Zener Barrier Z779.H Assembly Features * * * * * * * 2-channel DC version, positive polarity Working voltage 26.5 V at 10 A Series resistance max. 250 Fuse rating 80 mA DIN rail mounting High power version Front view Terminals hazardous area 1 3 2 4 5 7 6 8 Function The Zener Barrier prevents the transfer of unacceptably high energy from the safe area into the hazardous area. Tag holder 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. Terminals safe area Shield and ground connection This high power version has a smaller serial resistance and therefore provides higher voltage to the field device. 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. Release date 2014-11-04 10:21 Date of issue 2015-02-16 071976_eng.xml Connection 1 + - 2 3 8 x3 7 x3 4 5 Zone 0, 1, 2 Div. 1, 2 Refer to "General Notes Relating to Pepperl+Fuchs Product Information". Pepperl+Fuchs Group USA: +1 330 486 0002 Germany: +49 621 776 2222 www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com 6 Zone 2 Div. 2 Singapore: +65 6779 9091 pa-info@sg.pepperl-fuchs.com 1 Technical data Z779.H General specifications Type DC version, positive polarity Electrical specifications Nominal resistance 240 Series resistance max. 250 Fuse rating 80 mA Hazardous area connection Connection terminals 1, 2; 3, 4 Safe area connection Connection terminals 5, 6; 7, 8 Working voltage max. 27 V , 26.5 V at 10 A Conformity Degree of protection IEC 60529 Ambient conditions Ambient temperature -20 ... 60 C (-4 ... 140 F) Storage temperature -25 ... 70 C (-13 ... 158 F) Relative humidity max. 75 % , without moisture condensation Mechanical specifications Degree of protection IP20 Connection self-opening connection terminals, max. core cross-section 2 x 2.5 mm2 Mass approx. 150 g Dimensions 12.5 x 115 x 110 mm (0.5 x 4.5 x 4.3 in) Construction type modular terminal housing , see system description Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001 Data for application in connection with Ex-areas EC-Type Examination Certificate BAS 01 ATEX 7005 , for additional certificates see www.pepperl-fuchs.com Group, category, type of protection Voltage Current Power Supply Maximum safe voltage Series resistance II (1)GD, I (M1) [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I (-20 C Tamb 60 C) [circuit(s) in zone 0/1/2] Uo 28 V Po 830 mW Um 250 V Io 120 mA min. 235 Permissible connection values [EEx ia] Statement of conformity Group, category, type of protection, temperature class TUV 99 ATEX 1484 X , observe statement of conformity II 3G Ex nA IIC T4 Gc [device in zone 2] Directive conformity Directive 94/9/EC EN 60079-0:2012, EN 60079-11:2012 , EN 60079-15:2010 International approvals FM approval Control drawing 116-0118 UL approval Control drawing 116-0139 Control drawing IECEx approval Approved for 116-0119 IECEx BAS 09.0142 [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I General information Supplementary information EC-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. Release date 2014-11-04 10:21 Date of issue 2015-02-16 071976_eng.xml CSA approval Refer to "General Notes Relating to Pepperl+Fuchs Product Information". Pepperl+Fuchs Group USA: +1 330 486 0002 Germany: +49 621 776 2222 www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com Singapore: +65 6779 9091 pa-info@sg.pepperl-fuchs.com 2