PT-IQ Intelligent MCR Surge Protection Devices Phoenix Contact PT-IQ Intelligent MCR Surge Protection Devices are engineered with multi-stage remote monitoring and status reporting capability with reliable T-Bus connection. With new design features and proactive functional monitoring, PT-IQ stands out as a unique, intelligent MCR surge protection device. It prevents unnecessary maintenance by providing alerts so that the user knows when to replace plugs before they reach their performance limit. Phoenix Contact PT-IQ ensures system availability with excellent signal quality.