Allen-Bradley 1771-IC Digital DC Input Module for PLC-5 Systems

Essential Technical Specifications

• Manufacturer & Brand: Rockwell Automation / Allen-Bradley
• Series Compatibility: PLC-5
• Model Number: 1771-IC
• Module Type: Digital DC Input Module
• Input Count & Type: 8 inputs, Sink-type (Source Load)
• Operating Voltage Range: 42-56 Volts DC
• Voltage Category: 10-60 Volts DC
• Backplane Current: 74 Milliamperes

Performance & Signal Characteristics

• The module features advanced input filtering for noise suppression.
• Typical ON-state signal delay measures 15 milliseconds with a ±7 ms tolerance.
• Typical OFF-state signal delay measures 20 milliseconds with a ±15 ms tolerance.
• Maximum DC off-state current is limited to 3.7 Milliamperes.
• This input filtering significantly reduces downtime from electrical noise.
• The conformal coating protects against harsh industrial environments.

Installation & Compatibility Details

• You can install the 1771-IC module directly into any PLC-5 I/O chassis.
• The module requires a wiring arm with catalog number 1771-WN for proper connection.
• It works perfectly with both 2-wire and 3-wire field devices and sensors.
• For 3-wire applications, ensure the off-state leakage does not exceed 4mA.
• Module dimensions are 3.5 x 6.5 x 2.0 inches (89 x 165 x 51 mm).

Device Compatibility & Applications

• This module interfaces directly with DC proximity switches and limit switches.
• It works effectively with float switches, pushbuttons, and selector switches.
• You can connect photoelectric sensors and other industrial control devices.
• The robust design handles typical industrial voltage transients and contact bounce.

Packaging & Shipping Information

• Your order includes one genuine Allen-Bradley 1771-IC Digital DC Input Module.
• We protect the module with a static-shield bag during packaging and shipping.
• We ship all orders worldwide via reliable carriers including FedEx, UPS, and DHL.
• You will receive full tracking information immediately after we dispatch your order.

Frequently Asked Questions (FAQ)

• What type of input circuitry does the 1771-IC module use?
• The module uses sink-type input circuitry designed to work with source load field devices.
• What is the purpose of the input filtering on this module?
• The input filtering suppresses electrical noise and contact bounce, enhancing reliability.
• Can I use this module with both 2-wire and 3-wire field devices?
• Yes, the module supports both 2-wire and 3-wire devices with proper leakage current consideration.
• What is the maximum voltage this input module can withstand?
• The module operates within 42-56V DC but can withstand voltages up to 60V DC in its category.
• What accessories are required for installing this module?
• You need the 1771-WN wiring arm for proper field wiring connections to the module.

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