Zener barriers - Operating instructions How to select the correct barrier 7. The following points have to be clarified if special field devices are used. • If the field device is a 4-20 mA transmitter: What load in Ohms can be connected to the transmitter so that it can attain 20 mA as before? • If the field device is a current / pressure converter: What load can be connected to the controller card so that it can attain 20 mA as before? • If the field device is a transmitter: How high is the load in the safe area? (Typically, resistances of up to 250 Ohm are used in the controller.). NEW: In the near future, a barrier will be available with a replaceable back-up fuse. The introduction of a replaceable back-up fuse ahead of the integrated fuse provides protection against faults which could occur during the commissioning of the system. It is always arranged that the outer fuse will respond before the inner, innaccessible fuse. The fuses used are specially intended for use on barriers. Z... Type Channels Max. Series resistance Uin at 10 µA Uin max Fuse rating External fuse Fuse supplied by LITTLEFUSE Ohm V V mA mA Z715.F 1 106 13 13.6 100 63 Z728.F 1 327 27 28 80 50 217,05 Z728.H.F 1 250 27 28 80 50 217,05 Z765.F 2 106 106 13 13 13.6 13.6 100 100 63 63 217,063 Z779.F 2 327 327 27 27 28 28 80 80 50 50 217,05 Z779.H.F 2 250 250 27 27 28 28 80 80 50 50 217,05 Z787.F 2 327 36 + 0.9V 27 27 28 28 80 80 50 50 217,05 Z787.H.F 2 250 25+ 0.9V 27 27 28 28 80 80 50 50 217,05 Z960.F 2 64 64 6.5 6.5 9.5 9.5 80 80 50 50 217.05 Z961.F 2 106 106 6.5 6.5 8.1 8.1 160 160 100 100 217.1 Z966.F 2 166 166 10 10 11.7 11.7 100 100 63 63 217.063 Issue date 19.9.00 217,063 Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com 447 Zener barriers - Operating instructions How to select the correct barrier See circuit diagram No. Nominal data + ve - ve a.c. V Ω Z705 Z805 – 5 10 1), 2) – – Z905 5 10 3) Z710 Z810 – 10 50 1), 2) – – Z910 10 50 3) Z710.CL Z810.CL – 10 50 1), 2) Z715 Z815 – 15 100 1), 2) – – Z915 15 100 3) Z715.CL Z815.CL – 15 100 1), 2) Z715.1K Z815.1K – 15 1k 3) – – Z915.1K 15 1k 1), 2) Z722 Z822 – 22 150 1), 2) Z722.CL Z822.CL – 22 150 1), 2) Z728 Z828 – 28 300 1), 2) Z728.CL Z828.CL – 28 300 1), 2) – – Z928 28 300 3) Z755 Z855 – 5 10 4), 5) Circuit diagram Hazardous area connections 1) 1 – Z955 5 10 2 2) 1 – – – Z961 7 10 7 10 9 100 x3 2 3) 9 100 1 8 x3 2 4), 5) – Z961.H 9 360 9 360 1 4 8 x3 x3 Z864 – 12 1k 12 1k – Z964 12 1k 12 1k 1 8 x3 – Z865 – – Z966 15 100 15 100 12 150 12 150 3 4), 5) x3 6) 1 x3 x3 Z872 Z966.H 12 75 12 75 – 22 150 22 150 8 7 6) 3 4), 5) x3 x3 AC Type 6) 4), 5) 5 7) 1 6) 6 8 x3 2 4 x3 AC Type 7 6 5 All diodes are turned 180 ˚ for the -VE- version. Issue date Z772 – 6 5 -VE Type 3 – 7 6) 4 Z765 6 5 +VE Type 2 – 7 5) 4 Z764 7 AC Type 2 – 7 -VE Type x3 6) 6) 8 CL 3 Z857 7 +VE Type 2 Z757 8 CL x3 4) – Safe area connections 19.9.00 Type Subject to reasonable modifications due to technical advances. 