Catalogs > Automation Systems Catalog > I/O > In-Cabinet Distributed I/O > 1797 FLEX Ex I/O
1797 FLEX Ex I/O
| Introduction |  |
Product Design | |
Typical Configurations | |
Specifications | |
Communications Adapter | |
Digital I/O Modules | |
| Analog I/O Modules | |
Counter I/O Modules | |
HART Smart Instrumentation | |
Terminal Bases | |
Power Supplies | |
Accessory Products | |
- Configurable channels allow the module to be used with a variety of sensors.
- Selectable input filters allows you to select from several different filter frequencies for each channel that best meets the performance needs of your application based on environmental limitations. Lower filter settings provide greater noise rejection and resolution. Higher filter settings provide faster performance.
- On-board scaling eliminates the need to scale the data in the controller. Controller processing time and power are preserved for more important tasks, such as I/O control, communications, or other user-driven functions.
FLEX Ex Analog Input Modules
- Resolution: 16 bits
- Accuracy: 0.1%
- Data format: Configurable
| Cat. No. | Number of Inputs | Input Signal Range¬ | Update Time, Module from Adapter | Step Response to 99% of Full Scale | Power Dissipation, Max. | Terminal Base Unit |
| 1797-IE8 | 8 single-ended | 0…20 mA | 200…1600 ms | 4 ms | 5.2 W | 1797-TB3, 1797-TB3S |
| 1797-IE8HT | 8 single-ended | 0…20 mA | 200…1600 ms | 80 ms | 5.2 W | 1797-TB3, 1797-TB3S |
| 1797-IE8NF‡ | 8 single-ended | 0…20 mA | 200…1600 ms | 80 ms | 5.2 W | 1797-TB3, 1797-TB3S |
| ¬ Each module's channels are selectable. T Supports pass-through of HART commands as unscheduled ControlNet messages. Compatible with FDT software packages. ‡ With noise filter. |
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FLEX Ex RTD Theromcouple/mV Input Module
| Cat. No. | Number of Inputs | Input Signal Range | Power Dissipation, Max. | Terminal Base Unit |
| 1797-IRT8 | 8 RTD, Thermocouple/mV | 0…500 W -40…100 mV TC RTD |
1.6 W | 1797-TB3, 1797-TB3S |
| Features | |
| RTD Mode | • 2-, 3-, 4-wire connection • sensor lead breakage and short circuit detection all 4 leads • measuring resistance 0…500W • accuracy: 0.1% of span @ 20 °C, filter cutoff <1 Hz |
| mV Mode | • input voltage -40…100 mV differential sensing • sensor breakage detection |
| Thermocouple Mode | • types B, E, J, K, TXK/XK (L), N, R, S, T • cold junction compensation (CJC) • sensor breakage detection • accuracy: 0.1% of span, filter cutoff <1 Hz • accuracy of CJC: ±1 C/K |
FLEX Ex Analog Output Modules
- Resolution: 13 bits
- Accuracy: 0.1%
- Channel update: £4 ms
| Cat. No. | Number of Outputs | Output Signal Range¬ | Step Response to 99% of Full Scale | Power Dissipation, Max. | Terminal Base Unit |
| 1797-OE8 | 8 single-ended | 4…20 mA | 4 ms | 5.4 W | 1797-TB3, 1797-TB3S |
| 1797-OE8HT | 8 single-ended | 4…20 mA | 4 ms | 6.1 W | 1797-TB3, 1797-TB3S |
| ¬ Each module's channels are selectable. T Supports pass-through of HART commands as unscheduled ControlNet messages. Compatible with FDT software packages. |
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1797-OE8 and -OE8H Output Voltage/Current Capability
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Certifications
| Cat. No. | Certifications¬ |
| 1797-IE8 | CENELEC: II (1) 2G EEx ia/ib IIB/IIC T4 II (1D) (2D) UL, C-UL: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 Class II Division 1 Groups E, F, G; Class III FM: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 INMETRO: BR-Ex ib IIB/IIC T4 |
| 1797-IE8NF | CENELEC: II (1) 2G EEx ia/ib IIB/IIC T4 II (1D) (2D) UL, C-UL: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 Class II Division 1 Groups E, F, G; Class III FM: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 |
| 1797-IRT8 | CENELEC: II (1) 2G EEx ia/ib IIB/IIC T4 II (1D) (2D) UL, C-UL: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 Class II Division 1 Groups E, F, G; Class III FM: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 INMETRO: BR-Ex ib IIB/IIC T4 |
| 1797-OE8 | CENELEC: II (1) 2G EEx ia/ib IIB/IIC T4 II (1D) (2D) UL, C-UL: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 Class II Division 1 Groups E, F, G; Class III FM: Class I Division 1 Groups A...D T4 Class I Zone 1 AEx ib/[ia] IIC T4 INMETRO: BR-Ex ib IIB/IIC T4 |
| ¬ See the Product Certification link at http://www.ab.com for declarations of Conformity, Certificates, and other certification details. For additional certification information, see the FLEX Ex System Certification manual, publication 1797-6.5.6. | |