User manual

Specifications
each pin can be individually configured as an output or an input
internal 4K7 pull up to +5V
low level Vi<1.5 Volt (U12=74HC245)
high level Vi>3.5 Volt (U12=74HC245)
optional TTL compatible level (U12=74HCT245)
76 5. Hardware Installation and Cabling
EVS Broadcast Equipment SA Issue 12.05.B- July 2014