EVS XT[2] - 2.7 AUDIO CONFIGURATIONS; 2.7.1 CODA FOR XT[2]; 2.7.2 PIN ASSIGNMENT ON SUB-DB15 CONNECTORS

Issue
10.03.B
XT Series DISK RECORDER
–
Version 10.03 - Hardware Technical Reference
EVS Broadcast Equipment SA
–
July 2010
28
2.5.2 GPIO HARDWARE SPECIFICATION
4 X Relay Isolated Output:
•
normally open contact (power off -> open)
• maximum 1A
• maximum 50 Volts
• typical life time: 100.000.000 switching
4 X Opto Isolated Input:
•
The input consists in an opto diode (VF @ 1.1 Volt) in series with a 470 ohm
resistor).
• Typical switching point @ 1.4 mA, for secure operation:
o i=0 to 0.5 mA -> opto OFF
o i=2.5 to 30 mA -> opto ON
o 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:
o Vin< 0.8 Volts -> opto OFF
o Vin> 2.2 Volts @ 2 mA -> opto ON
o 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)
• optional TTL compatible level (U12=74HCT245)