F3423 Relay Module: Making SIL 3 Happen in a Millisecond “Click”
Oct 18, 2025
1.The last two metres of a safety loop Every SIS terminates at a valve, motor or horn. Between the CPU and the field device are only two metres of copper—and a relay. If the relay hesitates, the highest SIL 3 logic is worthless. The HIMA F3423 was created to eliminate those two metres of uncertainty. 2.One-sentence summary 8 NO contacts, galvanically isolated, 24 V DC ↔ 230 V AC, 2 A per channel, ...
