Catalogs > Automation Systems Catalog > Programmable Controllers > MicroLogix 1500 System > System Overview
System Overview
| Introduction |  |
System Components | |
Product Design | |
Communication | |
Typical Configurations | |
General Specifications | |
Additional Resources | |
MicroLogix 1500 system components include:
- Processor (1764 -LRP or -LSP, required)—The MicroLogix 1500 processor is a separate module that slides into the base unit. The processor houses a keyless mode switch and two built-in 3/4-turn analog trim potentiometers with a digital output range from 0 to 250. The processor also provides the interface for optional real-time clock and memory modules, and for the Data Access Tool.
- Base Unit (required)—Each MicroLogix 1500 system requires a base unit. The base unit includes embedded I/O and power supply, and provides space for installation of the processor. Three base units are available, each with a different configuration of built-in I/O:
- 1764-24AWA —Twelve 120V AC inputs and twelve relay outputs, 120V AC power.
- 1764-24BWA —Twelve 24V DC inputs and twelve relay outputs, 120V AC power.
- 1764-28BXB—Sixteen 24V DC inputs and six DC FET plus six relay outputs, 24V DC power.
- 1764-24AWA —Twelve 120V AC inputs and twelve relay outputs, 120V AC power.
- Compact I/O Modules (1769 series, optional)—Choose from a variety of digital and analog input and output modules. Up to 16 modules can be connected to the MicroLogix 1500 base unit, depending on current draw and power dissipation. Individual modules install to the right of the base unit, or up to 3 feet away through use of an expansion cable (1769-CRRx,-CLLx, or-CRLx) and power supply (1769-PA2, -PA4, -PB2, or -PB4). An end cap (1769-ECR for a right end or 1769-ECL for a left end), or one end of an expansion cable, is required at each end of each bank of Compact I/O modules.¬
- Real-Time Clock and Memory Modules (optional)—Real-time clock and memory modules provide memory backup, a real-time clock, or both. Real-time clock data can be accessed by user programs. The real-time clock can be synchronized with an external time source via a program instruction. Three modules are available:
- 1764-MM1RTC—8K-word combination memory and real-time-clock.
- 1764-MM2RTC—16K-word combination memory and real-time-clock.
- 1764-MM1—8K-word memory only.
- 1764-MM2—16K-word memory only.
- 1764-RTC—Real-time-clock only.
- 1764-MM1RTC—8K-word combination memory and real-time-clock.
- Data Access Tool (1764-DAT, optional)—The Data Access Tool allows monitoring and adjustment of user-defined integer and bit data. It provides 48 “electronic push buttons,” 48 “electronic digital trim potentiometers,” and two function keys. The Data Access Tool can be inserted into or removed from the controller while the system is running, allowing on-line data adjustments.
¬ The x in catalog numbers 1769-CRRx and 1769-CRLx stands for the number 1 (a one-foot cable) or 3 (a 3-foot cable).