Triconex 8120E Enhanced Performance Main Chassis

Configured for high-integrity Safety Instrumented Systems (SIS), the Triconex 8120E (8120E Enhanced Performance Main Chassis) provides direct physical/electrical execution. The 19-slot chassis hardware houses three main processors and integrated I/O modules, maintaining continuous diagnostic coverage across emergency shutdown (ESD) and critical safety loops.

Hardware Specifications

SIL3 Certification & Triple Modular Redundancy (TMR) Architecture

The 8120E chassis provides the hardware foundation for SIL3-certified triple modular redundancy (TMR) applications. Three isolated power, logic, and bus channels run concurrently across the backplane, allowing the host system to execute 2oo3 (two-out-of-three) voting logic on all input signals and internal diagnostic states. Internal galvanic isolation barriers separate the field power lines from central processing buses, ensuring that single-point electrical faults or channel failures trigger immediate fail-safe state execution without causing system-wide shutdown.

Frequently Asked Questions

Q: How does the 8120E chassis backplane maintain fault isolation during module failure?

A: The backplane features three completely separated signal and power distribution channels. Galvanic isolation and fault-tolerant TriBus architecture prevent an electrical short or hardware failure on one channel from propagating to the remaining two active channels.

Q: Can modules installed in the 8120E chassis be replaced while power is applied?

A: Yes, the chassis supports full hot-swap capability for main processors, communication modules, and I/O cards, allowing online module replacement without de-energizing the safety system or disrupting active 2oo3 voting loops.

Field Installation Guidelines

• Mount the 8120E chassis securely into a standard 19-inch industrial rack enclosure, ensuring proper structural support for its 24.5 kg frame weight.

• Connect dual redundant 24 VDC or 100-240 VAC power feeds to the chassis power terminal connections to maintain continuous power path fault tolerance.

• Maintain adequate vertical ventilation space inside the cabinet to facilitate natural convection heat dissipation across installed modules.

• Bond the chassis ground lug directly to the central functional earth bar with a low-impedance copper conductor to prevent electromagnetic noise coupling onto backplane bus lines.