ABB PM857K02 Redundant Safety PLC Kit Controller

ABB PM857K02 Redundant Safety Controller Kit

The 3BSE088386R1 (PM857K02) is a complete ABB AC 800M High Integrity redundant controller kit. This package includes two PM857K01 safety processor units and necessary cables to establish a fully redundant system. It is engineered for critical applications demanding maximum availability and functional safety up to SIL 3.

Core Technical Specifications

• Brand & Model: ABB PM857K02 (Article: 3BSE088386R1)
• Package Contents: 2x PM857K01 CPUs, 1x TK850 CEX-bus cable, 1x TK851 RCU-Link cable.
• Redundancy: Yes, configured for CPU redundancy with <10 ms switchover time.
• Safety Certification: Up to SIL 3 with SM812 module; TÜV certified.
• CPU Specs: MPC866 @ 96 MHz, 32 MB RAM (22 MB for application).
• I/O Capacity: Max 128 signals; supports S800 I/O High Integrity.
• Communication: 2x Ethernet, 2x RS-232C ports per controller.
• Power Supply: 24 V DC (19.2-30V).

Physical Data, Features & Certifications

• Weight: 2700 grams (approximately 5.95 lbs) for the complete kit.
• Dimensions per Unit: 119 mm x 186 mm x 135 mm (W x H x D).
• Key Feature: Combines standard process control and SIL 3 safety logic in one platform.
• Configuration: Requires ABB 800xA Control Builder.
• Certifications: CE, cULus (Class 1, Zone 2), TÜV, ISA Secure, RoHS, marine (ABS, BV, DNV-GL).
• Operating Temperature: +5°C to +55°C.

Frequently Asked Questions

• Q: What is included in this kit versus buying a single PM857?
  A> This PM857K02 kit includes two controller units and the essential cables to connect them for a redundant pair, providing a ready-to-deploy high-availability solution.
• Q: Is the SM812 safety module included?
  A> No. The SM812 module is required to achieve SIL 2/3 functionality and must be purchased separately.
• Q: What is the main benefit of redundancy?
  A> It ensures continuous operation; if the primary CPU fails, the backup takes over within milliseconds, preventing process downtime.