1. Max 64 modules per 16 channels & LED 2. High speed 12M back plate bus& 64 digital quantity modules, 2ms refreshing period & analog quantity is 3.4ms; 3.Supports 1024 I/O points and hot plug; 4. Up to 20 meters extension cable; 4. WTP is from -30~75℃ & 2 years warranty ; 6.Supports 12 main stream protocolS in the market.