The Allen-Bradley 1769-IT6 is a high-accuracy thermocouple and millivolt input module designed for CompactLogix and MicroLogix 1500 systems.It provides six individually isolated channels capable of interfacing with various thermocouple types or low-level millivolt signals for precise temperature monitoring in industrial processes.
Specifications
Number of Inputs:6 isolated differential channels.
Input Types:Thermocouple types J, K, T, E, R, S, B, N, C, and ±50mV or ±100mV signals.
Resolution:14-bit resolution for high-precision data conversion.
Backplane Current:100 mA at 5.1V DC and 45 mA at 24V DC.
Common Mode Rejection:Greater than 115 dB at 60 Hz for noise mitigation.
Input Impedance:Greater than 10 MΩ for minimal signal loading.
Isolation Voltage:30V AC/DC continuous isolation between channels and from channel to backplane.
Cold Junction Compensation:Integrated CJC sensors for accurate temperature measurement across the terminal block.
Features
Individual Channel Isolation:Each of the six channels is electrically isolated to prevent ground loops and protect against high common-mode voltages.
Versatile Signal Support:Supports a wide range of standard thermocouples and raw millivolt inputs, providing flexibility for diverse thermal applications.
Open-Circuit Detection:Automatically detects and reports broken thermocouple wires or sensor failures to the controller.
On-Board Diagnostics:Features front-panel LED indicators for module status and individual channel health for rapid troubleshooting.
Filter Frequency Selection:Programmable digital filters (50 Hz, 60 Hz, 250 Hz, or 500 Hz) to optimize the trade-off between speed and noise rejection.
