1756-IF8IH

Name: 1756-IF8IH
Brand: ROCKWELL
SKU: 1756-IF8IH

The Allen Bradley 1756-IF8IH is an 8-point HART isolated analog input module designed for the ControlLogix system. It offers 8 isolated differential current inputs with 0-20 or 4-20 milliamp ranges and 16-21 bit resolution, making it suitable for various industrial automation needs.

Product Model1756-IF8IH

Product ID108556

Stock on Request

Last updated: 8/29/2026

Quantity

Key Features

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1. Compatibility with ControlLogix SystemThe Allen Bradley 1756-IF8IH is specifically designed to integrate seamlessly with the ControlLogix system, ensuring smooth operation and efficient data processing in industrial automation environments.
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2. 8 Isolated Differential Current InputsWith 8 isolated differential current inputs, this module provides a high level of input flexibility, allowing for the connection of multiple sensors and transmitters simultaneously.
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3. HART Communication ProtocolThe module supports the HART (Highway Addressable Remote Transducer) communication protocol, enabling the transmission of data between devices using a single wire, reducing the need for additional communication infrastructure.
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4. High Resolution and AccuracyThe 1756-IF8IH offers a resolution of 16-21 bits, ensuring high accuracy in data measurement and processing. This is particularly crucial in applications where precise control and monitoring are essential.

Technical Specifications

Detailed engineering parameters based on manufacturer documentation

Specifications may be subject to change without notice

Parameter

Value

Parameter

Value

Input Signal

0-20mA, 4-20mA

Isolation

250V (continuous), reinforced insulation type, inputs to backplane

Number Of Channels

Input, current

Yes

Input, voltage

Yes

Input, resistor

5. Overvoltage Protection and Open-Circuit DetectionThe module includes overvoltage protection up to ±24 volts and open-circuit detection, which allows it to report negative full-scale values and handle open-circuit conditions effectively, reducing the risk of data errors and ensuring reliable operation.

Input, resistance thermometer

Input, thermocouple

Input signal, configurable

Yes

Output, current

Output, voltage

Output signal configurable

Analogue inputs configurable

Yes

Analogue outputs configurable

Type of electric connection

Screw-/spring clA connection

Input offset drift with temperature

<=300 Î¼A/Â°C

Wire type

Copper

Terminal block torque specifications

1756-TBCH: 0.5 Nm (4.4 in-lb)

Inrush current

400mA @ 5V, 450mA @ 24V

Input conversion method

Sigma-Delta ADC (24-bit converter)

Module keying

Electronic, software configurable

Module error over full temperature range

0.3% of range (all filters) with HART disabled

Input range

0...20 mA (0...20.58 mA), 4...20 mA (3.42...20.58 mA)

Data format

32-bit floating point

Wire category

2 - on signal ports

Common mode noise rejection

>90 dB @ 50/60 Hz (10 Hz, 15 Hz or 20 Hz filters only)

Normal mode noise rejection

>90 dB @ 50 Hz and 60 Hz with 10 Hz filter, >74 dB @ 50 Hz and 60 Hz with 15 Hz filter, >33 dB @ 50 Hz and >90 dB @ 60 Hz with 20 Hz filter

Gain drift with temperature

20 ppm/Â°C

Voltage and current ratings

Backplane: 210mA @ 5.1V DC, 110mA @ 24V DC, Input voltage range: 5...30V DC, Input current range: 0...20mA @ 4...20mA

Typical module HART dynamic variables update time for all channels

1 s typical if all channels are HART enabled Pass through messages, handheld communications, sary masters, communication errors, or configuration changes can significantly increase the update time.

Module scan time

18...488 ms (filter dependent) for all channels - analog, minimum

Inputs

Eight current inputs

Resolution

16 to 21 bit

Wire size

Single wire connection (1756-TBCH): 0.33...2.1 mm2 (22...14 AWG) solid or stranded shielded copper wire, rated at 105 Â°C (221 Â°F) or greater, 1.2 mm (3/64 in.) insulation maximum, Single wire connection (1756-TBS6H): 0.33...2.1 mm2 (22...14 AWG) solid or

Calibrated accuracy

0.15...1.5% of full scale, filter dependent@ 25 Â°C with HART disabled, 1.5% of full scale with 250 Hz filter @ 25 Â°C with HART enabled, 0.5% of full scale with 100 Hz filter @ 25 Â°C with HART enabled, 0.2% of full scale with 50 Hz or 60 Hz filter @ 25 Â°C

Open circuit detection time

5 s (4...20 mA range only)

Suitable for safety functions

Power dissipation within module

4 W

Input overvoltage protection

28.8V DC

Surrounding air temperature, max

60 Â°C

North American temperature code

Emissions

IEC 61000-6-4

ESD immunity

6 kV contact discharges, 8 kV air discharges

EFT/B immunity

Â±2kV @ 5kHz on signal ports

Relative humidity

5...95% noncondensing

Conducted RF immunity

10V rms with 1 kHz sine wave 80% AM from 150 kHz...80 MHz on shielded signal ports

Surge transient immunity

Â±2 kV line-earth (CM) on shielded signal ports

Operating temperature

0 Â°C <Ta <60 Â°C (32 Â°F <Ta <140 Â°F)

Radiated RF immunity

10 V/m with 1 kHz sine-wave 80% AM from 80...2000 MHz, 10 V/m with 200 Hz 50% pulse 100% AM @ 900 MHz, 10 V/m with 200 Hz 50% pulse 100% AM @ 1890 MHz, 3 V/m with 1 kHz sine-wave 80% AM from 2000...2700 MHz

Nonoperating temperature

-40 Â°C

RTB keying

User-defined mechanical

Vibration

2 G @ 10...500 Hz

Shock

Operating: 30 G, Non operating: 50 G

Slot width

Calibration interval

12 mo typical

ATEX temperature code

IECEx temperature code

Input impedance

250 ? Â±5 ?

Isolation voltage

250V (continuous), Reinforced insulation type, inputs to backplane, Basic insulation type, input to input, and inputs to ground.

Enclosure type rating

None (open-style)

Repairable

REPAIRABLE

Preferred Availability

true

Quick Turnaround

false

Dimension Height

5.461

Lead Time

Dimension Width

18.288

Dimension Length

21.844

Stock Status

STOCKED

Weight

0.379

Weight Unit