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Pepperl+Fuchs KFD2-STC4-EX1 – 283672

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Pepperl + Fuchs – KFD2-STC4-EX1 SMART TRANSMITTER POWER SUPPLY, 1-CHANNEL ISOLATED BARRIER, 24VDC, 0/4-20MA OUTPUT

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SKU: KFD2-STC4-EX1 Category: Tag: Brand:

Description

KFD2-STC4-Ex1
Features
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 0/4 mA … 20 mA
Terminals with test points
Up to SIL2 acc. to IEC 61508

Function
This isolated barrier is used for intrinsic safety applications. The device supplies 2-wire and 3-wire SMART transmitters in a hazardous area, and can also be used with 2-wire SMART current sources.Durable, this isolation barrier transfers the analog input signal to the safe area as an isolated current value.

Digital signals may be superimposed on the input signal in the hazardous or safe area and are transferred bi-directionally. If the HART communication resistance in the loop is too low, the internal resistance of 250 ? between terminals 8 and 9 can be used.

Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Application
The device supports the following SMART protocols:
HART
BRAIN
Foxboro

Specification

Technical Data
General specifications
Signal typeAnalog input
Supply
ConnectionPower Rail or terminals 14+, 15-
Rated voltage20 … 35 V DC
Ripplewithin the supply tolerance
Power loss1.5 W
Power consumption1.9 W
Input
Connectionterminals 1+, 2-, 3 or 5-, 6+
Input signal0/4 … 20 mA
Voltage drop Ud= 2.4 V at 20 mA (terminals 5, 6)
Input resistance= 64  ? terminals 2-, 3 ; = 500  ? terminals 1+, 3 (250  ? load)
Available voltage= 16 V at 20 mA terminals 1+, 3
Output
Connectionterminals 7-, 8+, 9
Load0 … 800  ?
Output signal0/4 … 20 mA (overload > 25 mA)
Ripple= 50  µA rms
Transfer characteristics
Deviation
  • at 20 °C (68 °F), 0/4 … 20 mA
  • = 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage
Influence of ambient temperature0.25 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)
Rise time20 µs
Start-up time200 µs
Electrical isolation
Output/power supplyfunctional insulation rated insulation voltage 50 V AC
Directive conformity
Electromagnetic compatibility 
Directive 2004/108/ECEN 61326-1:2006
Conformity
Electromagnetic compatibilityNE 21:2006
Protection degreeIEC 60529
Ambient conditions
Ambient temperature-20 … 60 °C (-4 … 140 °F)
Mechanical specifications
Protection degreeIP20
Massapprox. 200 g
Dimensions20 x 124 x 115 mm (0.8 x 4.9 x 4.5 in) , housing type B2
Data for application in connection with Ex-areas
EC-Type Examination CertificateBAS 99 ATEX 7060 , for additional certificates see www.pepperl-fuchs.com
Group, category, type of protectionEX II (1)GD [Ex ia] IIC [circuit(s) in zone 0/1/2]
InputEx ia IIC
Supply 
Maximum safe voltage Um250 V (Attention! The rated voltage can be lower.)
Equipmentterminals 1+, 3-
Voltage Uo25.4 V
Current Io86.8 mA
Power Po551 mW
Permissible connection values [EEx ia] 
Equipmentterminals 1+, 2 / 3-
Voltage Ui30 V
Current Ii115 mA
Voltage Uo25.4 V
Current Io115 mA
Power Po584 mW
Permissible connection values [EEx ia] 
Equipmentterminals 5-, 6+
Voltage Ui30 V
Current Ii115 mA
Voltage Uo8.7 V
Current Io0 mA
Output 
Maximum safe voltage Um250 V (Attention! The rated voltage can be lower.)
EC-Type Examination CertificateDMT 01 ATEX E 133
Group, category, type of protectionEX I (M1) [Ex ia] I
Statement of conformityTÜV 99 ATEX 1499 X , observe statement of conformity
Group, category, type of protection, temperature classEX II 3G Ex nA II T4 [device in zone 2]
Electrical isolation 
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Input/power supplysafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity 
Directive 94/9/ECEN 60079-0:2006, EN 60079-11:2007, EN 61241-11:2006 , EN 60079-15:2005 , EN 50303:2000
International approvals
UL approval 
Control drawing116-0173 (cULus)
General information
Supplementary informationEC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperlfuchs.com.

Datasheet

Additional information

Brand

Pepperl+Fuchs

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