448 Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com Zener barriers - Operating instructions How to select the correct barrier Issue date 19.9.00 see Note 2 Ex-characteristics for [EEx ia] IIC Uin Uin bei 10 µA max Ω V V mA Max. end-toend resistance Fuse rating Uz (V) Rmin (Ω) IK(mA) 4.94 9.8 504 0.62 1800 0.15 60 18.18 0.9 (1 µA) 4.8 250 4.98 9.8 499 0.61 1800 0.15 60 18.18 0.9 (1 µA) 4.7 250 9.56 49 195 0.47 3 0.95 75 55 6.5 8.9 100 9.94 49 203 0.50 3 0.95 75 55 6.5 9.3 100 9.56 49 195 0.47 3 0.95 75 62 +2V 6.5 8.9 100 14.7 98 150 0.55 0.75 1.5 65 106 13.0 13.6 100 15.0 98 153 0.57 0.75 1.5 65 106 13.0 14.0 100 14.7 98 150 0.55 0.75 1.5 65 113 +2V 13.0 13.6 100 14.7 980 15 0.06 0.75 150 590 1024 13.0 13.6 100 15 980 15 0.06 0.75 150 590 1024 13.0 14.0 100 22 147 150 0.83 0.26 1.5 43 166 19.0 20.1 50 22 147 150 0.83 0.26 1.5 43 181 +2V 19.0 20.1 50 28 301 93 0.65 0.13 4.2 55 327 27.0 28.0 50 28 301 93 0.65 0.13 4.2 55 342 +2V 27.0 28.0 50 28 301 93 0.65 0.13 4.2 55 327 26.0 27.6 50 A1 4.94 9.8 504 0.62 1800 0.15 60 18.18 0.9 (1µA) 4.8 250 A2 4.94 9.8 504 0.62 1800 0.15 60 18.18 0.9 (1µA) 4.8 250 Pmax(W) Cmax (µF) Lmax (mH) L/R Ratio B 4.94 4.9 1008 1.24 1800 0.037 23 – – – – A1 4.89 9.8 499 0.61 1800 0.15 60 18.18 0.9 (1µA) 4.7 250 A2 4.89 9.8 499 0.61 1800 0.15 60 18.18 0.9 (1µA) 4.7 250 B 4.89 4.9 998 1.22 1800 0.037 23 – – – – C 9.78 19.6 499 1.22 3 0.15 30 – – – – A1 7.2 9.8 729 1.3 14 0.7 29 15.5 6.0 6.9 200 A2 7.2 9.8 729 1.3 14 0.7 29 15.5 6.0 6.9 200 B 7.2 4.9 1458 2.6 14 0.17 11 – – – – A1 8.7 98 89 0.19 5 4.5 173 106 6.5 8.1 100 A2 8.7 98 89 0.19 5 4.5 173 106 6.5 8.1 100 B 8.7 49 178 0.39 5 1.2 68 – – – – C 17.4 196 89 0.39 0.5 4.5 86 – – – – A1 8.7 352.8 25 0.05 5 54.5 589 380 6.5 8.1 50 A2 8.7 352.8 25 0.05 5 54.5 589 380 6.5 8.1 50 B 17.35 176.4 50 0.1 0.46 14.35 238 – – – – A1 11.6 980 12 0.03 1.6 230 910 1033 10.0 11.0 50 A2 11.6 98 12 0.03 1.6 230 910 1033 10.0 11.0 50 B 11.6 490 24 0.06 1.6 60 350 – – – – A1 12 980 12 0.04 1.6 230 910 1033 10.0 11.7 50 A2 12 980 12 0.04 1.6 230 910 1033 10.0 11.7 50 B 12 490 24 0.08 1.6 60 350 – – – – C 24 1960 12 0.08 0.2 230 460 – – – – A1 14.7 98 150 0.55 0.75 1.5 65 106 13.0 13.6 100 A2 14.7 98 150 0.55 0.75 1.5 65 106 13.0 13.6 100 B 14.7 49 300 1.1 0.75 0.35 23 – – – – A1 12 147 82 0.24 1.6 5.2 143 166 10.0 11.7 50 A2 12 147 82 0.24 1.6 5.2 143 166 10.0 11.7 50 – B 12 73.5 164 0.48 1.6 1. 