BASIC INFO
P+F isolated barrier KFD2-STC4-Ex1.2O.H SMART Transmitter Power Supply 24 V DC supply
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
• Signal splitter (1 input and 2 outputs)
• Dual output 0/4 mA ... 20 mA
• Terminal blocks with test sockets
• High field voltage 17.6 V DC
• Up to SIL 3 acc. to IEC 61508
Function
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters
with higher output voltage in a hazardous area, and can also
be used with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as two
isolated current values.
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 Ohm between terminals 8, 9
and 11, 12 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
General specifications
Signal type Analog input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 3
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Ur 20 ... 35 V DC
Ripple within the supply tolerance
Power dissipation 1.9 W
Power consumption 2.5 W
Input
Connection side field side
Connection terminals 1+, 2-, 3 or 5-, 6+
Input signal 0/4 ... 20 mA
Open circuit voltage/short-circuit current terminals 1+, 3-: 24.2 V / 38 mA
Voltage drop terminals 5, 6 : ≤ 2.4 V at 20 mA
Input resistance terminals 2-, 3: ≤ 76 ohm
terminals 1+, 3: ≤ 500 ohm (250 ohm load)
Available voltage terminals 1+, 3: ≥ 17.6 V at 20 mA
Output
Connection side control side
Connection terminals 7-, 8+,9; 10-, 11+,12
Load 0 ... 550 ohm at 20 mA
Output signal 0/4 ... 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 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 20 µs
Galvanic isolation
Output/power supply functional insulation, rated insulation voltage 50 V AC
Output/Output 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 21:2011
Degree of protection IEC 60529:2001
Protection against electrical shock UL 61010-1:2012
Ambient conditions
Ambient temperature -20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protection IP20
Connection screw terminals
Mass approx. 200 g
Dimensions 20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) , housing type B2
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection
with hazardous areas
EU-Type Examination Certificate BAS 99 ATEX 7060 X
Marking ¬ II (1)G [Ex ia Ga] IIC , ¬ II (1)D [Ex ia Da] IIIC , ¬ I (M1) [Ex ia Ma] I
Input [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Supply
Maximum safe voltage Um 250 V (Attention! The rated voltage can be lower.)
Equipment terminals 1+, 3-
Voltage Uo 27.2 V
Current Io 93 mA
Power Po 632 mW
Order number:
KCD2-STC-Ex1
KCD2-STC-Ex1.ES
KFD2-CRG2-Ex1.D
KFD2-HLC-Ex1.D
KFD2-HLC-Ex1.D.2W
KFD2-STC4-Ex1
KFD2-STC4-Ex1.2O
KFD2-STC4-Ex1.2O.H
KFD2-STC4-Ex1.H
KFD2-STC4-Ex2
KFU8-CRG2-Ex1.D
KCD2-STC-Ex1.2O
KCD2-STC-Ex1.2O.ES
KCD2-STC-Ex1.ES.SP
KCD2-STC-Ex1.SP
KFD2-STC3-Ex1
KFD2-STC4-Ex1-Y1
KFD2-STC4-Ex1.2O-Y1
KFD2-STC4-Ex1.ES
KFD2-STC4-Ex2-Y1
KFD2-STC5-Ex1
KFD2-STC5-Ex1.2O
KFD2-STC5-Ex1.2O.H
KFD2-STC5-Ex1.H
KFD2-STC5-Ex2
KFD2-STC5-Ex2
KFD2-STC5-Ex2
KFD2-STV4-Ex1.2O-1
KFD2-STV4-Ex2-1
KFD2-STV4-Ex2-2
KFD2-STV5-Ex1-1
KCD2-STC-Ex1.2O.DE
KFD2-HLC-Ex1.D.4S
KFD2-STV4-Ex1.2O-2
KCD2-STC-Ex1.HC
KCD2-STC-Ex1.HC.SP
KFD2-STC4-Ex1
KFD2-STC4-Ex1-Y1
KFD2-STC4-Ex1.2O
KFD2-STC4-Ex1.2O-Y1
KFD2-STC4-Ex1.2O.H
KFD2-STC4-Ex1.H
KFD2-STV4-Ex1-1
KFD2-STV4-Ex1-2
KFD2-STV4-Ex1.2O-1
KFD2-STV4-Ex2-1
KFD2-STV4-Ex2-2
KFD2-STV4-Ex1.2O-2
KFD2-STC3-Ex1
KCD2-STC-Ex1-Y1
-----------------------------------
Lily
HONGKONG XIEYUAN TECH CO., LIMITED
T: 86-027-85581877 F: 86-027-85309780
Mail:lily@whxyauto.com
Ad: 7-A16,Caishen Commercial Plaza,Hankou Railway Station,Wuhan, Hubei, China
Web: www.hkxytech.com
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