Design Aid - Burkert 8681 Operating Instructions Manual

Control Head Type 8681
DeviceNet-Design
12.6.

Design aid

Power consumption of the electronics:
P = 1.44 W
El
Power consumption of a valve during activation (200 ms):
P = 1.0 W
Valve-ON
Power consumption of a valve after reduction:
P = 0.6 W
Valve
Power consumption of an optical position report:
P = 1.0 W
LED
Calculation examples:
Example 1:
3 valves are activated simultaneously, one position is reported (state for 200 ms):
P = P
Total El
5.44 W = 1.44 W
or
I = I
Total El
228 mA = 60 mA
Example 2:
3 valves have been activated simultaneously, one position is reported (persistent state):
P = P
Total El
4.24 W = 1.44 W
or
I = I
Total El
177 mA = 60 mA
When using an external initiator, its power requirement should be added.
or
or
or
or
+ 3 x P + 1 x P
Valve-ON
+ 3 x 1.0 W + 1 x 1.0 W
+ 3 x I + 1 x I
Valve-ON LED
+ 3 x 42 mA + 1 x 42 mA
+ 3 x P + 1 x P
Valve
+ 3 x 0.6 W + 1 x 1.0 W
+ 3 x I + 1 x I
Valve LED
+ 3 x 25 mA + 1 x 42 mA
I = 60 mA at 24 V
El
I = 42 mA at 24 V
Valve-ON
I = 25 mA at 24 V
Valve
I = 42 mA at 24 V
LED
LED
LED
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