53 – – – C 24 294 82 0.48 0.2 5.2 71 – – – – A1 12 73.5 163 0.49 1.5 1.34 72 82 10.0 11.7 100 A2 12 73.5 163 0.49 1.5 1.34 72 82 10.0 11.7 100 B 24 36.5 327 0.98 0.18 0.312 30 – – – – A1 22 147 150 0.83 0.26 1.5 43 166 19.0 20.1 50 A2 22 147 150 0.83 0.26 1.5 43 166 19.0 20.1 50 B 22 73.5 300 1.66 – – – – Subject to reasonable modifications due to technical advances. no approval for IIC Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com 449 Zener barriers - Operating instructions How to select the correct barrier Circuit diagram Type Nominal data + ve - ve a.c. V Ω See circuit diagram No. Z778 Z878 – 28 600 4), 5) 28 600 Hazardous area connections 8) 1 8 x3 2 Z779 Z879 Z779.H Z796 – Z879.H Z896 – 28 300 28 300 28 240 28 240 26.6 320 20.5 415 Safe area connections 7 4), 5) 3 x3 4 4), 5) 6 5 All diodes are turned 180 ˚ for the -VE- version. 4), 5) 9) Z788 Z888 + Z788.H – 28 300 + 10 50 Z888.H 28 240 10 50 1 4), 5) 8 x3 2 7 4), 5) 3 x3 4 Z788.R Z888.R 28 240 7) Z788.R.H Z888.R.H 10 50 4), 5) 6 5 All diodes are turned 180 ˚ for the -VE- version. Z786 Z886 Z787 Z887 – 28 Diode 28 Diode 28 300 28 Diode 8) 10) 9) 1 8 2 7 3 Z787.H – – – – – – – – – Z960 Z965 Z967 Z972 Z978 28 240 28 Diode 10 50 10 50 15 100 15 100 17 120 17 120 22 300 22 300 28 620 28 620 9) 10) 10) 6 4 5 1 8 2 7 3 6 4 5 11) 10) 10) 10) Issue date 19.9.00 – Z887.H x3 Subject to reasonable modifications due to technical advances. 450 Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com Zener barriers - Operating instructions How to select the correct barrier Issue date 19.9.00 see Note 2 Ex-characteristics for [EEx ia] IIC Uin Uin at 10 µA max Ω V V mA Max. end-toend resistance Fuse rating Uz (V) Rmin (Ω) IK(mA) A1 28 607 46 0.32 0.13 16 103 646 27.0 28.0 50 A2 28 607 46 0.32 0.13 16 103 646 27.0 28.0 50 B 28 303.5 92 0.65 0.13 4.2 40 – – – – A1 28 301 93 0.65 0.13 4.2 55 327 27.0 28.0 50 A2 28 301 93 0.65 0.13 4.2 55 327 27.0 28.0 50 B 28 150.5 186 1.3 – – – – A1 28 235 119 0.83 0.13 2.55 42 250 27.0 28.0 80 A2 28 235 119 0.83 0.13 2.55 42 250 27.0 28.0 80 B – – – – – – – – A1 26.6 314 85 0.57 0.15 5 60 340 24.0 25.1 50 A2 20.5 407 50 0.26 0.3 14 132 437 18.0 19.5 50 B 23.9 177.25 135 0.81 0.15 1.9 34 – – – – A1 28 301 93 0.65 0.13 4.2 55 327 27.0 28.0 50 A2 9.56 49 195 0.47 3.0 0.95 75 64 6.5 9.1 50 A1 28 235 119 0.83 0.13 2.55 42 250 27.0 28.0 80 A2 9.56 49 195 0.47 3 0.95 75 64 6.5 9.1 80 B 28 40.54 314 1 0.13 0.27 27.7 – – – – Pmax(W) Cmax (µF) Lmax (mH) L/R Ratio no approval for IIC no approval for IIC B 12.14 42.14 288 0.87 0.13 0.36 25 – – – – A1 28 235 119 0.83 0.13 2.55 42 250 27.0 28.0 80 A2 9.56 49 195 0.47 3 0.95 75 64 – 9.1 80 B 28 40.54 314 1 0.13 0.27 27.7 – – – – A1 28 – – 0.13 – – 36 + 0.9 V 27.0 28.0 50 A2 28 – – 0.13 – – 36 + 