The Allen Bradley 1769-IF4I is a 4-channel isolated analog input module for the CompactLogix and MicroLogix 1500 systems. Its core function is to convert analog current or voltage signals from field sensors—such as pressure transducers, temperature transmitters, and flow meters—into digital values for the controller. The "I" in the model number signifies isolated, meaning each of the four input channels is electrically isolated from the others and the backplane, providing superior noise immunity and protection against ground loops in demanding industrial environments.
Item No :
1769-IF4IOrder(MOQ) :
1Payment :
EXWProduct Origin :
USAShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.5kgProducts Description
Allen Bradley 1769-IF4I CompactLogix Analog Cur/Volt Input
| Model Number | 1769-IF4I |
| Place of Origin | USA |
| Dimension/Weight | 0.5 kg |
| Condition | new and original |
| Warranty | 1 year |
| Shipping term |
DHL Fedex TNT EMS UPS |
| Payment | TT / Western Union |
| Delivery Time | 3-5 days |
| Service |
24 Hours Online Service |
Key Parameters
| Item | Specifications / Features |
|---|---|
| Number of Inputs | 4 isolated differential analog inputs |
| Input Signal Types | Voltage: ±10V, 0-10V, 0-5V, 1-5V; Current: 0-20 mA, 4-20 mA |
| Resolution | 16-bit (unipolar); 15-bit plus sign (bipolar) |
| Converter Type | Delta-Sigma with per-channel independent A/D converters for simultaneous sampling |
| System Platform | CompactLogix Controllers; MicroLogix 1500 |
| Accuracy @ 25°C | Voltage: ±0.3% full scale; Current: ±0.35% full scale |
| Bus Current Draw | 5V DC: 40 mA; 24V DC: 110 mA |
| Power Dissipation, Max | 3.0 W |
| Isolation Voltage | 500V AC (channel-to-channel and channel-to-backplane) |
| Input Impedance | Voltage: 1 MΩ; Current: 240 Ω |
| Common Mode Rejection | >60 dB @ 50/60 Hz (with 10 Hz filter) |
| Operating Temperature | 0°C to 60°C |
| Dimensions (H x W x D) | 118 mm × 35 mm × 87 mm (4.65 x 1.38 x 3.43 in.) |
| Weight | Approx. 0.30 kg (0.65 lbs) |
| Power Supply Distance Rating | 8 modules |
Per-Channel Isolation and Superior Noise Immunity: The module's standout feature is its individually isolated channels with dedicated A/D converters . Unlike the non-isolated 1769-IF4 which uses a single multiplexed converter, the 1769-IF4I allows each channel to be sampled simultaneously, providing faster update times and eliminating measurement errors caused by ground potential differences between sensors . This makes it ideal for applications where sensors are powered from different sources or are located far apart.
High Precision and Diagnostic Capabilities: With 16-bit resolution and an accuracy of ±0.3% for voltage and ±0.35% for current, the module provides highly precise measurements . It includes comprehensive diagnostics, such as over-range and under-range detection, process alarms, and open-circuit detection for current inputs, all of which are accessible via the controller's status tags for real-time monitoring and troubleshooting .
Flexible Configuration and Fast Update Rates: Each channel can be independently configured for voltage or current input, and the input filter can be selected to balance noise rejection with update speed . The module's parallel architecture enables significantly faster updates compared to non-isolated modules, with each channel updating independently in approximately 5 ms .
Robust Design for Industrial Environments: The module is c-UL-us listed for Class I, Division 2 hazardous locations and is CE certified, ensuring suitability for demanding industrial applications . It is designed for a Pollution Degree 2 environment and supports both DIN rail and panel mounting, providing installation flexibility .
The 1769-IF4I is widely used in industrial automation applications requiring high-precision analog signal acquisition with isolation, including:
Process Control: Monitoring pressure, temperature, flow, and level from transmitters in chemical, oil & gas, and water treatment plants where sensors may have different ground potentials.
Machine Control: Reading feedback from sensors on packaging machines, conveyors, and material handling equipment in electrically noisy environments.
