Burkert 8681, Руководство по эксплуатации

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IO-Link - Design
14.5.3 Design aid
The values were determined for the design voltage of 24 V DC. The different power supply of the system
and actuators (solenoid valves) for port class A and B (see “Fig. 37”) must be taken into consideration when
designing the voltage sources.
Power/current consumption for port class A:
Power consumption of the electronics:
P
el
= 1.0 W or I
el
= 42 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
Power consumption of an optical position feedback:
P
LED
= 0.5 W or I
LED
= 21 mA at 24 V
Calculation examples (for port class A):
Example 1:
3 valves are activated, one position is reported (status for 200 ms): the control head switches automatically one
valve after another to keep the current consumption low - i.e.: max. current consumption I
Total l, max.
= current con -
sumption of 2 valves (already activated) + 1 valve (just switching)
P
Total
= P
el
+ 2 x P
valve
+ 1 x P
valve ON
+ 1 x P
LED
3.6 W = 1.0 W + 2 x 0.6 W + 1 x 0.9 W + 1 x 0.5 W
or
I
Total
@ 24 V = I
el
+ 2 x I
valve
+ 1 x I
valve ON
+ 1 x I
LED
151 mA = 42 mA + 2 x 25 mA + 1 x 38 mA + 1 x 21 mA
Example 2:
3 valves have been activated, one position is reported (persistent state):
P
Total
= P
el
+ 3 x P
valve
+ 1 x P
LED
3.3 W = 1.0 W + 3 x 0.6 W + 1 x 0.5 W
or
I
Total
@ 24 V = I
el
+ 3 x I
valve
+ 1 x I
LED
138 mA = 42 mA + 3 x 25 mA + 1 x 21 mA
When using an external proximity switch, its power requirement should be added.
english
Control Head Type 8681