Studer Vista 1 - Page 50

Vista 1 Digital Mixing System
2-10 Desk Operation
Document generated: 18.04.17
SW V5.3
GPIO Inputs The control inputs (GPI Xa/b) are completely independent and electrically
isolated. They may be used either with the internal +5 V DC supply voltage,
or with external voltages of 5...24 V DC, regardless of the polarity.
i
LED
Ext. Supply
5...24 VDC
Negative Common, Ext. Supply Negative Common, Int. Supply Positive Common, Ext. Supply Positive Common, Int. Supply
Ext. GND
Desk
i
LED
Int. Supply (VCC)
Desk
Ext. GND
i
LED
Ext. Supply
5...24 VDC
Desk
Int. GND
Int. GND
i
LED
Int. Supply (VCC)
Desk
GPI 1-8 (25-pin D-type, female, UNC 4-40 thread)
Solder/Crimp View
(or Socket View)
1
1425
13
Pin Signal ‘GPI 1-8’ Pin Signal ‘GPI 1-8’
1 GPI 1a 14 GPI 1b
2 GPI 2a 15 GPI 2b
3 GPI 3a 16 GPI 3b
4 GPI 4a 17 GPI 4b
5 GPI 5a 18 GPI 5b
6 GPI 6a 19 GPI 6b
7 GPI 7a 20 GPI 7b
8 GPI 8a 21 GPI 8b
9-13 GND (0 V) 22-25 VCC (+5 V / 600 mA max.)
GPIO Outputs The control outputs (GPO Xa/b) are completely independent and electri-
cally isolated relay contacts, closed if active. They may be used either with
the internal +5 V DC supply voltage (VCC) and the internal ground, or with
external voltages within the limits given in the table below. So when using
an external supply, it is irrelevant wheter the load is connected between + or
GND and one of the relay contacts, regardless of the polarity of the external
supply voltage.
Ext. Supply Int. Supply
Ext. GND
Desk
Ext.
Supply
Load
(Lamp)
Int. GND
Desk
Int. Supply (VCC)
Load
(Lamp)
Contact Rating (max. Values)
Switching Power 62.5 VA / 30 W
Switching Voltage 50 V AC or DC
Switching Current 1 A
Contact Resistance
max. 100 mW at 6 V DC / 1 A
The +5 V DC supply voltage and the ground (GND) terminals, together with
the relay contacts, may be used to generate an output signal. Using an external
supply together with the relay contacts is possible as well.
!
The total current supplied by all VCC (+5 V DC) pins of the GPI / GPO con-
nectors must not exceed 400 mA.