7-3Operating Manual: PSS(1) DI2O Z
Power dissipation
P = P
G
+ n
O2
*
P
O2
+ n
O1
*
P
O1
+ n
I1
*
P
I1
•P
G
: Basic power dissipation
•P
O2
:Power dissipation on one output at a “1” signal, without load
•P
O1
:Power dissipation on one output at a “1” signal, under load
•P
I1
: Power dissipation on one input at a “1” signal
•n
O2
:Number of outputs at which a “1” signal may be present
simultaneously, without load
•n
O1
:Number of outputs at which a “1” signal may be present
simultaneously, under load
•n
I1
: Number of inputs at which a “1” signal may be present
simultaneously
Relationship between power dissipation and supply voltage:
P
G
P
O2
P
O1
P
I1
20 V
3.6 W
0.1 W
200 mOhm
*
I
Load
0.1 W
24 V
3.8 W
0.3 W
200 mOhm
*
I
Load
0.14 W
30 V
4.4 W
0.4 W
200 mOhm
*
I
Load
0.28 W
Supply voltage in V