Allen-Bradley 1769-ARM Address Reserve Module

Allen-Bradley 1769-ARM Address Reserve Module for CompactLogix Systems

Core Functionality and System Integration

• The primary role of the 1769-ARM is to reserve a single module slot within the I/O rack. It creates a placeholder in the I/O configuration, enabling the user program to reference a future module's position without errors.
• This module begins operation after establishing an I/O configuration and a user program. It inhibits all further configuration to that specific slot, preventing communication attempts with non-existent hardware.
• Program references to the slot occupied by the 1769-ARM must not use parameters from another module. This ensures the system reserves the slot cleanly, ready for the intended future device.
• The 1769-ARM features a 1-word input data file but contains no output or configuration data files. This minimal data footprint allows it to exist in the rack without interfering with control logic.
• When you need to install the actual I/O module later, simply insert the new hardware and deactivate module inhibition. This activates the module without requiring a program download that could stop the process.

Electrical Specifications and Power Requirements

• The 1769-ARM draws 60 mA at 5.1V from the backplane. This low current draw ensures minimal impact on the system power budget while maintaining its slot reservation function.
• It dissipates a maximum of 0.3 Watts of heat during operation. This low thermal output allows placement in dense I/O racks without contributing significantly to enclosure heat load.
• The module has a power supply distance rating of eight (8) modules. Install it within this distance from the power supply to maintain proper backplane communication and power delivery.
• Compatible power supplies include the 1769-PA2, 1769-PB2, 1769-PA4, and 1769-PB4. These provide the necessary 24V DC backplane power to the 1769-ARM and surrounding I/O modules.
• Isolation voltage rating is 30 Volts continuous, providing adequate protection for the backplane interface in industrial control environments.

Mechanical Specifications and Mounting Options

• The 1769-ARM measures approximately 118 x 35 x 87 mm (4.65 x 1.38 x 3.43 in.). Height increases to 138 mm (5.43 in.) when including the mounting tabs for DIN rail installation.
• It weighs approximately 0.62 lb (281 g), making it one of the lighter modules in the CompactLogix lineup. Shipping weight with packaging is approximately 2 lbs.
• Mounting options include standard DIN rail or direct panel mounting. This flexibility accommodates various enclosure designs without requiring specialized hardware or adapters.
• The module utilizes the same mechanical locking mechanism as other 1769 I/O modules. This tongue-and-groove system secures it to adjacent modules and ensures reliable backplane connections.
• It features an open-style enclosure rating, requiring installation inside a protective industrial enclosure. This protects the module from dust, moisture, and physical contact.

Environmental Specifications and Durability

• The 1769-ARM operates reliably in temperatures from 32 to 140°F (0 to 60°C). This range matches other CompactLogix components, ensuring consistent performance across the entire control system.
• Storage temperature range extends from -40 to 185°F (-40 to 85°C) with 5-95% relative humidity, non-condensing. These specifications ensure safe long-term storage before installation.
• Vibration resistance includes 5G peak-to-peak at 10-500 Hz for normal operation, with 2G for relay operation. This ensures reliable performance in mechanically active industrial environments.
• Shock ratings vary by mounting method. Panel-mounted installations withstand 30G operating shock, while DIN-rail mounted installations withstand 20G. Direct panel mounting offers superior mechanical disturbance resistance.
• Non-operating shock ratings reach 40G for panel-mounted and 30G for DIN-rail-mounted configurations. This ensures the module survives transportation and installation handling.

Frequently Asked Questions (FAQ)

• Is the Allen-Bradley 1769-ARM a new and original product?
  Yes, we supply the 1769-ARM as a brand new, original Allen-Bradley module. We source all products through authorized channels to guarantee authenticity and reliable performance.
• What is the purpose of the 1769-ARM Address Reserve Module?
  The 1769-ARM reserves a physical slot in your I/O rack for future expansion. It allows you to plan for additional modules without downloading new hardware configurations that could force a process stop.
• What controllers are compatible with the 1769-ARM?
  This address reserve module works with both CompactLogix controllers (such as the 1769-L31) and MicroLogix 1500 programmable controllers. It fits into any standard 1769 I/O rack.
• What are the power requirements for the 1769-ARM?
  The module draws 60 mA at 5.1V from the backplane and dissipates only 0.3 Watts of heat. It requires placement within 8 modules of a compatible power supply like the 1769-PA2 or 1769-PB2.
• Do you have the 1769-ARM in stock, and how quickly can you ship?
  Yes, we maintain stock of the 1769-ARM. We process and dispatch orders within 5 days, utilizing trusted carriers like FedEx, UPS, and DHL for worldwide delivery.
• What is the return policy for this Address Reserve Module?
  We offer a 30-day return window for the 1769-ARM. You may return it within this period provided it remains in its original condition and packaging.

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