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Allen Bradley 1769sc-IT6I Isolated Thermal Input Module

Configured for thermocouple and millivolt signal acquisition in CompactLogix and SLC control platforms, the Allen Bradley 1769sc-IT6I (1769sc-IT6I Isolated Thermal Input Module) provides direct physical and electrical measurement of temperature and low-level voltage signals.

Hardware Specifications

Parameter	Specification
Model	1769sc-IT6I
Brand	Allen Bradley
Origin	USA
Product Type	Isolated Thermal Input Module
Product Line	CompactLogix
Series	SLC
Module Type	Thermocouple / mV Input Module
Weight	2.00 lbs (0.91 kg)
Power Consumption	150 mA at 5 V maximum; 35 mA at 24 V maximum
Input Channels	6 individually isolated inputs
Input Types	6 TC, mV
Compatible Thermocouple Types	J, K, T, E, R, B, S, N, C, and L
Compatible mV Signals	+/-50 mV and +/-100 mV
Resolution	16 bits
Input Voltage Range	50-100 mV
Input Impedance	Greater than 1 Mohm
Channel-to-Channel Isolation	125 VAC
Field Wiring-to-Backplane Isolation	125 VAC
Field Wiring-to-Chassis Ground Isolation	125 VAC
Input Filter Options	4.17 Hz, 10 Hz, 16.7 Hz, 19.6 Hz, 62 Hz, and 470 Hz
Channel Update Time	0.244 sec, 0.104 sec, 0.064 sec, 0.055 sec, 0.020 sec, and 0.006 sec
Input Overvoltage Protection	+/-35 VDC continuous
Backplane Current Required	150 mA at 5 V maximum; 35 mA at 24 V maximum
Certifications	UL/cUL Listed, ANSI ISA 12.12.01 Class I Div 2 Groups ABCD, CE
Recommended Cable	Shielded twisted-pair TC extension wire for thermocouple inputs; Belden 8761 or equivalent for mV inputs
UPC	850637004151

Industrial PLC I/O Integration and Signal Isolation

The 1769sc-IT6I uses individually isolated input channels to separate thermocouple and millivolt signal paths. Therefore, the module reduces interference between measurement circuits and supports direct connection of multiple field temperature devices.

The module provides 16-bit signal conversion and supports multiple thermocouple types, including J, K, T, E, R, B, S, N, C, and L. Additionally, it accepts +/-50 mV and +/-100 mV analog signals for low-level measurement applications.

The Allen Bradley CompactLogix platform communicates with this module through the controller I/O architecture. The design supports PLC-based temperature monitoring systems where channel isolation and signal accuracy are required.

Frequently Asked Questions

Q: How many thermocouple input channels does the 1769sc-IT6I provide?
A: The module provides six individually isolated thermocouple and millivolt input channels.

Q: What thermocouple sensor types can the 1769sc-IT6I process?
A: The module supports Type J, K, T, E, R, B, S, N, C, and L thermocouple sensors.

Q: What cable type should be used for field wiring?
A: Use shielded twisted-pair thermocouple extension wire for TC signals and Belden 8761 or equivalent cable for millivolt inputs.

Field Installation Guidelines

Install the 1769sc-IT6I according to the controller platform installation requirements and maintain proper module alignment within the I/O assembly.

Use shielded twisted-pair wiring for thermocouple connections to reduce electrical noise. Connect cable shields according to the plant grounding standard and avoid routing sensor wiring near high-current power conductors.

Verify thermocouple polarity before commissioning because reversed connections can produce incorrect temperature readings. Also, check field wiring insulation and isolation conditions before applying power to the module.

Maintain proper separation between low-level millivolt signals and switching circuits to reduce measurement disturbances. Confirm the configured input type matches the connected sensor before placing the control system into operation.

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