Allen-Bradley 1769-IF4I Analog Input Module

1769-IF4I Isolated 4-Ch Input by Allen-Bradley

Product Introduction

The Allen‑Bradley 1769-IF4I module belongs to the CompactLogix I/O family. It offers four isolated differential analog inputs. You can connect field devices that output current or voltage signals. For instance, pressure transmitters or temperature sensors work very well with this module. Moreover, each channel is individually isolated. This feature prevents ground loops and signal interference. Therefore, you get stable and accurate readings.

Additionally, the 1769-IF4I supports multiple signal ranges. It handles 0‑20 mA, 4‑20 mA, 0‑21 mA, and 3.2‑21 mA for current. For voltage, it accepts ±10V, 0‑10V, 0‑5V, and 1‑5V. The full voltage range extends to ±10.5V. A sigma‑delta converter inside the module ensures high accuracy. The resolution reaches 16 bits for unipolar signals. Consequently, this module suits precise measurement tasks.

Technical Specifications

Key Parameters:

• Number of inputs: 4 individually isolated differential channels

• Input current ranges: 0‑20 mA, 4‑20 mA, 0‑21 mA (full range), 3.2‑21 mA

• Input voltage ranges: ±10V, 0‑10V, 0‑5V, 1‑5V, ±10.5V full range

• Resolution: 16‑bit (unipolar)

• Converter type: Sigma‑Delta

• Rated working voltage: 30V AC / 30V DC

• Wire size: 22‑14 AWG solid copper wire (90°C)

• Recommended cable: Belden 8761 shielded cable

• Channel diagnostics: Over‑range, under‑range, open circuit, process alarms

• Power supply distance rating: Up to 8 modules from system power supply

• Heat dissipation: 3 Watts maximum

Mechanical & Environmental Parameters

The 1769-IF4I measures 118 mm in height (138 mm including mounting tabs), 87 mm in depth, and 35 mm in width. Its weight is approximately 0.65 kg. You can mount it on a DIN rail or a panel. The module works in open‑type enclosures. It requires a clean, dry industrial environment. Do not exceed Over Voltage Category II circuits. The operating temperature range is 0 to 60°C. Additionally, the storage temperature ranges from -40 to 85°C.

Installation Guide

First, ensure the system power supply is turned off. Next, mount the 1769-IF4I onto the DIN rail or panel. Connect it to the adjacent module using the bus interface. Then, wire your analog sensors to the removable terminal block. The replacement part number for this block is 1769-RTBN18. Use shielded cable like Belden 8761 to reduce noise. Keep cable lengths as short as possible. After wiring, insert the terminal block into the module. Finally, power up the system and check the fault LED. This LED turns on if any channel error or diagnostic failure occurs.

Why Choose This Isolated Analog Module?

The 1769-IF4I offers clear benefits over non‑isolated modules. For instance, individual channel isolation allows mixing signals from different power sources. You do not need external isolators. This saves panel space and lowers cost. Furthermore, the module supports both current and voltage inputs on the same device. You can configure each channel independently. The built‑in diagnostics help you find open circuits or out‑of‑range conditions quickly. Therefore, downtime decreases and maintenance becomes easier.

Compatibility

This module works with CompactLogix 5370 controllers and MicroLogix 1500. It also fits into any 1769 Compact I/O chassis. The bus interface supplies 5V and 24V DC power to the module. No external power supply is necessary. However, remember the power supply distance rating. You cannot place this module more than 8 slots away from the system power supply. Otherwise, voltage drop may occur.

Packaging List

• 1769-IF4I Analog Input Module (1 unit)

• Removable terminal block (compatible with 1769-RTBN18)

• Quick start user guide

• Bus connector cover

Note: No certificates or warranty documents are included in the package.

Shipping Information

We ship worldwide using FedEx, UPS, or DHL. The gross weight is 0.65 kg. Standard delivery takes 3‑7 business days. A tracking number will be provided after shipment.

Frequently Asked Questions (FAQ)

1. Can I mix current and voltage signals on the same 1769-IF4I module?
Yes, because each channel is individually isolated. You can wire a 4‑20 mA current loop to channel 0 and a ±10V voltage signal to channel 1 on the same 1769-IF4I without any ground loop issues.

2. What replacement terminal block works with the 1769-IF4I?
The correct replacement is part number 1769-RTBN18. This removable terminal block allows easy wiring changes without removing the module from the DIN rail.

3. How far can I place this module from the system power supply?
The power supply distance rating is 8. This means the 1769-IF4I must be installed no more than 8 modules away from the system power supply. Exceeding this limit may cause voltage drops.

4. What type of cable is best for wiring this analog input module?
Allen‑Bradley recommends Belden 8761 shielded cable. Using shielded cable reduces electrical noise and improves signal accuracy. Keep the cable length as short as possible.

5. Does the 1769-IF4I support single‑ended input wiring?
Yes, it supports both differential and single‑ended inputs. However, the module is designed with four individually isolated differential channels. For best noise rejection, differential wiring is recommended.