Burkert 8681 - Page 81

81
IO-Link - Design
Power/current consumption for port class B:
Power 1:
Electronicssupply(1)+displayLED
Power 2: Electronicssupply(2)+actuators(solenoidvalvesinthecontrolhead)
Power 1: Power consumption of the electronics (1):
P
el 1
=1.0W or I
el 1
=42mA at 24 V
Power consumption of an optical position feedback:
P
LED
=0.5W or I
LED
=21mA at 24 V
Power 2: Power consumption of the electronics (2):
P
el 2
=0.22W or I
el 2
=9mA at 24 V
Power consumption of a valve during activation (200 ms):
P
valve ON
=0.9W or I
valve ON
=38mA at 24 V
Power consumption of a valve after reduction:
P
valve
=0.6W or I
valve
=25mA at 24 V
Calculation examples (for port class B):
Example 1:
3valvesareactivated,onepositionisreported(statusfor200ms):thecontrolheadautomatically
switches one valve after another to keep current consumption low, i.e for
Power 1: max. current consumption I
Power 1
=currentconsumptionofelectronics(1)+displayLED
Power 2: max. current consumption I
Power 2
=currentconsumptionofelectronics(2)+of2valves(already
turnedon)
+1valve(currentlyswitching)
P
Power 1
=P
el 1
+ 1 x P
LED
P
Power 2
=P
el 2
+ 2 x P
valve
+ 1 x P
valve ON
1.5 W =1.0W + 1 x 0.5 W 2.3 W =0.22W + 2 x 0.6 W + 1 x 0.9 W
or
I
Power 1
@ 24 V =I
el 1
+ 1 x I
LED
I
Power 2
@ 24 V =I
el 2
+ 2 x I
valve
+ 1 x I
valve ON
63 mA =42mA + 1 x 21 mA 97 mA =9mA + 2 x 25 mA + 1 x 38 mA
Example 2:
3valveshavebeenactivated,onepositionisreported(persistentstate):
P
Power 1
=P
el 1
+ 1 x P
LED
P
Power 2
=P
el 2
+ 3 x P
valve
1.5 W =1.0W + 1 x 0.5 W 2.02 W =0.22W + 3 x 0.6 W
or
I
Power 1
@ 24 V =I
el 1
+ 1 x I
LED
I
Power 2
@ 24 V =I
el 2
+ 3 x I
valve
63 mA =42mA + 1 x 21 mA 84 mA =9mA + 3 x 25 mA
Whenusinganexternalproximityswitch,itspowerrequirementshouldbeadded.
english
Control Head Type 8681