Serviceline Industrial Sensors
Serviceline Explosion Protection

SMART Transmitter Power Supply KCD2-STC-1.2O

  • 1-channel signal conditioner
  • 24 V DC supply (Power Rail)
  • Input for 2-wire SMART transmitters and current sources
  • Signal splitter (1 input and 2 outputs)
  • Dual output 0/4 mA ... 20 mA or 0/1 V ... 5 V
  • Terminal blocks with test sockets
  • Up to SIL 2 (SC 3) acc. to IEC/EN 61508

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  KCD2-STC-1.2O

General specifications
Signal typeAnalog input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Systematic capability (SC)SC 3
ConnectionPower Rail or terminals 9+, 10-
Rated voltage19 ... 30 V DC
Ripplewithin the supply tolerance
Power dissipationapprox. 1.4 W at 20 mA transfer current, 250 Ω in both outputs
Power consumption2 W
Connection sidefield side
Connectionterminals 1+, 2- (sink); 3+, 4- (source)
Input signal0/4 ... 20 mA
Voltage dropterminals 3, 4: ≤ 6.1 V at 20 mA
Short-circuit currentterminals 1+, 2-: 25 mA
Input resistanceterminals 1+, 2-: max. 500 Ω (BRAIN)
(250 Ω load)
Available voltageterminals 1+, 2-: ≥ 16 V at 20 mA , ≥ 18.5 V at 4 mA
Connection sidecontrol side
Connectionsource: terminals 5-, 6+; 7-, 8+
sink: terminals 5+, 6-, 7+, 8-
Loadchannel 1: 0 ... 500 Ω (20 mA)/> 1 MΩ (5 V)
channel 2: 0 ... 500 Ω (20 mA)/> 1 MΩ (5 V)
Output signal0/4 ... 20 mA or 0/1 ... 5 V
Ripplemax. 50 µA rms
Transfer characteristics
DeviationIout < 20 µA (0.1 %); Vout < 7.5 mV (0.15 %) incl. calibration, linearity, hysteresis and fluctuation of supply voltage, at 20 °C (68 °F), 0/4 ... 20 mA, 0/1 ... 5 V
Influence of ambient temperaturecurrent output: 0.25 µA/K
voltage output: 80 µV/K
Frequency rangefield 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 time6 ms
Rise time/fall time2 ms
Galvanic isolation
Input/Outputbasic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
Input/power supplybasic insulation according to IEC 61010-1, rated insulation voltage 300 Veff
Output/power supplyfunctional insulation, rated insulation voltage 50 V AC
Output/Outputfunctional insulation, rated insulation voltage 50 V AC
Display elementsLED
Control elementsDIP switch
Configurationvia DIP switches
Labelingspace for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2013 (industrial locations)
Electromagnetic compatibilityNE 21:2012
EN 61326-3-2:2008
Degree of protectionIEC 60529:2001
Protection against electrical shockUL 61010-1:2012
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
extended ambient temperature range up to 70 °C (158 °F), refer to manual for necessary mounting conditions
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 100 g
Dimensions12.5 x 124 x 114 mm (0.5 x 4.9 x 4.5 inch) (W x H x D) , housing type A2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
General information
NoteBoth output loads must be connected to ensure complete and correct operation within the technical specification.
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 11.027210119
ECLASS 10.0.127210119
ECLASS 9.027210119
ECLASS 8.027210119
ECLASS 5.127210119
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KCD2-STC-1.2O


This signal conditioner provides the galvanic isolation between field circuits and control circuits.

The device supplies 2-wire transmitters, and can also be used with current sources.

The device transfers the analog input signal to the control side as two isolated output signals.

Bi-directional communication is supported for SMART transmitters that use current modulation to transmit data and voltage modulation to receive data.

The output is selected as a current source, current sink, or voltage source via switches.

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

Product Documentation: KCD2-STC-1.2O

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF41 KB
Functional Safety ManualENGPDF1950 KB
System Manual ENGPDF3673 KB

Design / Simulation: KCD2-STC-1.2O

Language Selection:
CADLanguageFile TypeFile Size
3-D model / 3-D-ModellALLSTP3085 KB
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---
EPLAN macro P+F.KCD2-STC-1.2O.edz / EPLAN-Makro P+F.KCD2-STC-1.2O.edzALLEDZ1685 KB

Approvals: KCD2-STC-1.2O

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Worldwide exida Functional Safety AssessmentP+F 0905-035-R1-C R044 Assessment Report HiC2027 V1 R1ALLPDF831 KB

Associated Products: KCD2-STC-1.2O

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