Phoenix Contact TRIO-PS/1AC/24DC/10 Redundant Power Supply

The Phoenix Contact TRIO-PS/1AC/24DC/10 is a 240 W single-phase DIN-rail power supply providing regulated 24 V DC at 10 A continuous, with integrated 1+1 hot-plug redundancy and IEC 62061 SIL 2 certification — capabilities that distinguish it from the QUINT-PS and place it at the highest tier of safety-system 24 V DC power supply technology in Saudi Arabia's oil, gas, and petrochemical sector. The TRIO-PS operates in a 1+1 parallel configuration with a second TRIO-PS unit: both units share the 24 V DC load equally with automatic load-sharing, and when one unit fails, the remaining unit picks up the full load without any interruption to the connected instruments — the switchover is bumpless and requires no logic or relay, because the TRIO-PS architecture achieves redundancy through passive diode sharing rather than through active switching. The hot-plug capability means a failed TRIO-PS can be replaced in a live panel without de-energising the 24 V DC bus, a critical maintenance advantage on Saudi Aramco process units where planned shutdowns occur only once every 3–5 years and the safety system must remain energised continuously.

The SIL 2 certification to IEC 62061 (Safety of machinery — Functional safety) is the key differentiator for TRIO-PS in Saudi Aramco SIS (Safety Instrumented System) panel applications. Saudi Aramco's process safety engineering standard SAES-Z-010 (Safety Instrumented Systems) requires that SIS power supplies achieve SIL 2 at the subsystem level as part of the overall SIS SIL 2 functional safety assessment. A conventional power supply without SIL 2 certification requires a dedicated SIL analysis to determine its contribution to the SIS failure rate — an engineering effort that consumes significant project hours and may result in the supply being deemed unsuitable. The TRIO-PS SIL 2 certificate (TÜV Rheinland) eliminates this analysis step and provides direct compliance documentation for ARAMCO SIS panel approval submissions.

The TRIO-PS 10A is specified on all ARAMCO SIS, F&G, and ESD marshalling panels where the instrument loop power supply must be SIL 2 rated — which in practice means every safety system marshalling panel in ARAMCO's Eastern Province and offshore operations. SABIC's operating companies require SIL 2 certified power supplies for their process-area SIS panels per SABIC's internal functional safety standard, which references IEC 61511 and IEC 62061. The NEOM OXAGON industrial port process safety system panels — which must comply with IEC 61511 as part of the HAZOP and LOPA process — specify SIL 2 certified 24 V DC power supplies, a requirement directly met by the TRIO-PS 10A. Saudi Aramco's HAZOP and safety studies for new GOSP, gas-compression, and LNG facilities conducted by Process Safety Management (PSM) consultants consistently identify SIS power supply as a SIL 2 requirement, making the TRIO-PS 10A the default selection.

Razz Middle East maintains TRIO-PS 10A and 20A stock in both Riyadh and Jeddah, and provides complete TRIO-PS application packages for ARAMCO SIS panels: SIL 2 certificate in Arabic translation for ARAMCO HSE submission, TRIO-PS integration into ARAMCO SAES-Z-010 SIS panel design documentation, hot-plug replacement procedure document for ARAMCO Inspection approval, and load-sharing balance verification test report. All TRIO-PS/1AC/24DC/10 supplies carry Phoenix Contact CE declarations, IEC 61558-2-16 certificates, TÜV SIL 2 certificates, and SASO import conformity documentation.