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Allen Bradley 1718 Ex I/O 1718-A20

1718-A20

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The 1718-A20 chassis from Allen-Bradley is a 20-slot chassis. It is part of the 1718 Ex I/O series. The 1718-A20 chassis can host 20 narrow I/O modules or 10 wide I/O modules.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with DO Supply's 2-year warranty.
Learn more

Technical specifications for 1718-A20

ManufacturerAllen-Bradley/Rockwell Automation
Series1718 Ex I/O
Part Number1718-A20
Product TypeChassis
Number of I/O Slots20
Number of Power Supply Slots2
Number of Supported Narrow I/O Modules20
Number of Supported Wide I/O Modules10
Extended ChassisSupported
Redundant Power SystemsSupported
Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.
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The 1718-A20 chassis is a 20-slot chassis from the Allen-Bradley/Rockwell Automation 1718 Ex I/O series. It can host up to 20 input and output modules at a time in the I/O slots along with adapter modules and power supply modules in their own specified slots. This chassis has 2 power supply slots, which means that it can support redundant power supply systems. The 1718-A20 chassis can be used to make an extended chassis by connecting to another 1718-A20 20-slot chassis or to a 1718-A10 10-slot chassis with an extension cable. This backplane can host 20 I/O modules if they are narrow I/O modules and it can host 10 I/O modules if they are wide I/O modules. The narrow modules only need 1 slot for installation while the wide modules need 2 slots.

The Allen-Bradley/Rockwell Automation 1718-A20 20-slot chassis from the 1718 Ex I/O series should never be tampered with, altered or modified in any unauthorized way, or used if it is damaged. Using a damaged, modified, or tampered chassis can cause device damage or malfunctioning and user injury or death. When the 1718-A20 2-slot chassis is used by itself or as the base chassis in an extended chassis system, it hosts an adapter module in the slot between the power supply module and the I/O modules. When it is used as one of the extension chassis in an extended chassis, the adapter module slot must remain empty because an adapter is not needed on an extension chassis.