Product Overview for the 1756-L73 ControlLogix Processor

The 1756-L73 is a ControlLogix processor from Allen-Bradley. Firstly, this module is manufactured by Rockwell Automation under the Allen-Bradley brand. Specifically, the 1756-L73 is a Logix 5570 type controller in the ControlLogix product line. In addition, this Programmable Automation Controller (PAC) is compatible for use in controlling large factory or process automation applications. The processor supports both simplex and high-availability redundant configurations. Consequently, the 1756-L73 provides flexible control solutions for demanding industrial environments. Therefore, this processor is ideal for large-scale automation systems requiring high performance and reliability.

Memory and Processing Capabilities

8 MB User Memory
The 1756-L73 offers substantial memory for complex control applications. Firstly, the user memory capacity is 8 Mbytes for program and data storage. In addition, the I/O memory is 0.98 MB for handling large I/O configurations. Specifically, the processor supports 32 controller tasks simultaneously. Each task can handle up to 100 programs for extensive logic organization. Consequently, the 1756-L73 accommodates sophisticated control strategies across multiple machine zones. Therefore, you can implement complex automation without memory constraints.

Energy Storage Technology
The 1756-L73 features battery-free energy storage technology. Firstly, this technology eliminates the need for a battery to retain volatile memory contents. In addition, the energy storage module preserves program and data during power loss. Specifically, no battery replacement is required for ongoing maintenance. Consequently, the 1756-L73 reduces maintenance costs and eliminates battery-related failures. Therefore, this processor is ideal for applications where battery maintenance is difficult or undesirable.

Multi-Language Programming Support
The 1756-L73 supports multiple IEC 61131-3 programming languages. Firstly, relay ladder logic is available for discrete control applications. In addition, structured text handles complex mathematical and data manipulation tasks. Specifically, function block diagram is ideal for process control loops. Sequential function chart organizes state-based and batch control sequences. Consequently, the 1756-L73 accommodates different programming preferences and application requirements. Therefore, you can choose the best language for each control task.

I/O Capacity and System Configuration

128,000 Total I/O Capacity
The 1756-L73 handles massive I/O counts for large control systems. Firstly, the maximum total I/O is 128,000 discrete input and output signals. In addition, the maximum analog I/O is 4,000 channels for process applications. Specifically, the maximum digital I/O is also 128,000 points. Consequently, the 1756-L73 controls entire production facilities from a single processor. Therefore, system architecture remains simple even for very large applications.

Local and Distributed I/O Support
The 1756-L73 supports both local and distributed I/O topologies. Firstly, local I/O configuration places I/O modules in the same chassis as the processor. In addition, distributed I/O topology installs expansion I/O remotely from the processor. Specifically, the extended communication bus connects remote I/O racks to the controller. Consequently, the 1756-L73 provides flexible I/O placement for optimal system design. Therefore, you can locate I/O near field devices to reduce wiring costs.

Chassis Compatibility
The 1756-L73 installs into any 1756 ControlLogix chassis. Firstly, compatible chassis models include 1756-A4, 1756-A7, 1756-A10, 1756-A13, and 1756-A17 series. In addition, the processor occupies a single slot in the chassis. Specifically, the processor can be installed in any slot of the 1756 chassis. Consequently, the 1756-L73 offers flexible mounting options within the ControlLogix architecture. Therefore, you can position the processor optimally for your system layout.

Communication Capabilities

Integrated USB 2.0 Port
The 1756-L73 includes a USB 2.0 port for local communication. Firstly, this port supports speeds up to 12 Mbps at full speed. In addition, the USB connection is ideal for programming and firmware updates. Specifically, a standard USB cable connects the processor to a programming workstation. Consequently, the 1756-L73 provides convenient local access without network configuration. Therefore, commissioning and troubleshooting are simplified significantly.

Supported Network Protocols
The 1756-L73 supports numerous industrial communication protocols. Firstly, Ethernet/IP provides high-speed plant-wide networking. In addition, ControlNet supports deterministic I/O control and messaging. Specifically, DeviceNet connects to smart sensors and actuators. Other supported protocols include SynchLink, Data Highway Plus (DH+), Remote I/O (RIO), and third-party protocols. Consequently, the 1756-L73 integrates into virtually any industrial network architecture. Therefore, you can connect to existing Allen-Bradley systems and third-party devices.

Protocol Converter Support
The 1756-L73 can communicate through gateways and protocol converters. Firstly, this capability extends connectivity to legacy and non-Allen-Bradley devices. In addition, the processor is compatible with any Allen-Bradley encompass partner ControlLogix modules. Specifically, these partnerships ensure tested interoperability with third-party products. Consequently, the 1756-L73 serves as a universal controller for mixed-vendor environments. Therefore, you can upgrade systems incrementally without replacing all field devices.

Integrated Motion Control

The 1756-L73 includes integrated motion control capabilities. Firstly, it supports SERCOS interface for high-performance servo drives. In addition, analog motion sensors provide position feedback for simpler applications. Specifically, motion control over Ethernet/IP coordinates multi-axis systems across the network. Consequently, the 1756-L73 handles both discrete control and precision motion in a single controller. Therefore, separate motion controllers are not required for many applications.

Power and Environmental Specifications

Power Supply Compatibility
The 1756-L73 requires a compatible ControlLogix power supply. Firstly, standard power supplies include 1756-PA50, 1756-PA72, 1756-PA75, and 1756-PB50, 1756-PB72, 1756-PB75. In addition, redundant power supplies such as 1756-PA75R and 1756-PB75R support high-availability configurations. Specifically, high-capacity power supplies are recommended for fully populated chassis. Consequently, the 1756-L73 integrates with various power options for different system sizes. Therefore, you can match the power supply to your specific I/O configuration.

