Allen-Bradley 1747-AICR panel-mounted Isolated Link Coupler

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Overview

The Allen-Bradley 1747-AICR is a panel-mounted Isolated Link Coupler designed for the SLC 500 programmable logic controller platform. It establishes a safe connection between SLC processors (as well as other DH-485 peripherals) and a DH-485 communication network.

Specifications

Description

The 1747-AICR from Allen Bradley functions as an isolated link coupler, enabling SLC 500 devices to communicate within DH-485 networks. Designed with versatility in mind, this unit supports various peripherals, including the 1747-DTAM-E data table axis modules and the 1747-PIC personal interface converters.

With a removable 6-position terminal block, users can easily manage connections. The insulation between the communication cable and connected devices is rated at 1500V DC, ensuring electrical safety during operation. The coupler accommodates full-duplex and half-duplex DH-485 communication cables as well.

Ideal for various industrial environments, it operates effectively within a temperature range of 32 to 140 degrees Fahrenheit and can withstand storage temperatures as low as -40 degrees Fahrenheit and as high as 185 degrees Fahrenheit. This device also operates within a non-condensing relative humidity range of 5% to 95%, making it suitable for a wide range of applications.

FAQ

Q1. What distinguishes the AB 1747-AICR from conventional communication interface modules in SLC 500 architectures?
The AB 1747-AICR is specifically engineered to provide isolated RS-232/RS-485 communication while minimizing ground loop interference. Its isolation capability enhances signal integrity and improves communication reliability across industrial automation networks.

Q2. Why is the AB 1747-AICR considered essential for maintaining communication stability in electrically noisy environments?
The AB 1747-AICR incorporates optical isolation technology that shields communication circuits from electrical transients and common-mode voltage differences. This significantly reduces the risk of data corruption in harsh industrial applications.

Q3. How does the AB 1747-AICR facilitate seamless integration between SLC 500 controllers and external serial devices?
The AB 1747-AICR serves as a communication isolator, enabling secure data exchange between SLC 500 processors, programming terminals, HMIs, and other serial devices through compatible RS-232 and RS-485 interfaces without compromising system performance.

Q4. Which installation considerations should engineers evaluate before deploying the AB 1747-AICR in an automation system?
When installing the AB 1747-AICR, engineers should verify communication cable specifications, interface compatibility, power requirements, grounding practices, and environmental conditions to ensure dependable long-term operation and optimal communication efficiency.

Q5. How can the AB 1747-AICR improve the operational resilience of industrial communication networks?
The AB 1747-AICR enhances network resilience by electrically isolating connected devices, reducing susceptibility to electromagnetic interference, preventing ground loop currents, and ensuring stable serial communications for mission-critical industrial control systems.

Related - DH-485 Network

The DH-485 communication network allows devices on the plant floor to share information. Via the network, application programs can:

• monitor process and device parameters and status, including fault and alarm detection.

• perform data acquisition.

• perform supervisory control functions.

• upload/download PLC programs over the network.

The network offers connection to up to 32 nodes, token passing access control, and the ability to add or remove nodes without disrupting the network. DH-485 supports slave devices and features multiple-master capability.

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