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    FLEX I/O Isolated Output HART Analog Module 

Publication 1794-IN120D-EN-P - September 2015

Specifications  

Specifications – FLEX I/O Isolated Output Analog Module – 1794-OF8IH

Attribute

Value

Number of outputs

8 single-ended, isolated

Recommended terminal base unit

1794-TB3, 1794-TB3S

Resolution

16-bits – unipolar

Current

0.305 

μ

A/cnt – unipolar

Data format

Engineering Units

(3)

 

Percent of Full Scale

 

RAW/Proportional Count

Conversion type

16-bits digital to analog converter

Conversion rate

10 ms

Output current terminal

4...20 mA (user configurable)

 

0...20 mA (user configurable)
0 mA output until product is configured

Settling Time

70 ms, 0...99%

Normal mode rejection ratio – current 
terminal

>70 dB @ 50/60 Hz (4.17 Hz ADC conversion rate)

 

>65 dB @ 50/60 Hz (10.0 Hz ADC conversion rate)

 

>75 dB @ 50 Hz (16.7 Hz ADC conversion rate)

 

>85 dB @ 60 Hz (19.6 Hz ADC conversion rate)

Common mode rejection ratio

>60 dB @ 50 Hz

 

>60 dB @ 60 Hz

Load resistance

0...750 

Ω

 standard

Load reactance, max

10 

μ

H

Absolute accuracy

(1)

± 0.1% full scale @ 25 °C

 

± 0.35% full scale @ 0...55 °C

Accuracy drift with temperature

(1)

± 0.008% / °C

 

0.0038% full scale / °C

Calibration required

Factory calibrated

Maximum overload

30V continuous or 32 mA continuous, one channel at a time

Isolation voltage

120V (continuous), Basic Insulation Type

 

Type tested @ 1000V AC for 60 s, between User power to 
system, channel to system, and channel to channel.

Flexbus current

80 mA @ 5V DC

Power dissipation, max

5.0 W @ 24V DC

Thermal dissipation, max

17.06 BTU/hr @ 24V DC

Содержание 1794-OF8IH

Страница 1: ...ous Location Approval 5 Install the Module 7 Wire the Module 8 Ground the Module9 9 Module Wiring 10 Cyclic HART Input Data 17 Status Indicator 19 Specifications 20 IMPORTANT This module can only be used with 1794 ACN R 15 with version 5 1 or greater firmware or 1794 AENT with version 4 2 or greater firmware The 1794 AENT currently ships with version 4 1 firmware For more information about using t...

Страница 2: ...ular installation Rockwell Automation Inc cannot assume responsibility or liability for actual use based on the examples and diagrams No patent liability is assumed by Rockwell Automation Inc with respect to use of information circuits equipment or software described in this manual Reproduction of the contents of this manual in whole or in part without written permission of Rockwell Automation Inc...

Страница 3: ...es to prevent or minimize the spread of flame complying with a flame spread rating of 5VA V2 V1 V0 or equivalent if non metallic The interior of the enclosure must be accessible only by the use of a tool Subsequent sections of this publication may contain additional information regarding specific enclosure type ratings that are required to comply with certain product safety certifications In addit...

Страница 4: ...sont combinés dans un système le code de température le plus défavorable code de température le plus faible peut être utilisé pour déterminer le code de température global du système Les combinaisons d équipements dans le système sont sujettes à inspection par les autorités locales qualifiées au moment de l installation EXPLOSION HAZARD Do not disconnect equipment unless power has been removed or ...

Страница 5: ...on com products certification for details The type of protection used is EX nA IIC T4 Gc according to EN 60079 15 Compliance with the Essential Health and Safety Requirements has been assured by compliance with EN 60079 15 2010 and EN 60079 0 2012 A11 2013 reference certificate number DEMKO 07ATEX0724242X ATTENTION This equipment is not resistant to sunlight or other sources of UV radiation WARNIN...

Страница 6: ...s from separate power supplies ATTENTION Do not exceed a length of 3 m 9 8 ft for DC power cabling ATTENTION To comply with the CE Low Voltage Directive LVD all connected I O must be powered from a source compliant with the following Safety Extra Low Voltage SELV or Protected Extra Low Voltage PELV WARNING If you insert or remove the module while backplane power is on an electrical arc can occur T...

