Allen-Bradley 1756-L74 ControlLogix Processor

Series#: AllenBradley

Product Details

1756-L74 Allen-Bradley ControlLogix 5564 Controller – High-performance industrial automation CPU.
Supports up to 4 remote I/O chassis via ControlNet, EtherNet/IP, or DH+ networks.
Equipped with 4 MB battery-backed RAM for large-scale logic and data storage.
Integrated RS-232/422/485 serial port for local programming and HMI connectivity.
Rack-mounted in 1756 chassis – ideal for mid-to-large process and discrete control.
Hot-swappable design with redundant power and communication module support.
100% Original product. We provide efficient, traceable, and secure global shipping solutions.

Specification

The Allen-Bradley 1756-L74 ControlLogix 5564 controller is a rugged, high-speed processor designed for demanding industrial automation environments. With a 32-bit backplane interface and a 4 MB memory capacity, this CPU excels in handling complex logic, motion, and process control tasks. The 1756-L74 supports a wide range of communication protocols including ControlNet, EtherNet/IP, and DeviceNet, making it a versatile backbone for distributed control systems. Its modular architecture allows easy integration with I/O modules, drives, and third-party devices, ensuring seamless scalability from small standalone machines to large plant-wide networks.

Parameter	Specification
Product Type	ControlLogix 5564 Controller
Catalog Number	1756-L74
Processor Speed	1.2 GHz (32-bit RISC)
Memory (User Program + Data)	4 MB battery-backed RAM
Non-Volatile Memory	4 MB Flash (for firmware and backup)
Maximum I/O Points	128,000 digital / 4,000 analog (distributed)
Backplane Current	1.5 A Standard Models 5.1 V DC
Communication Ports	1 x RS-232/422/485 serial (DF1, DH-485, Modbus)
Network Support	ControlNet, EtherNet/IP, DeviceNet (via modules)
Chassis Slot	1756 series (single-slot)
Power Supply	1756-PA72 / 1756-PB72 (AC/DC models)
Operating Temperature	0°C to 60°C (32°F to 140°F)
Storage Temperature	-40°C to 85°C (-40°F to 185°F)
Humidity	5% to 95% non-condensing
Shock	30 g operational, 50 g non-operational
Vibration	2 g Standard Models 10–500 Hz
Certifications	UL 508, CSA C22.2 No. 142, CE, ATEX Zone 2 (with enclosure)
Weight	Approx. 0.45 kg (1.0 lb)
Dimensions (H x W x D)	14.2 cm x 5.1 cm x 14.5 cm (5.6 in x 2.0 in x 5.7 in)

Note: The 1756-L74 is fully compatible with all 1756-series I/O modules, communication modules, and power supplies. It supports redundant media for ControlNet and EtherNet/IP networks. For high-availability applications, pair with 1756-RM2 redundancy modules.