AI843: Thermocouple/mV Input Module for Precision Temperature
The AI843 is the Thermocouple/mV Input Module for Precision Temperature covered on this page. The attribute that decides whether it fits the existing installation without modification is 16 bits.
This configuration's thermocouple/mv input module for precision temperature is the attribute that drives the replacement decision. On a rack I/O module the configuration that matters is the one that decides whether the unit drops into the existing slot and speaks the existing signal. thermocouple/mv input module for precision temperature sets channel count, voltage or current class and isolation behaviour — the three things that decide compatibility with the backplane, the field wiring and the rest of the I/O. Matching 16 bits against the rack rather than a generic datasheet avoids a module that installs but does not interface.
| Feature | Specification |
|---|---|
| Manufacturer | ABB |
| Brand | ABB |
| Part Number | AI843 |
| Resolution | 16 bits |
| Input impedance | > 1 MΩ |
| Isolation | Groupwise isolated from ground |
| Error | Max. 0.1% |
| Temperature drift | Typ. 10 ppm/°C, Max. 25 ppm/°C |
| Input filter (rise time 0-90%) | 1.1 kHz |
| Update cycle time | 320 + 80 * (no of active channels) ms at 50 Hz, 267 + 67 * (no of active channels) at 60 Hz |
| Maximum field cable length | 600 meters (656 yards) or max. 500 Ω |
| CMRR, 50Hz, 60Hz | 100 dB |
| NMRR, 50Hz, 60Hz | > 40 dB |
| Rated insulation voltage | 50 V |
| Dielectric test voltage | 500 V a.c. |
| Power dissipation | 1.5 W |
| Current consumption +5 V Modulebus | 60 mA |
| Current consumption +24 V Modulebus | 50 mA |
| Current consumption +24 V external | 0 |
| Operating temperature | 0 to +55 °C (+32 to +131 °F) |
| Storage temperature | -40 to +70 °C (-40 to +158 °F) |
| Protection class | IP20 |
| Weight | 0.157 kg (0.35 lbs.) |
| Dimensions | Width 45 mm (1.77”), Depth 102 mm (4.01”), 111 mm (4.37”) including connector, Height 119 mm (4.7”). |
Related Configurations
Other published configurations in the same family — confirm the distinguishing specification against your installation:
| Related Part Number | Configuration Difference |
|---|---|
| abb-ai845-analog-input-module-8-channel-hart-compatible-s800-series | confirm the configuration against your installation |
Availability & Condition at AutoDCSTech
| Part Number | AI843 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | Switzerland |