Страница 7: ...igure and complete the following 1 Rotate the keyswitch 1 on the terminal base 2 clockwise to position 4 as required for this type of module Description Description 1 Keyswitch 5 Alignment bar 2 Terminal base 6 Groove 3 Flexbus connector 7 Latching mechanism 4 Module ATTENTION During mounting of all devices be sure that all debris metal chips wire strands etc is kept from falling into the module D...

Страница 8: ... and figure and complete the following 1 Connect individual input wiring to numbered terminals on the 0 15 row A as indicated in the table using Belden 8761 cable for signal wiring 2 Connect each channel signal return to the associated terminal on row A IMPORTANT You cannot install the module unless the connector is fully extended WARNING If you remove or insert the module while the backplane powe...

Страница 9: ...from terminal 33 common on this base unit to terminal 16 on the next base unit 6 For both 1794 TB3 and 1794 TB3S bases connect wiring shields to functional earth ground as near as possible to the module Ground the Module All I O wiring must use shielded wire Shields must be terminated external to the module such as bus bars and shield terminating feed throughs ATTENTION To reduce susceptibility to...

Страница 10: ...Current O0 A 0 Current O0 Ret A 1 1 Current O1 A 2 Current O1 Ret A 3 2 Current O2 A 4 Current O2 Ret A 5 3 Current O3 A 6 Current O3 Ret A 7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 18 19 20 21 22 23 33 24 25 26 27 28 29 30 31 32 17 35 36 37 38 47 48 49 50 34 51 16 39 40 41 42 43 44 45 46 Row A Row B Row C Row A Row B Row C Actuator 1794 TB3S shown 44552 Label placed at top of wiring area Actuator A...

Страница 11: ...nnected in the terminal base unit Word Bit 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0 0 F7 F6 F5 F4 F3 F2 F1 F0 Diagnostic Status 1 Reserved 2 C7 C6 C5 C4 C3 C2 C1 C0 Reserved 3 X7 X6 X5 X4 X3 X2 X1 X0 Reserved Fn Cn Xn Channel n Wire Fault Alarm for open or short circuit 1 Channel n HART Current Fault HART Device Transmitter present 1 This alarm is disabled in Analog 0 20 mA formats Formats 0 1 3 or i...

Страница 12: ...Data 3 Channel 2 Output Data 4 Channel 3 Output Data 5 Channel 4 Output Data 6 Channel 5 Output Data 7 Channel 6 Output Data 8 Channel 7 Output Data DGn GR R Channel n Digital Output Data Valid in Digital mode only Global reset Resets all latched wire fault alarms Reserved 0 Output 0 mA 1 1 Output 22 mA 0 Inactive 1 Active 1 When Open Wire Detect is Enabled 0 100 μA on Output Note Reserved data ma...

Страница 13: ... L3 AFS3 CH2 HART Current Ratio L2 AFS2 6 CH5 HART Current Ratio L5 AFS5 CH4 HART Current Ratio L4 AFS4 7 CH7 HART Current Ratio L7 AFS7 CH6 HART Current Ratio L6 AFS6 8 DF7 DF6 DF5 DF4 DF3 DF2 DF1 DF0 DM7 DM6 DM5 DM4 DM3 DM2 DM1 DM0 9 Channel 0 Analog Fault Value Output Data 10 Channel 1 Analog Fault Value Output Data 11 Channel 2 Analog Fault Value Output Data 12 Channel 3 Analog Fault Value Out...

Страница 14: ...nt Ratio HART current fault ratio limit on channel n Valid values are 0 or 5 31 percent of full scale A value of 0 disables this feature Refer to HART Current Ratio table for more information ASFn Channel n Analog Fault Mode Selection Refer to the Channel Analog Fault Mode Selection table Ln Channel n Enable Latching of wire fault 0 Unlatched 1 Latched DFn Channel n Digital Fault Mode Selection 0 ...

Страница 15: ...y values requiring more than one word for example 32 bit float values 0 1 0 1 Byte Swap byte swap all words in data table 1 1 1 1 Big Endian Format all data entries in true Big Endian format Bits 9 8 Analog Fault Mode Decimal Value 1 0 Min Scale 0 0 0 Max Scale 1 0 0 Hold Last State 2 1 0 User Specified Data Value 3 1 1 Bits 15 14 13 12 11 HART Current Ratio Limit Decimal Value 7 6 5 4 3 Disabled ...

