Allen-Bradley 1794-IT9 FLEX I/O Thermocouple Input Module
The Allen-Bradley 1794-IT9 serves as the primary 1794-IT9 Thermocouple Input Module utilized to execute analog signal acquisition across FLEX I/O platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-IT9 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | Standard FLEX I/O module weight |
| Dimensions | Standard FLEX I/O module profile |
| Operating Temp | Standard Allen-Bradley industrial operating range |
| Power Consumption | Standard FLEX I/O backplane power draw |
| Module Type | Thermocouple / mV Analog Input Module |
| Channels | 16 single-ended analog inputs |
| Input Range | -200 mV to +200 mV |
| Resolution | 12 bits |
| Conversion Time | 100 microseconds |
| Thermocouple Types | J, K, T, E, R, S, B, N, and W |
| Temperature Compensation | Built-in cold junction compensation (CJC) |
| Mounting | DIN rail mountable |
Backplane Bus Communication Velocity and Cold Junction Compensation
The Allen-Bradley 1794-IT9 provides high-speed 100-microsecond conversion time across 16 single-ended thermocouple channels, feeding digitized millivolt telemetry directly across high-velocity backplane bus architectures. Featuring integrated cold junction compensation (CJC) for high-accuracy temperature scaling across industrial ranges, the module suppresses thermal gradient errors during full-density I/O switching. Firmware flash compatibility ensures seamless real-time integration into EtherNet/IP, ControlNet, and Remote I/O control topologies.
Frequently Asked Questions
Q: Which thermocouple sensor types are supported by the 1794-IT9 input module?
A: The module supports direct connection to type J, K, T, E, R, S, B, N, and W thermocouples, as well as direct -200 mV to +200 mV analog voltage signals.
Q: How does the 1794-IT9 compensate for temperature variations at the terminal connections?
A: The module utilizes integrated cold junction compensation (CJC) algorithms and sensors to correct for thermal potential shifts at the field wiring terminal interfaces.
Field Installation Guidelines
- Configure the mechanical keying switch on the compatible FLEX I/O terminal base before snapping the 1794-IT9 module onto the DIN rail.
- Route thermocouple extension wire and low-level millivolt signal leads through dedicated, shielded wire ducts physically separated from high-voltage AC cables.
- Ground the signal cable shield braid at a single point on the designated enclosure grounding bus bar to eliminate ground loop current interference.
- Verify that channel power supply connections match specified polarities prior to initiating system calibration.
Allen-Bradley 1794-IT9 FLEX I/O Thermocouple Input Module
Allen-Bradley 1794-IT9 FLEX I/O Thermocouple Input Module
The Allen-Bradley 1794-IT9 serves as the primary 1794-IT9 Thermocouple Input Module utilized to execute analog signal acquisition across FLEX I/O platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1794-IT9 |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | Standard FLEX I/O module weight |
| Dimensions | Standard FLEX I/O module profile |
| Operating Temp | Standard Allen-Bradley industrial operating range |
| Power Consumption | Standard FLEX I/O backplane power draw |
| Module Type | Thermocouple / mV Analog Input Module |
| Channels | 16 single-ended analog inputs |
| Input Range | -200 mV to +200 mV |
| Resolution | 12 bits |
| Conversion Time | 100 microseconds |
| Thermocouple Types | J, K, T, E, R, S, B, N, and W |
| Temperature Compensation | Built-in cold junction compensation (CJC) |
| Mounting | DIN rail mountable |
Backplane Bus Communication Velocity and Cold Junction Compensation
The Allen-Bradley 1794-IT9 provides high-speed 100-microsecond conversion time across 16 single-ended thermocouple channels, feeding digitized millivolt telemetry directly across high-velocity backplane bus architectures. Featuring integrated cold junction compensation (CJC) for high-accuracy temperature scaling across industrial ranges, the module suppresses thermal gradient errors during full-density I/O switching. Firmware flash compatibility ensures seamless real-time integration into EtherNet/IP, ControlNet, and Remote I/O control topologies.
Frequently Asked Questions
Q: Which thermocouple sensor types are supported by the 1794-IT9 input module?
A: The module supports direct connection to type J, K, T, E, R, S, B, N, and W thermocouples, as well as direct -200 mV to +200 mV analog voltage signals.
Q: How does the 1794-IT9 compensate for temperature variations at the terminal connections?
A: The module utilizes integrated cold junction compensation (CJC) algorithms and sensors to correct for thermal potential shifts at the field wiring terminal interfaces.
Field Installation Guidelines
- Configure the mechanical keying switch on the compatible FLEX I/O terminal base before snapping the 1794-IT9 module onto the DIN rail.
- Route thermocouple extension wire and low-level millivolt signal leads through dedicated, shielded wire ducts physically separated from high-voltage AC cables.
- Ground the signal cable shield braid at a single point on the designated enclosure grounding bus bar to eliminate ground loop current interference.
- Verify that channel power supply connections match specified polarities prior to initiating system calibration.
