Leuze electronic MSI 200 Series User Manual page 122

Leuze electronic
A 1.2 Power loss for MSI-EM200-8I4IO
Power loss of the logic
– for U = U
S(24V/0V) S(A1/A2)
= P + P = 450 mW + 77 mW = 617 mW
P
24V/0V A1/A2
Logic
Power loss per connected input
– for U = 24 V DC
S(A1/A2)
= 134 mW
P
Input
Power loss per clock / signal output
– for U = 24 V DC
S(24V/0V)
= I ² * 350 mΩ
P
Clock
Clock
Power loss per output Out / GND
– for U = 24 V DC
S(A1/A2)
= I ² * 96 mΩ + 134 mW
P
Out/GND
Out/GND
Total power loss
= P + f * P + g * P
P
Logic Input
Total
i.e.
= 617 mW + f * 134 mW + g * I
P
Total
+ h * (I ² * 96 mΩ + 134 mW)
Out/GND
Legend:
Power loss in mW
P
Rated control circuit supply voltage 
U
S
assigned to the connections
Current drawn at a clock output
I
Clock
Current drawn from an output with 
I
Out/GND
GND reference point
Number of used inputs
f
Number of used clock/signal outputs
g
Number of used outputs with GND reference point
h
= 24 V DC (via MSI-TBUS)
+ h * P
Clock Out/GND
² * 350 mΩ 
Clock
MSI 100/200
Calculation of the power loss
122