Serviceline Industrial Sensors
Serviceline Explosion Protection

Zener Barrier Z787.H.F

Z787.H.F
  • 2-channel
  • DC version, positive polarity
  • Working voltage 26.5 V at 10 µA
  • Series resistance max. 273 Ω
  • Fuse rating 50 mA
  • DIN rail mountable
  • High power version
  • Replaceable back-up fuse
  • With diode return

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  Z787.H.F

General specifications
TypeDC version, positive polarity
Electrical specifications
Nominal resistance240 Ω
Series resistancemax. 273 Ω
Fuse rating50 mA
Hazardous area connection
Connectionterminals 1, 2; 3, 4
Safe area connection
Connectionterminals 5, 6; 7, 8
Working voltage
Supply loopmax. 27 V
Measurement loopmax. 26.5 V at 10 µA
Conformity
Degree of protectionIEC 60529
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Storage temperature-25 ... 70 °C (-13 ... 158 °F)
Relative humiditymax. 75 % , without condensation
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Core cross sectionmax. 2 x 2.5 mm2
Massapprox. 150 g
Dimensions12.5 x 115 x 116 mm (0.5 x 4.5 x 4.6 inch) (W x H x D)
Height115 mm
Width12.5 mm
Depth116 mm
Construction typemodular terminal housing , see system description
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificateBAS 00 ATEX 7096
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
Voltage28 V
Current120 mA
Power830 mW
Supply
Maximum safe voltage250 V
Series resistancemin. 235.2 Ω
CertificateTÜV 99 ATEX 1484 X
MarkingEx-Hexagon II 3G Ex nA IIC T4 Gc
Directive conformity
Directive 2014/34/EUEN IEC 60079-0:2018+AC:2020 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing116-0118
UL approvalE106378
Control drawing116-0355 (cULus)
IECEx approval
IECEx certificateIECEx BAS 18.0033
IECEx marking[Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.

Classifications

SystemClasscode
ECLASS 13.027211016
ECLASS 12.027211016
ECLASS 11.027211016
ECLASS 10.0.127219001
ECLASS 9.027219001
ECLASS 8.027219001
ECLASS 5.127210702
ETIM 9.0EC001485
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC002653
UNSPSC 12.139121018

Details: Z787.H.F

Function

The Zener Barrier prevents the transfer of unacceptably high energy from the safe area into the hazardous area.

The zener diodes in the Zener Barrier are connected in the reverse direction. The breakdown voltage of the diodes is not exceeded in normal operation. If this voltage is exceeded, due to a fault in the safe area, the diodes start to conduct, causing the fuse to blow. The Zener Barrier has a positive polarity, i. e. the anodes of the zener diodes are grounded.

Additionally this Zener Barrier is equipped with a replaceable fuse. This high power version has a smaller serial resistance and therefore provides higher voltage to the field device.

The Zener Barrier is for evaluation of signals from the hazardous area. The diodes of diode return prevent a current into the hazardous area, therefore the current assumption for intrinsic safety calculations is zero.

Depending on the application, increased or decreased intrinsic safety parameters apply for serial or parallel connection. For the detailed parameters refer to the Zener Barrier certificate. Application examples can be found in the system description of the Zener Barriers.

Product Documentation: Z787.H.F

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF234 KB
Functional Safety ManualENGPDF1972 KB
Manuals
System ManualENGPDF1203 KB

Design / Simulation: Z787.H.F

Language Selection:
CADLanguageFile TypeFile Size
CAD 3-D / CAD 3-DALLSTP951 KB
CAD Portal / CAD PortalALLLINK---
CAE
EPLAN macros Z-System devices (EMA) / EPLAN-Makros Geräte Z-System (EMA)ALLZIP2338 KB

Approvals: Z787.H.F

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Baseefa IECEx ia IECEx Certificate of ConformityIECEx BAS 18.0033ALLLINK---
Brasil TUV Rheinland BrazilTÜV 14.0362ALLPDF584 KB
China SITIIAS CCC Ex Certificate2020322316002774 (Bintan)ALLPDF2043 KB
DNV MarineTAA00001WXALLPDF114 KB
Europe Baseefa II (1) D II (1) G I (M1) ATEXBAS 00 ATEX 7096ALLPDF5273 KB
Europe TUV Nord II 3 G ATEX Category 3 GTÜV 99 ATEX 1484XALLPDF1460 KB
USA Canada UL Hazardous Location Certificate of Compliance cULus UL E106378CoC E106378 RepRef E106378-20131122ALLPDF476 KB
USA FMFM 17 US 0370ALLPDF416 KB
Worldwide Pepperl+Fuchs Functional Safety AssessmentCERT-5207ALLPDF575 KB
Control Drawings
Control drawing UL / Control drawing UL   ALLPDF92 KB
Control drawing FM / Control drawing FM   ALLPDF167 KB
Declaration of Conformity
EU Declaration of Conformity (P+F)TDOC-0061EENGENGPDF193 KB

Associated Products: Z787.H.F

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