Allen Bradley 1756-L74 ControlLogix 5574 Processor

The AB 1756-L74 is a high-performance ControlLogix processor module engineered for demanding automation applications. With a massive 16 MB user memory, this modular PAC enables large-scale control and complex logic routines with real-time precision.

Equipped with a USB programming port and built-in support for EtherNet/IP and Modbus protocols, the 1756-L74 is ideal for use in redundant, safety-rated, and high-availability environments. Designed for integration into ControlLogix chassis systems, it provides reliable operation, seamless expansion, and broad protocol compatibility.

Technical Specifications

Model: 1756L74
Series: ControlLogix 5570
Controller Type: Programmable Automation Controller (PAC)
Memory Size: 16 MB
Form Factor: Modular
Mounting Type: Rack-mounted
Application: High-end automation, motion, process control, safety

Electrical Specifications

Input Voltage: Supplied via backplane
Power Consumption: Provided by chassis power supply
Communication Ports: 1 × USB
Network Support: EtherNet/IP (via communication module)
Isolation: Optical isolation between logic and I/O
Real-Time Clock: Integrated

Communication & Protocols

USB Port: Yes (1×)
EtherNet/IP Support: Yes (via separate 1756-ENx module)
MODBUS Support: Yes (via bridge or interface module)
RS-232 Support: No
SERCOS Support: No
Data Highway Support: No
TCP/IP Support: No (direct)
Communication Options: Expansion via 1756 communication modules

Mechanical Specifications

Width: 292 mm
Height: 240 mm
Depth: 164.52 mm
Mounting: Chassis-based (ControlLogix backplane)
Display: Integrated alpha-numeric display
Cooling: Forced air (via chassis fan)

Environmental Specifications

Operating Temperature: 0°C to 60°C
Storage Temperature: –40°C to 85°C
Humidity: 5% to 95% RH (non-condensing)
Vibration Resistance: IEC 60068-2-6 compliant
Shock Resistance: IEC 60068-2-27 compliant
IP Rating: Enclosed system dependent

Compliance & Certifications

CE Marked: Yes
UL / cUL Listed: Yes
RoHS Compliant: Yes
SIL Rating (IEC 61508): SIL 3
Performance Level (EN ISO 13849-1): Level e
EN 954-1 Category: 4

Key Features & Benefits

✅ 16 MB User Memory: Supports large, complex logic programs and motion sequences

✅ Modular Design: Fits seamlessly into ControlLogix chassis for scalable control

✅ USB Programming Port: Enables convenient local configuration and monitoring

✅ High Integrity Compliance: Meets SIL 3 and PLe standards for safety applications

✅ Flexible Networking: Compatible with EtherNet/IP and Modbus via communication modules

📦 Order the Allen Bradley 1756-L74 from Drive Outlet Megastore

At Drive Outlet Megastore, we offer unbeatable Allen Bradley 1756-L74 prices. Ideal for scalable, high-performance control environments, this controller is trusted across industries for its reliability, capacity, and modular expandability.

Check stock now or request a quote

Memory-packed. Safety-rated. Logix-powered. — Drive Outlet Megastore