Allen Bradley 1764-MM2RTC Memory Module for MicroLogix 1500

Product Overview:

The Allen-Bradley 1764-MM2RTC is a dual-function memory module and Real-Time Clock (RTC) designed for MicroLogix 1500 controllers. Offering 16 KB of non-volatile memory, this module provides both program/data backup and time/date functionality for logging and scheduling tasks. It combines these two critical features into a single compact module, optimizing the use of controller resources.

The RTC is highly accurate, ensuring reliable time-keeping even under fluctuating temperatures. It has a battery life expectancy of up to 5 years under normal operating conditions, making it an ideal solution for long-term industrial automation applications.

With hot-swap capability, the 1764-MM2RTC can be inserted or removed without power-down, ensuring minimal downtime during system maintenance or upgrades. It is compatible with various MicroLogix 1500 base units and seamlessly integrates into systems using RSLogix 500 software for programming.

Key Features:

• Model: 1764-MM2RTC

• Manufacturer: Allen-Bradley

• Product Type: Memory & Real-Time Clock Module

• Compatible Controllers: 1764-LSP, 1764-LRP

• Compatible Base Units: 1764-24AWA, 1764-24BWA, 1764-28BXB

• Memory Capacity: 16 KB EEPROM

• RTC Accuracy:

• @ 0°C: ±34 to –70 sec

• @ +25°C: ±36 to –68 sec

• @ +40°C: ±29 to –75 sec

• @ +55°C: –133 to –237 sec

• Battery Type: Internal, non-replaceable

• Operating Temperature: 0°C to +55°C

• Storage Temperature: –40°C to +60°C

• Power Supply: Via controller backplane

• Current Draw: 350 mA @ 5 VDC

• Heat Dissipation: 1.75 W

• Enclosure Rating: IP20

• Software Compatibility: RSLogix 500

Technical Specifications:

Product Description:

The Allen-Bradley 1764-MM2RTC is a high-performance memory module for the MicroLogix 1500 controller, combining essential program/data backup with precise Real-Time Clock (RTC) functionality. This dual-purpose module provides 16 KB of non-volatile memory and ensures accurate time-keeping for scheduling and logging tasks.

With a built-in RTC, the module offers excellent accuracy across a broad temperature range, providing reliable time-stamping even in harsh industrial conditions. The internal battery guarantees a long lifespan, with 5 years of operation under typical environmental conditions. The real-time clock ensures proper time synchronization for industrial operations, which is crucial for scheduling tasks, logging events, or maintaining time-sensitive processes.

The 1764-MM2RTC is fully compatible with MicroLogix 1500 controllers, including 1764-LSP and 1764-LRP, and integrates easily into existing control systems. It supports hot-swap functionality, allowing it to be replaced without powering down the system. This is particularly useful in environments where uptime is critical.

The module’s compact design fits directly into the memory module slot of the MicroLogix 1500, making it a convenient solution for expanding the functionality of the controller without requiring additional hardware. It can be installed with minimal effort and does not require external wiring.

FAQ:

Q1: What is the memory capacity of the 1764-MM2RTC?
A1: The 1764-MM2RTC provides 16 KB of non-volatile memory for data and program backup.

Q2: What is the battery life expectancy of the 1764-MM2RTC?
A2: The internal battery has a 5-year life expectancy under normal operating conditions (0–40°C).

Q3: Can the 1764-MM2RTC be swapped out without powering down the system?
A3: Yes, the 1764-MM2RTC supports hot-swapping under power.

Q4: What software is compatible with the 1764-MM2RTC?
A4: The module is compatible with RSLogix 500 for programming and configuration.

Q5: What is the operating temperature range of the 1764-MM2RTC?
A5: The operating temperature range is from 0°C to +55°C.