Description

Allen-Bradley 1756-IT6I is a ControlLogix analog input module with six isolated Thermocouple channels, designed for temperature measurement. It supports various Thermocouple types, including B, E, J, K, R, S, T, N, C, D, and L, with a 16-bit resolution. 

General Info

• Part Number: 1756-IT6I
• Series: ControlLogix
• Module Type: Analog Thermocouple Module
• Inputs: 6 Isolated Thermocouple channels, 1 CJC
• Supported Sensors: B, E, J, K, R, S, T, N, C, D, L (TXK/XK)
• Resolution: 16 bits
• Input Range: -12 to 78 mV (standard), -12 to 30 mV (high resolution)
• Data Format: Integer mode (left-justified, 2s complement), IEEE 32-bit floating point
• Power Dissipation: 4.3 Watts
• Backplane Current (5V): 250 mA
• Backplane Current (24V): 125 mA
• Scan Time: 25 ms min (millivolt, floating point), 50 ms min (temperature, floating point), 10 ms min (millivolt, integer)

Features

• Input Channels: 6 isolated Thermocouple inputs
• Resolution: 16-bit, with high-resolution range of 0.7 µV/bit
• Accuracy: ±0.3 to 3.2°C depending on the channel and CJC
• Thermocouple Linearization: ITS-90
• Overvoltage Protection: 120V AC/DC
• Noise Rejection: 60 dB (normal mode at 60 Hz), 120 dB (common mode at 60 Hz)
• Diagnostic Features: Wire-off detection, process alarms, rate alarms
• Signal Conversion: Integer or floating-point formats
• Communication Modules: Compatible with ControlLogix processors

Specifications

• Input Range: -12 to 78 mV (typical), -12 to 30 mV (high resolution)
• Input Impedance: 10 MΩ
• Channel Bandwidth: 15 Hz (-3 dB)
• Maximum Power Dissipation: 4.3 Watts
• Thermal Dissipation: 14.66 BTU/hour
• Scan Time:
  • 25 ms min (floating point, millivolt)
  • 50 ms min (floating point, temperature)
  • 10 ms min (integer, millivolt)
• Overvoltage Protection: 120V AC/DC
• Module Error: 0.5% of range

Environmental

• Operating Temperature: 0°C to 60°C
• Storage Temperature: -40°C to 85°C
• Relative Humidity: 5% to 95% (non-condensing)