Current Draw and Thermal Dissipation
The 1756-L73 consumes minimal power for its processing capacity. Firstly, the current draw at 5.1 Volts DC is 800 milliamperes. In addition, the current draw at 1.2 Volts DC is only 5.0 milliamperes. Specifically, the power dissipation is 2.5 Watts. The thermal dissipation is 8.5 BTU per hour. Consequently, the 1756-L73 adds little heat to the control cabinet. Therefore, cooling requirements are minimal even in dense chassis configurations.

Technical Specifications of the 1756-L73

General Specifications

• Manufacturer: Rockwell Automation.

• Brand: Allen-Bradley.

• Part Number / Catalog No.: 1756-L73.

• Series: ControlLogix.

• Description: ControlLogix Logix5673 Processor.

• Module Type: ControlLogix Controller.

• Enclosure: None (Open-Style).

• UPC: 10612598876034.

Memory Specifications

• User Memory: 8 MB.

• I/O Memory: 0.98 MB.

• Maximum Tasks: 32.

• Maximum Programs per Task: 100.

• Memory Backup: Energy storage technology (battery-free).

I/O Capacity Specifications

• Maximum Total I/O: 128,000.

• Maximum Digital I/O: 128,000.

• Maximum Analog I/O: 4,000.

Communication Specifications

• Integrated Port: One (1) USB 2.0 (up to 12 Mbps).

• Supported Protocols: Ethernet/IP, ControlNet, DeviceNet, SynchLink, DH+, RIO.

• Third-Party Support: Gateways and protocol converters.

• Motion Control: SERCOS, analog motion sensors, Ethernet/IP motion.

Programming Languages

• Supported Languages: Relay ladder, structured text, function block diagram, sequential function chart.

Power Specifications

• Current Draw (5.1 Volts DC): 800 milliamperes.

• Current Draw (1.2 Volts DC): 5.0 milliamperes.

• Power Dissipation: 2.5 Watts.

• Thermal Dissipation: 8.5 BTU per hour.

Isolation Specifications

• Isolation Voltage: 30 Volts Continuous (basic insulation).

• Tested Isolation: 500V AC for 60 seconds.

Physical Specifications

• Slot Width: 1 slot.

• Weight: Approximately 0.25 kg.

• Wiring Category: 3 on USB ports.

Environmental Specifications

• Operating Temperature: 0 to 60 degrees Celsius.

• Non-Operating Temperature: -40 to 85 degrees Celsius.

• Maximum Surrounding Temperature: 60 degrees Celsius.

• Relative Humidity: 5% to 95% non-condensing.

• Operating Vibration (10-500 Hz): 2 g.

• Operating Shock: 30 g.

• Non-Operating Shock: 50 g (45 g with SD card installed).

Installation Guide for the 1756-L73

Follow these steps for a proper installation of the 1756-L73.

Step 1: Chassis Selection and Preparation
Firstly, select a compatible 1756 ControlLogix chassis for the 1756-L73. The processor can be installed in any slot of the chassis. Then, ensure the chassis is mounted securely and properly grounded.

Step 2: Power Supply Installation
After that, install a compatible power supply in the leftmost slot of the chassis. The 1756-L73 requires a standard or redundant ControlLogix power supply. Select from the 1756-PA, 1756-PB, or 1756-PH series based on your voltage requirements.

Step 3: Processor Installation
Then, insert the 1756-L73 into the desired slot of the 1756 chassis. Align the module with the card guides on the top and bottom. Push firmly until the module seats completely in the backplane connector. Secure the processor using the retaining screws.

Step 4: USB Connection for Programming
Furthermore, connect a USB cable from the 1756-L73 USB 2.0 port to your programming workstation. The USB port supports up to 12 Mbps for fast program downloads and uploads. Alternatively, connect via Ethernet/IP for network-based programming.

Step 5: I/O Module Installation and Configuration
Finally, install I/O modules in the remaining chassis slots as required. Apply power to the 1756-L73 and the ControlLogix system. Configure the processor using RSLogix 5000 or Studio 5000 software. Download your control program into the 8 MB user memory. Verify that the system operates as expected.

Packaging List for the 1756-L73

• 1756-L73 ControlLogix Logix5673 Processor (1 unit)

• Product documentation and installation guide (1 copy)

Note: Energy storage module is integrated. No battery is required or included.

Frequently Asked Questions (FAQs) About the 1756-L73

Q1: How much user memory does the 1756-L73 have?

The 1756-L73 has 8 MB of user memory for program and data storage. In addition, it has 0.98 MB of dedicated I/O memory. Therefore, this processor handles large, complex control applications without memory constraints.

Q2: Does the 1756-L73 require a battery for memory backup?

No, it does not. The 1756-L73 features energy storage technology that eliminates the need for a battery. This technology retains volatile memory contents during power loss. Therefore, battery replacement maintenance is completely eliminated.

Q3: How many I/O points can the 1756-L73 support?

The 1756-L73 supports up to 128,000 total I/O points. This includes 128,000 digital I/O and 4,000 analog I/O channels. Consequently, this processor controls very large automation systems from a single controller.

Q4: What programming languages does the 1756-L73 support?

The 1756-L73 supports four IEC 61131-3 programming languages. These are relay ladder logic, structured text, function block diagram, and sequential function chart. Therefore, you can choose the best language for each specific control task.

Q5: Can the 1756-L73 be used in a redundant configuration?

Yes, it can. The 1756-L73 supports both simplex and high-availability redundant configurations. Redundant configurations require compatible redundant power supplies. Therefore, this processor provides increased system availability for critical processes.