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Switch Amplifier KHA6-SH-Ex1

  • 1-channel isolated barrier
  • 115/230 V AC supply
  • Input for approved dry contacts or SN/S1N sensors
  • Relay contact output
  • Fault indication output
  • Line fault detection (LFD)
  • Up to SIL 3 acc. to IEC/EN 61508
  • Up to PL d acc. to EN/ISO 13849
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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  KHA6-SH-Ex1

General specifications
Signal typeDigital Input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Performance level (PL)PL d
Connectionterminals 22, 23, 24
Rated voltage85 ... 253 V AC , 45 ... 65 Hz
Rated current30 mA ± 5 mA
Power dissipation2.2 W
Power consumptionmax. 2.3 W
Connection sidefield side
Connectionterminals 10+, 12-
Open circuit voltage/short-circuit currentapprox. 8.4 V DC / approx. 11.7 mA
Lead resistance≤ 50 Ω, in hazardous area cable capacitances and inductivities are to be taken into account
Switching point
Relay de-energizedI < 2.1 mA and I > 5.9 mA
Relay energized2.8 mA < I < 5.3 mA
Response delay≤ 1 ms
Connection sidecontrol side
Connectionoutput I: terminals 13, 14 ; output II: terminals 15, 21 ; output III: terminals 16+, 17-
Output Irelay , signal
Contact loading253 V AC/1 A/cos φ ≥ 0.7; 24 V DC/1 A resistive load
Mechanical life50 x 106 switching cycles
Output IIrelay , signal
Contact loading253 V AC/1 A/cos φ ≥ 0.7; 24 V DC/1 A resistive load
Mechanical life50 x 106 switching cycles
Output IIIelectronic output, passive , fault signal
Rated voltage10 ... 30 V DC
Signal level1-signal: (L+) -2.5 V (7 mA, short-circuit proof) / 0-signal: blocked output
(Leakage current ≤ 10 µA)
Transfer characteristics
Switching frequency5 Hz
Display elementsLEDs
Labelingspace for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2013 (industrial locations)
Low voltage
Directive 2014/35/EUEN 61010-1:2010+A1:2019+A1:2019/AC:2019
Machinery Directive
Directive 2006/42/ECEN/ISO 13849-1:2015
Electromagnetic compatibilityNE 21:2017 , EN 61326-3-1:2017
Degree of protectionIEC 60529:2001
SafetyIEC/EN 61508:2010
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 280 g
Dimensions40 x 93 x 115 mm (1.6 x 3.7 x 4.5 inch) (W x H x D) , housing type E
Height107 mm
Width40 mm
Depth115 mm
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificatePTB 00 ATEX 2043
MarkingEx-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
InputEx ia
Voltage9.56 V
Current16.8 mA
Power41 mW (linear characteristic)
Maximum safe voltage253 V AC/DC (Attention! The rated voltage can be lower.)
Contact loading253 V AC/1 A/cos φ ≥ 0.7; 24 V DC/1 A resistive load
Maximum safe voltageoutput I/output II: 253 V AC/DC (Attention! Um is no rated voltage.)
Galvanic 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 2014/34/EUEN IEC 60079-0:2018+AC:2020 , EN 60079-11:2012
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 13.027210121
ECLASS 12.027210121
ECLASS 11.027210121
ECLASS 10.0.127210121
ECLASS 9.027210121
ECLASS 8.027210121
ECLASS 5.127210121
ETIM 9.0EC001485
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KHA6-SH-Ex1


This isolated barrier is used for intrinsic safety applications.

The device transfers digital signals (SN/S1N proximity sensors or approved dry contacts) from a hazardous area to a safe area.

The input controls 1 relay contact output with 3 NO contacts (1 output is in series to the both output relays for the safety function), 1 relay contact output with 1 NO contact, and 1 passive transistor output (fault indication output).

Unlike an SN/S1N series proximity sensor, a mechanical contact requires a 10 kΩ resistor to be placed across the contact in addition to a 1.5 kΩ resistor in series.

Lead breakage (LB) and short circuit (SC) conditions of the control circuit are continuously monitored.

During an fault condition, the fault indication output energizes and outputs I and II de-energize.

For safety applications up to SIL 3, output I must be used. For safety applications up to SIL 2, output I and output II can be used.

Informative Literature: KHA6-SH-Ex1

Language Selection:
LiteratureLanguageFile TypeFile Size
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Product Documentation: KHA6-SH-Ex1

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF161 KB
Functional Safety ManualENGPDF1965 KB
ManualENGPDF3685 KB

Design / Simulation: KHA6-SH-Ex1

Language Selection:
CAELanguageFile TypeFile Size
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---

Approvals: KHA6-SH-Ex1

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Europe PTB ATEX Category (1) D ATEX Category (M1) ATEX Category (1) GPTB 00 ATEX 2043ALLPDF511 KB
Japan TIISTC16041ALLPDF1544 KB
Worldwide TÜV SÜD Functional Safety AssessmentPM85769TALLPDF797 KB
Declaration of Conformity
EU Declaration of Conformity (P+F)TDOC-0592CENGENGPDF183 KB

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