Burkert Type 8681 - Manual (Page 43)

43
AS Interface - Design
Calculation examples:
example 1:
3 valves are activated simultaneously, one position is reported (state for 200 ms):
P
Slave
= P
El
+ 1 x P
Valve-On
+ 2 x P
Valve
+ 1 x P
LED
4.5 W = 1.0 W + 1 x 0.9 W + 2 x 0.8 W + 1 x 1.0 W
or
I
Slave
= I
El
+ 1 x I
Valve-On
+ 2 x I
Valve
+ 1 x I
LED
148 mA = 33 mA + 1 x 30 mA + 2 x 26 mA + 1 x 33 mA
example 2:
3 valves have been activated simultaneously, one position is reported (persistent state):
P
Slave
= P
El
+ 3 x P
Valve
+ 1 x P
LED
4.4 W = 1.0 W + 3 x 0.8 W + 1 x 1.0 W
or
I
Slave
= I
El
+ 3 x I
Valve
+ 1 x I
LED
144 mA = 33 mA + 3 x 26 mA + 1 x 33 mA
When using an external initiator, its power requirement should be added.
safety instructions 11.6.
Danger!
danger of explosion in explosive atmosphere (only in the event of a fault as zone 2)!
Opening the hood or the housing in an explosive atmosphere is only allowed in the isolated state! •
Warning!
risk of injury due to electrical shock!
Before reaching into the system (except for the Teach-In procedure in a non-explosive atmosphere) switch off •
the power supply and secure it to prevent restarting!
Observe applicable accident prevention and safety regulations for electrical equipment! •
risk of injury from improper installation!
Installation may be carried out by authorized technicians only and with the appropriate tools! •
risk of injury from unintentional activation of the system and an uncontrolled restart!
Secure system from unintentional activation. •
Following installation, ensure a controlled restart. •
english
Control Head Type 8681