Isolated Analog Input Module Allen-Bradley 1771-ILK

Product Overview

The 1771-ILK is an isolated analog input module from Allen-Bradley. It belongs to the PLC-5 family. This module has 8 individually isolated differential inputs. Each channel provides 1000 volts of isolation. It supports natural binary or BDC scaling to +/-9999. The resolution is 15 bits plus sign. The update time is 500 milliseconds for all 8 channels. This module uses a backplane current of 1.3 amperes. No external power is required. It uses a 1771-WF wiring arm. The module also has conformal coating for protection. A status indicator shows module health.

Application Scenarios

This module works in industrial automation systems. It reads analog signals from sensors. Common sensors include temperature, pressure, and flow devices. The isolated inputs protect against ground loops. Use it in harsh electrical environments. It fits in Allen-Bradley PLC-5 racks. Many factories rely on these modules for reliable data acquisition. The 15-bit resolution suits precise measurements. The multiple ranges handle various signal types. It is ideal for process control and monitoring.

Technical Specifications

Input Characteristics

The 1771-ILK has 8 differential inputs. Each input is isolated to 1000V DC. The data format is natural binary or BDC. Scaling reaches +/-9999. Voltage ranges include 0-5V, 1-5V, +/-5V, 0-10V, and +/-10V DC. Current ranges include 4-20 mA, 0-20 mA, and +/-20 mA.

Performance

Channel update time is 500 ms for all 8 channels. Resolution is 15 bits plus sign. Typical AC signal delay (off) is 24 ms +/-10 ms. Typical DC signal delay (off) is 20 ms +/-9 ms.

Power

Backplane current is 1.3 A. No external power is needed.

Mounting

Mount the module in a PLC-5 rack. Use the 1771-WF wiring arm. The module has conformal coating.

Installation & Maintenance Guide

Install the module into a standard PLC-5 slot. Ensure the backplane connector aligns. Secure the module with screws. Attach the wiring arm for field wiring. Connect signals to the correct terminals. Power up the system and check the status light. No special maintenance is required. Keep the module clean and dry. Avoid static discharge during handling.

Packing List

The package includes one Allen-Bradley 1771-ILK module. It also includes the 1771-WF wiring arm. A quick start guide is provided. All items are shipped via FedEx, UPS, or DHL.