HIMA products give you maximum, long-term plant availability. To ensure this, we continually

modernize our product portfolio with new technologies. Compatible successor products ensure

your safety system continues to operate smoothly many years after installation. This reduces life

cycle costs, avoids unplanned downtime, and ensures investment protection for your assets.

HIQuad H41q/H51q was introduced to the market in 1997 as the third generation of central modules

for certified programmable safety systems. In 2018. the fourth generation of central modules was

introduced to ensure the sustainability of the HIQuad system family. The new central modules support

a wide variety of I/O modules from the previous generation. The combination of the reliable HIQuad I/O

modules and the new central modules is named HIQuad X. This guarantees maximum compatibility

for field installations and minimum modernization efforts.