Страница 16: ...ion 0 0 0 0 0 0 20 mA in Milliamps 0 00 22 00 0 0 000 mA 22000 22 000 mA 1 0 μA 1 0 0 0 1 0 20 mA in Full Scale 0 00 22 00 0 0 11000 110 00 2 0 μA 3 0 0 1 1 0 20 mA in UINT 0 20 00 0 65535 0 3052 μA 4 2 2 HART Communications supported with these data formats only 0 1 0 0 4 20 mA in Milliamps 2 00 22 00 2000 2 000 mA 22000 22 000 mA 1 0 μA 7 2 0 1 1 1 4 20 mA in UINT 4 00 20 00 0 65535 0 2441 μA 14...

Страница 17: ...5535 1 4 4 20 mA in Milliamps 2000 1 1 These values are under or over the supported user range and are clamped at the lowest highest supported values 2000 4000 20000 22000 7 4 20 mA in UINT 0 1 0 1 0 65535 65535 1 14 4 20 mA in Full Scale 1250 1 1250 0 10000 11250 IMPORTANT The HART Input Data for a channel may be zeroes if HART communications is disabled for that channel For more information on d...

Страница 18: ...nt 11 12 CH0 SV Units Code CH0 PV Units Code 13 CH0 FV Units Code CH0 TV Units Code 14 25 Words 2 13 for channel 1 26 37 Words 2 13 for channel 2 38 49 Words 2 13 for channel 3 50 61 Words 2 13 for channel 4 62 73 Words 2 13 for channel 5 74 85 Words 2 13 for channel 6 86 97 Words 2 13 for channel 7 CHn HART CMD 3 Communication Status 0 HART CMD 3 Communication Disabled or No Error 1 HART CMD 3 Co...

Страница 19: ...tus HART CMD 3 Response second status byte Refer to User Manual CHn HART Loop Status Bit 0 HART Enable Bit 1 Device Connected Bit 2 Response Error Bit 3 CMD 48 Update Bit 4 HART Loop Tolerance Error Bit 5 HART Update Bit 6 HART Message Bit 7 0 Disabled 0 Not connected 0 No HART message failure 0 CMD 48 not updated 0 No HART current fault 0 HART device information not updated 0 No new message 1 Ena...

Страница 20: ... 99 Normal mode rejection ratio current terminal 70 dB 50 60 Hz 4 17 Hz ADC conversion rate 65 dB 50 60 Hz 10 0 Hz ADC conversion rate 75 dB 50 Hz 16 7 Hz ADC conversion rate 85 dB 60 Hz 19 6 Hz ADC conversion rate Common mode rejection ratio 60 dB 50 Hz 60 dB 60 Hz Load resistance 0 750 Ω standard Load reactance max 10 μH Absolute accuracy 1 0 1 full scale 25 C 0 35 full scale 0 55 C Accuracy dri...

Страница 21: ...re code T4 IEC temperature code T4 Keyswitch position 4 Enclosure type rating None open style Wire size Determined by installed terminal base Wire type Shielded Wiring category 2 2 on signal ports 3 on power ports Compatibility HART 5 Device supported 2 3 4 wires 1 Includes offset gain non linearity and repeatability error terms 2 Use this conductor category information for planning conductor rout...

Страница 22: ... Damp Heat 5 95 non condensing Vibration IEC60068 2 6 Test Fc Operating 5 g 10 500 Hz Shock operating IEC60068 2 27 Test Ea Unpackaged shock 20 g Shock nonoperating IEC60068 2 27 Test Ea Unpackaged shock 25 g Emissions CISPR 11 Group 1 Class A ESD immunity IEC 61000 4 2 6 kV contact discharges 8 kV air discharges Radiated RF immunity IEC 61000 4 3 10V m with 1 kHz sine wave 80 AM from 80 2000 MHz ...

Страница 23: ...l Immunity EN 61000 6 4 Industrial Emissions EN 61131 2 Programmable Controllers Clause 8 Zone A B European Union 94 9 EC ATEX Directive compliant with EN 60079 15 Potentially Explosive Atmospheres Protection EN 60079 0 2012 General Requirements II 3G Ex nA IIC T4 Gc DEMKO 007ATEX0724242X KC Korean Registration of Broadcasting and Communications Equipment compliant with Article 58 2 of Radio Waves...

Страница 24: ...shipped from the manufacturing facility However if your product is not functioning and needs to be returned follow these procedures Documentation Feedback Your comments will help us serve your documentation needs better If you have any suggestions on how to improve this document complete this form publication RA DU002 available at http www rockwellautomation com literature United States or Canada ...

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