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Allen Bradley PLC 5 1771-DRS1

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1771-DRS1

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The 1771-DRS1 from Allen Bradley is a Static RAM SIMM memory module designed for specific applications. It boasts a memory capacity of 1 MB and operates effectively within a 24 V DC system setting.

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Ships from Raleigh, NC
2 Year DO Supply Warranty
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 of our products come with DO Supply's 2-year warranty.
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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.

Technical specifications for 1771-DRS1

ManufacturerAllen Bradley
Product TypeStatic RAM SIMM memory module
Product LinePLC 5
Part Number1771-DRS1
Weight0.06 lbs (0.03 kg)
Memory Capacity1 MB SRAM
Memory TypeVolatile static RAM
Compatible ControllersDMC, DMC1, DMC4, DXPS coprocessors
Installation PointCoprocessor SIMM socket
Socket SupportSingle or dual SIMM configuration
Battery Backup SupportSupported with compatible revisions
Typical Power DrawUnder 1.5 W
Communication MethodInternal coprocessor bus
I/O CapabilityNo direct field I/O
Operating Voltage Context24 V DC system environment
Operating Temperature0 to 60 °C
Enclosure RatingIP20 open style installation
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The Allen Bradley 1771-DRS1 is a specialized static RAM SIMM memory module, offering a capacity of 1 MB. This component is crucial for enhancing the memory capabilities of compatible controllers including DMC, DMC1, DMC4, and DXPS coprocessors. It connects directly to the coprocessor SIMM socket for straightforward implementation. The design accommodates both single and dual configurations of SIMM, granting flexibility based on system requirements.

This memory module operates within a 24 V DC environment, making it suitable for various applications. Its internal structure utilizes volatile static RAM, which means it requires power to retain information. Battery backup support is provided for compatible versions, ensuring data retention during power interruptions. Operating efficiently, it typically draws under 1.5 W of power.

Communication with the host system occurs through an internal coprocessor bus. However, the module does not support any direct field I/O capabilities. The temperature range in which it can reliably function extends from 0 °C to 60 °C, accommodating a variety of industrial conditions. Additionally, this product is rated at IP20, indicating it is open-style installed without specific protection against dust or moisture infiltration.