection side    control side

Connection    terminals 7+, 8-, 9- (sink)

terminals 7-, 8+, 9+ (source)

see additional information

Load    0 ... 800 Ω

Output signal    4 ... 20 mA (overload > 25 mA)

Ripple    max. 50 µA rms

External supply (loop)    2 ... 30 V DC

If the external voltage is > 19 V, a load ≥ ((V - 19) / 0.02) Ω is required. V represents the value of the external voltage.

The internal 250 Ω resistor at terminal 9 can be used as a load.

Transfer characteristics

Deviation    at 20 °C (68 °F), 4 ... 20 mA

≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage

Influence of ambient temperature    ≤ 0.25 µA/K

Frequency range    field side into the control side: bandwidth with 0.5 Vpp signal 0 ... 7.5 kHz (-3 dB)

control side into the field side: bandwidth with 0.5 Vpp signal 0.3 ... 7.5 kHz (-3 dB)

Settling time    200 µs

Rise time/fall time    100 µs

Galvanic isolation

Output/power supply    functional insulation, rated insulation voltage 50 V AC

Indicators/settings

Display elements    LED

Labeling    space for labeling at the front

Directive conformity

Electromagnetic compatibility    

Directive 2014/30/EU    EN 61326-1:2013 (industrial locations)

Conformity

Electromagnetic compatibility    NE 21:2012

EN 61326-3-2:2008

Degree of protection    IEC 60529:2001

Protection against electrical shock    UL 61010-1:2012

Ambient conditions

Ambient temperature    -20 ... 70 °C (-4 ... 158 °F)

Mechanical specifications

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

Height    124 mm

Width    20 mm

Depth    115 mm

Mounting    on 35 mm DIN mounting rail acc. to EN 60715:2001

Data for application in connection with hazardous areas

EU-type examination certificate    CML 17 ATEX 2029X

Marking    Ex-Hexagon II (1)G [Ex ia Ga] IIC

Ex-Hexagon II (1)D [Ex ia Da] IIIC

Ex-Hexagon I (M1) [Ex ia Ma] I

Input    [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I

Supply    

Maximum safe voltage    250 V (Attention! The rated voltage can be lower.)

Equipment    terminals 1+, 3-

Voltage    26.2 V

Voltage    27.25 V

Current    93 mA

Power    634 mW

Equipment    terminals 2-, 3

Voltage    30 V

Current    115 mA

Power    max 1 W

Voltage    2 V

Current    8.5 mA

Power    4.3 mW

Equipment    terminals 1+, 2 / 3-

Voltage    26.2 V

Voltage    27.25 V

Current    115 mA

Power    784 mW

Certificate    CML 17 ATEX 3028X

Marking    Ex-Hexagon II 3G Ex ec IIC T4 Gc

Galvanic isolation    

Input/Output    safe electrical isolation acc. to IEC/EN 60079-11:2007, voltage peak value 375 V

Input/power supply    safe electrical isolation acc. to IEC/EN 60079-11:2007, voltage peak value 375 V

Directive conformity    

Directive 2014/34/EU    EN IEC 60079-0:2018 , EN 60079-7:2015+A1:2018 , EN 60079-11:2012

International approvals

UL approval    E106378

Control drawing    116-0439 (cULus)

IECEx approval    

IECEx certificate    IECEx CML 17.0015X

IECEx marking    [Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I , Ex ec IIC T4 Gc