Rockwell-automation T80004 Application Note Field Loop Configuration Manual de usuario Pagina 1

TrustedTM AN-T80004 Issue 10 Jun 13 AN-T80004 1 Application Note Field Loop Configuration The TrustedTM Input/Output (I/O) modules ar

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 10 T8433 Termination Options The T8433 TrustedTM Isolated Analogue Input mo

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 11 The T8834 FTA is a configurable version of the T8433. This also connects

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 12 For field powered devices, sourcing current, where the channel current c

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 13 Configuration There are seven input voltage state thresholds dete

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 14 Threshold online update The channel thresholds can be read or written us

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 15 Overvoltage Faults The analogue inputs are not designed to measure volta

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 16 Digital Inputs Thresholds Digital inputs are essentially analogue inputs

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 17 Line Monitoring and Marshalling for Volt-Free Inputs Field loops provi

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 18 T8403 TMR Inputs When using the TrustedTM TMR 24V dc Digital Input Modul

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 19 For systems conforming to AANSI/ISA non-incendive hazardous area

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 2 Table of Contents Analogue Inputs ...

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 20 T8424 120V ac Digital Input The T8424 is actually a T8431 analogue input

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 21 Non volt-free digital inputs The information above is for isolated volt-

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 22 Field powered inputs These inputs appear as a voltage signal, powered

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 23 Hall Effect and Open Collector/Open Drain These devices are all essentia

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 24 Zone Interface and Valve Monitor Inputs The T8448 and T8449 modules have

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 25 Configuration T8448 and T8449 inputs may be monitored by the ap

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 26 Frequency/Pulse Inputs The T8442 Speed Monitor Module is designed to mon

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 27 Digital Outputs Power Groups Digital Output module channels are arranged

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 28 Line Monitoring Outputs do not have threshold templates. Instead, the st

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 29 Output energised/on (state 4) This occurs when the channel output curren

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 3 Short circuit in field wiring or load (state 5) ...

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 30 No-load (Open Circuit) Threshold Triplicated Modules 8448, 8449, 8451, 8

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 31 It is advised to add load resistors to loads under about 20

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 32 Termination Powered digital output terminations are very simple, with mi

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 33 V_FIELD_GRP1V_FIELD_RTN_GRP1FIELDTERMINALSV_FIELD_RTN_GRP1 ( SK1 AND 2

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 34 ‘Standard’ cables have two short tails on the chassis end. These cables

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 35 Terminating Resistors Unused outputs should be commanded off/de-ene

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 36 If the relay load current is less than the minimum, an extra load resist

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 37 Caution Devices that cannot be reliably line monitored when de-energised

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 38 Analogue Outputs The Trusted T8480 Analogue Output module may be conside

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 39 Output energised (state 4) This state occurs with a load fitted w

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 4 Floating Earth Systems and Loop Isolation ...

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 40 Pulse Outputs Applications have occasionally required pulse-width modula

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 41 IO Real -100% to +100% Pulse width from continuous off demand

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 42 The pulse width bias factor is used when the valve moves faster in one d

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 43 Other Issues System Cable Design The diagrams below show how to wi

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 44 Analogue or Digital Input module to VFTA The T8842 VFTA has five power

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 45 Digital Output module to FTA, Standard Cable The ‘standard’ output c

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 46 Digital Output module to FTA, integral power cable The ‘integral powe

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 47 Digital Output module to VFTA The TC-209, TC-509, TC-210 and TC-510

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 48 Analogue Outputs Analogue output circuit options are the same as the di

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 49 Floating Earth Systems and Loop Isolation ICS Triplex Technology rec

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 5 Analogue Inputs Line monitoring Field loops providing analogue input

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 50 potentials applied serially across components. Where lightning strikes a

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 51 Cable earth and screen wires At either end of an I/O cable there may be

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 52 Free Wire Cables I/O cables without FTA or VFTA plugs are availa

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 53 TC-206/506/208/508 (40 Channel Output) These cables have a short connect

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 54 TC-216/516/218/518 (40 Channel Output with Integral Power) Power wires T

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 55 TC-602/702/604/704 (60 Channel Input) These cables are idented CH0

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 6 The T8842 Versatile Field Termination Assembly (VFTA) provides i

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 7 This circuit cannot be used. Usually the current loop is not even returne

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 8 The current loop allows 4mA to drive the device electronics. However, mo

TrustedTM AN-T80004 Field Loop Configuration Issue 10 Jun 13 AN-T80004 9 Millivolt inputs The T8840 allows a block of eight channels of a T8431 to