1769-L33ERMS Allen-Bradley Safety CPU

1769-L33ERMS Allen-Bradley Safety CPU | New & Original Stock

Availability: 99 left in stock

Allen-Bradley 1769-L33ERMS Compact GuardLogix 5370 L3 Controller The Allen-Bradley 1769-L33ERMS, also cataloged as the 1769-L33ERM Integrated Safety, Motion, and Standard...

SKU: 1769-L33ERMS

Manufacturer: Allen Bradley
Product No.: 1769-L33ERMS
Product Type: CPU Processors
Product Origin: USA
Payment:T/T, Western Union
Weight: 400g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Allen-Bradley 1769-L33ERMS Compact GuardLogix 5370 L3 Controller

The Allen-Bradley 1769-L33ERMS, also cataloged as the 1769-L33ERM Integrated Safety, Motion, and Standard Logic Controller, operates as a dedicated hardware component for unified functional safety and multi-axis kinematics execution within EtherNet/IP deterministic networks.

Hardware Specifications

Parameter	Specification
Model	1769-L33ERMS
Brand	Allen-Bradley / Rockwell Automation
Origin	USA
Weight	0.40 kg
Dimensions	132 x 89 x 114 mm
Operating Temp	0 to 60 deg C
Power Consumption	8.2 W (560 mA @ 5 V DC, 225 mA @ 24 V DC)
User Memory	2 MB standard logic allocation / 1 MB safety allocation
Integrated Motion	8 axes of CIP Motion on EtherNet/IP
Safety Compliance	SIL 3 (IEC 61508) and PLe (ISO 13849-1)
Local I/O Expansion	16 modules maximum (1769 Compact I/O)
Power Supply Distance	4 modules maximum distance rating
Communication Ports	2 x RJ45 EtherNet/IP nodes, 1 x USB 1.1 programming port

EtherNet/IP Deterministic Networks and Firmware Flash Compatibility

The hardware contains dual integrated RJ45 ports that manage up to 32 EtherNet/IP nodes and 8 axes of synchronized CIP motion loops. To achieve safe-speed performance limits, the controller utilizes Device Level Ring (DLR) topologies to secure deterministic data throughput during link disruptions. The main processor core and the secondary internal safety supervisor operate with strict firmware flash compatibility verification, matching the execution clocks of standard logic modules to the functional safety partition. This interlocking synchronization eliminates the need for an external safety partner module while sustaining real-time processing schedules across the local I/O chassis.

Frequently Asked Questions

Q: How does the power supply distance rating affect the structural layout of the 1769 Compact I/O expansion modules?

A: The 1769-L33ERMS possesses a strict power supply distance rating of 4 modules. This means no local I/O module can be located more than 4 slots away from the chassis power supply to ensure adequate backplane voltage stability for the safety logic.

Q: What are the parameters regarding hot-swap capability for this controller unit?

A: The 1769-L33ERMS does not support Removal and Insertion Under Power (RIUP). Any attempt to decouple the controller from the 1769 bus or to disconnect its power supply while energized will break the safety loop and trip all downstream actuators into a safe state.

Field Installation Guidelines

Secure the module onto a standard 35 mm DIN rail or mount it directly to the enclosure panel using the designated integrated mounting tabs.
Verify that the manual hardware mode switch is set to the correct operating state before completing the final commissioning step.
Insert the 1784-SD1 non-volatile memory card fully into the designated slot prior to flashing any system firmware revisions.
Maintain the strict 4-module maximum distance limit between the controller module and the system power supply unit.
Ground the DIN rail or backplane assembly to the main copper enclosure ground bar using low-impedance grounding conductors to prevent electromagnetic interference.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.