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Allen Bradley MicroLogix 1500 1764-RTC
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1764-RTC

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The Allen-Bradley 1764-RTC is MicroLogix 1500 Real-Time clock module. This is an accessory module that provides accurate time and date reference used for scheduling operations and application. This module come with a non-replaceable battery with operating temperature of 0°C to +40°C (+32°F to +104°F) and minimum operation of 5 years. This RTC has an accuracy of +34 to -70 seconds/month at 0°C (+32°F); +36 to -68 seconds/month at +25°C (+77°F); +29 to -75 seconds/month at +40°C (+104°F) and -133 to -237 seconds/month at +55°C (+131°F).

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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.
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Technical specifications for 1764-RTC

ManufacturerRockwell Automation
Part Number/Catalog No.1764-RTC
BrandAllen-Bradley
Product Type:Real-Time Clock (RTC) module
RTC Accuracy+34 to -70 seconds/month at 0°C or +32°F); +36 to -68 seconds/month at +25°C or +77°F); +29 to -75 seconds/month at +40°C or +104°F) and -133 to -237 seconds/month at +55°C or +131°F.U104
RTC Battery operating expectancy5 years @ 0°C to +40°C (+32°F to +104°F)
RTC Battery storage expectancy5 years minimum @ -40°C to +25°C (-40°F to +77°F); 3 years minimum @ +26°C to +60°C (+79°F to +140°F)
RTC Battery:Built-in
RTC Battery replacement:Non-replaceable
Battery low status file:(RTC:0/BL)
Removal and Insertion under power:Supported
Memory size:Not applicable
SeriesMicroLogix 1500
FunctionRTC Module
FeaturesReal-Time Clock
Additional FeaturesReal-Time Clock
Enclosure TypeIP20
Output SourceRelay Port and DC FET
Product Lifecycle Status*Discontinued/Obsolete

* The Allen Bradley 1764-RTC has been discontinued by the manufacturer, however we specialize in obsolete parts and can likely still supply surplus and/or refurbished replacement 1764-RTC units instead of migration.

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.

The Allen-Bradley 1764-RTC is a Real-Time Clock (RTC) module that is used with MicroLogix 1500 controllers. This module is typically used to implement scheduled plant operation and processes, popular with Heating, Ventilation and Air Conditioning (HVAC) systems, Building Management systems (BMS) and some other applications. This accessory module is installed by removing the MicroLogix 1500 front panel cover. It provides accurate time and clock reference which can be accessed by the program through built-in instructions.

The 1764-RTC features clock accuracy that varies depending on the operating temperature. It has an accuracy of +34 to -70 seconds/month at 0°C or +32°F); +36 to -68 seconds/month at +25°C or +77°F); +29 to -75 seconds/month at +40°C or +104°F) and -133 to -237 seconds/month at +55°C or +131°F. When data to be written to the RTC module is verified valid by the system, the data is written immediately however, an invalid data cannot be written to the module. This prevents system and programming error from occurring to the controller.

Additionally, the 17640RTC comes with a non-replaceable battery. This battery is expected to operate at a minimum of 5 years when the host controller is operated at 0°C to +40°C or +32°F to +104°F). When stored, the RTC battery life expectancy is 5 years, minimum at -40°C to +25°C (-40°F to +77°F) and 3 years minimum at +26°C to +60°C (+79°F to +140°F). If the RTC battery is low but the controller remains powered, the RTC module operation is normal. If controller power is removed along a low-battery RTC, the RTC data may be lost upon completion of power cycle. The RTC can be disabled to lengthen the device’ operation.

Revision Part #Also known as
1764-RTC Ser A1764-RTC/A, Series A, Rev A
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