Allen-Bradley 1769-IF4 Compact I/O 4-Channel Analog Input

Four configurable analog inputs for CompactLogix racks

The Allen-Bradley 1769-IF4 is the general-purpose analog input module of the 1769 Compact I/O family. It reads four channels that can be wired as differential or single-ended, with each channel set to a voltage range of 0-10 V, 0-5 V, 1-5 V or ±10 V, or to a current range of 0-20 mA or 4-20 mA. That mix of ranges makes it a common choice for pressure, level, flow and temperature transmitters on skid-mounted CompactLogix systems.

Resolution is 14 bits unipolar and 14 bits plus sign bipolar, with accuracy of ±0.2 percent of full scale for voltage and ±0.35 percent for current at 25 °C. Four filter settings, from 50 Hz to 500 Hz, trade noise rejection against speed: the 50 Hz setting gives a 60 ms step response and 22 ms channel update, while the 500 Hz setting gives 6 ms and 4 ms.

Technical specifications

Wiring and power notes

Each input has its own plus and minus terminals; current inputs use an internal 250 ohm shunt and voltage inputs present 220 kilohms. Use shielded cable for field signals. Both input terminals must stay within ±10 V DC of analog common, and exceeding the overload ratings of ±30 V DC or ±32 mA can damage the input circuit. The module also accepts an optional Class 2 24 V DC supply of 20.4 to 26.4 V DC, which brings the 24 V backplane draw to zero.

The module needs a 1769 power supply and must lie within eight modules of it. When designing the rack, add the 120 mA at 5.1 V DC and 60 mA at 24 V DC to the bus budget of the controller or power supply.

Where the 1769-IF4 fits

Use the 1769-IF4 when a mix of 4-20 mA loops and 0-10 V signals is needed. For sixteen 4-20 mA points in one slot, the 1769-IF16C is the high-density alternative; for analog outputs see the 1769-OF4 and 1769-OF8C. The terminal block, door label and door are replaceable parts that are ordered separately.

Documents and quotation

The Rockwell Automation 1769 Compact I/O specifications document is attached and contains the full tables, wiring diagrams and certification table. Related products are in our PLC and I/O cards category, including the 5069-L320ER CompactLogix 5380 controller. Confirm the exact catalog number, series letter and firmware or hardware revision on the product label, and the compatibility with your existing system, before ordering. Stock and lead time are confirmed at quotation.

How the 1769-IF4 Works

Each channel of the 1769-IF4 is measured by a delta-sigma converter. For voltage ranges the signal is applied across a high-impedance input; for current ranges the loop current flows through the internal 250 ohm shunt and the converter reads the resulting voltage. Differential wiring measures each channel between its own plus and minus terminals and rejects noise that appears on both conductors, while single-ended wiring ties the minus terminals to a common reference.

The filter frequency chosen for each channel sets how long the converter averages the signal. The 50 Hz and 60 Hz filters give strong rejection of mains interference with a slower update; the 250 Hz and 500 Hz filters update faster with less filtering. Each channel can be enabled or disabled, and the module reports over-range and under-range status bits that the CompactLogix or MicroLogix 1500 program can use for alarms.

1769-IF4 Selection & Ordering Guide

• Channel count: four channels in the 1769-IF4; the 1769-IF8 offers eight, and the 1769-IF16C sixteen current inputs.
• Signal types: the 1769-IF4 handles both voltage and current on each channel, which suits panels with mixed instruments.
• Coated version: order the 1769-IF4K where a conformal-coated module is required.
• Platform: used in 1769 banks with a CompactLogix controller, as MicroLogix 1500 expansion I/O or with a 1769 adapter.
• Power: confirm the 1769 power supply and the bus current budget, or plan the optional external 24V DC supply.

Send the series letter and controller type when you request a quote. Our team can help confirm the correct ordering code.

Installation & Maintenance

Remove power before installing or removing the module. Wire each channel with shielded twisted-pair cable, grounding the shield at one end only, and route the cable away from power, motor and drive conductors. Tighten terminal screws to the specified torque. In service, monitor the channel status bits, check readings with a calibrated loop calibrator or voltage source, and keep the enclosure ventilated and clean.

Typical Applications in Oman & the GCC

• Packaged skids for oil and gas, chemical injection and compressors running CompactLogix.
• Pumping stations and water treatment plants measuring level, pressure and flow.
• HVAC, chillers and district cooling plants with temperature and pressure transmitters.
• Food, beverage and packaging machines needing a few analog signals.

Keep the cabinet within the 0 to 60 °C operating range in hot plant rooms.

Why Source the 1769-IF4 from Seven Star LLC

Seven Star LLC supplies Allen-Bradley Compact I/O modules, including the 1769-IF4, across Oman and the GCC. Request a quote with the catalog number and quantity.