0.9 V 27.0 28.0 50 B 28 – – 0.13 – – – – – – A1 28 301 0.65 0.13 4.2 55 327 27.0 28.0 50 A2 28 – – 0.13 – – 36 + 0.9 V 27.0 28.0 50 93 B 28 301 93 0.65 0.13 4.2 55 – – – – A1 28 235 119 0.83 0.13 2.55 42 250 27.0 28.0 80 A2 28 – – – 0.13 25+ 0.9 V 27.0 28.0 80 B 28 235 119 0.83 0.13 2.55 42 – – – – A1 9.94 49 203 0.50 3 0.95 75 64 6.5 9.5 50 A2 9.94 49 203 0.50 3 0.95 75 64 6.5 9.5 50 B 9.94 24.5 406 1.08 3 0.2 27 – – – – see Note 1 C 9.94 98 102 0.25 3 3.5 143 – – – – A1 15 98 153 0.57 0.75 1.5 65 115 13.0 14.2 50 A2 15 98 153 0.57 0.75 1.5 65 115 13.0 14.2 50 B 15 49 306 1.15 0.75 0.3 20 – – – – C 15 196 77 0.29 0.75 6.0 117 – – – – A1 16.8 117 143 0.60 0.56 1.6 47 136 15.0 16.2 50 A2 16.8 117 143 0.60 0.56 1.6 47 136 150 16.2 50 B 16.8 59 286 1.20 0.56 0.26 21 – – – – C 16.8 235 71 0.30 0.56 6.8 114 – – – – A1 22 301 73 0.40 0.26 6.6 83 327 19.0 20.9 50 A2 22 301 73 0.40 0.26 6.6 83 327 19.0 20.9 50 B 22 150 146 0.80 0.26 1.5 33 – – – – C 22 602 37 0.20 0.26 23 166 – – – – A1 28 607 46 0,32 0.13 16 105 646 26.0 27.6 50 A2 28 607 46 0,32 0.13 16 105 646 26.0 27.6 50 B 28 304 92 0.64 0.13 4.2 39 – – – – C 28 1215 23 0.16 0.13 64 205 – – – – Subject to reasonable modifications due to technical advances. Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com 451 Zener barriers - Operating instructions How to select the correct barrier Circuit diagram Type Nominal data + ve - ve a.c. – – Z954 Ω V See circuit diagram No. Hazardous area connections Safe area connections 11) Dummy 799 see Note 2 Ex-characteristics for [EEx ia] IIC 1 8 2 7 3 6 4 5 Max. end-toend resistance Uin Uin at 10 µA max Fuse rating Uz (V) Rmin (Ω) IK(mA) Ω V V mA A1 4.5 11.76 383 0.43 3000 0.25 85 27.27 0.9 (1 µA) 4.9 50 A2 4.5 11.76 383 0.43 3000 0.25 85 27.27 0.9 (1 µA) 4.9 50 A3 4.5 11.76 383 0.43 3000 0.25 85 27.27 0.9 (1 µA) 4.9 50 B 9.0 3.92 1148 1.29 3.2 0.028 19 C 9.0 17.64 510 1.15 3.2 0.12 24 Pmax(W) Cmax (µF) Lmax (mH) L/R Ratio Note: Zener barriers type Z787H and Z887H have channels with diode returns. The Ex terminals for the channels with diode returns should be regarded as 28 V voltage sources. The 28 V must be considered as the theoretical maximum up to which a capacitive load can be applied to the Ex terminals due to the leakage current of the diode return. This voltage is only used in calculating the load capacitance. Issue date 19.9.00 Remark: A1, A2 and A3 are separate channels. B: Two channels in parallel circuit with a ground connection. C: Two channels in series circuit without a ground return. Subject to reasonable modifications due to technical advances. 452 Copyright Pepperl+Fuchs, Printed in Germany Pepperl+Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com