Data Acquisition: Connecting a mix of current and voltage output sensors for centralized monitoring and analysis, where ground loops would otherwise corrupt measurements.
Q1: What is the main difference between the 1769-IF4 and the 1769-IF4I?
A: The key difference is channel isolation and A/D converter architecture. The 1769-IF4 is a non-isolated module with a single multiplexed converter that samples channels sequentially. The 1769-IF4I provides per-channel isolation (500V AC channel-to-channel) and individual A/D converters, allowing all four channels to sample simultaneously. This results in better noise immunity, faster update times, and the ability to handle sensors with different ground references .
Q2: Can the 1769-IF4I accept both voltage and current inputs simultaneously?
A: Yes. Each of the four channels is independently configurable in the software (Studio 5000 Logix Designer) for either voltage or current input .
Q3: What is the purpose of the iRtn jumper for current inputs?
A: For current input wiring, a jumper must be placed between the Ch#- and Ch#_iRtn terminals on the terminal block for each channel used in current mode. This provides the return path for the module's internal 250Ω current-sense resistor. Without this jumper, the channel will report 0 mA or an under-range value without asserting a fault bit—a common commissioning error .
Q4: What is the typical update rate for the 1769-IF4I?
A: The 1769-IF4I provides significantly faster updates than the non-isolated 1769-IF4. Each channel updates in approximately 5 ms, and all four channels can update simultaneously due to the individual A/D converters. The non-isolated 1769-IF4 takes about 10 ms per channel, for a total of approximately 40 ms to scan all four channels .
Q5: Can the 1769-IF4I be used with a MicroLogix controller?
A: Yes, the 1769-IF4I is compatible with the MicroLogix 1500 system as expansion I/O . For CompactLogix controllers, it mounts directly on the DIN rail with the controller.
The 1769-IF4I is part of the 1769 Compact I/O family. Below are related models for expanding or replacing your analog input capabilities:
| Product/Model | Type | Brief Description |
|---|---|---|
| 1769-IF4 | Analog Input Module | 4 channels, voltage/current, non-isolated, 14-bit resolution. Lower cost alternative when isolation is not required . |
| 1769-IF4I | Analog Input Module | The featured module: 4 channels, isolated, voltage/current, 16-bit resolution, per-channel A/D converters . |
| 1769-IF8 | Analog Input Module | 8-channel version of the standard (non-isolated) analog input module . |
| 1769-IF8C | Analog Input Module | 8-channel, current-only analog input module with higher density . |
| 1769-IF16C | High-Density Analog Input | 16-channel, current-only analog input module with 16-bit resolution . |
| 1769-RTBN18 | Replacement Terminal Block | Replacement removable terminal block for the module . |
For applications with different sensor grounds or noise: The 1769-IF4I is the recommended choice, providing per-channel isolation and 16-bit resolution for critical measurements .
For cost-sensitive applications with common ground: The 1769-IF4 offers a lower-cost alternative when all sensors share the same ground reference and isolation is not required .
For more than 4 channels: Consider the 1769-IF8 (8-channel non-isolated), 1769-IF8C (8-channel current-only), or 1769-IF16C (16-channel current-only) .
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The Allen Bradley 1769-IF4 is a 4-channel analog input module for the CompactLogix and MicroLogix 1500 systems. Its core function is to convert analog signals from field sensors—such as pressure transducers, temperature transmitters, and flow meters—into digital values for the controller to process. It supports multiple current and voltage signal types with 14-bit resolution and offers built-in diagnostics for reliable operation.
The Allen Bradley 1769-IF4I is a 4-channel isolated analog input module for the CompactLogix and MicroLogix 1500 systems. Its core function is to convert analog current or voltage signals from field sensors—such as pressure transducers, temperature transmitters, and flow meters—into digital values for the controller. The "I" in the model number signifies isolated, meaning each of the four input channels is electrically isolated from the others and the backplane, providing superior noise immunity and protection against ground loops in demanding industrial environments.
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