EVS XT Series - External Control Protocols

XT Series DISK RECORDER - Technical Reference
EVS Broadcast Equipment SA - Nov 2005
Issue 3.0
19
i=0 to 0.5 mA -> opto OFF
i=2.5 to 30 mA -> opto ON
imax= 30 mA
• Direct connection to a TTL/CMOS signal possible (Pin opto - to
GND and pin opto + to the TTL/CMOS signal.
Typical switching point @ 1.6 Volts, for secure operation:
Vin< 0.8 Volts -> opto OFF
Vin> 2.2 Volts @ 2 mA -> opto ON
Vin max (without external resistor) = 15 Volts
4 X CMOS input/output:
• each pin can be individually configured as an output or an input.
• internal 4K7 pull up to +5V.
• low level Vi<1.5 Volt (U12=74HC245)
• high level Vi>3.5 Volt (U12=74HC245)
• optionnal TTL compatible level (U12=74HCT245)