Burkert 8681 - AS Interface Safety Instructions

58
AS Interface - Design
Calculation examples:
Example 1:
3valvesareactivated“simultaneously”,onepositionisreported(statusfor200ms):
P
Slave
= P
El
+ 1 x P
Valve-ON
+ 2 x P
Valve
+ 1 x P
LED
4.1W= 1.0 W + 1 x 0.9 W + 2 x 0.6 W + 1 x 1.0 W
or
I
Slave
= I
El
+ 1 x I
Valve-ON
+ 2 x I
Valve
+ 1 x I
LED
136mA= 33 mA + 1 x 30 mA + 2 x 20 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
3.8W= 1.0 W + 3 x 0.6 W + 1 x 1.0 W
or
I
Slave
= I
El
+ 3 x I
Valve
+ 1 x I
LED
126mA= 33 mA + 3 x 20 mA + 1 x 33 mA
Whenusinganexternalinitiator,itspowerrequirementshouldbeadded.
12.7 Safety instructions
DANGER!
Danger of explosion in a potentially explosive atmosphere (only in the event of a fault as zone 2)!
` Opening the hood or the housing in a potentially explosive atmosphere is only allowed in a not ener-
gised state!
WARNING!
Risk of injury due to electric shock!
` Beforereachingintothesystem(exceptfortheTeachprocedureinanon-explosiveatmosphere)switch
o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 trained technicians only and with the appropriate tools!
Risk of injury from unintentional activation of the system and uncontrolled restart!
` Secure system against unintentional activation.
` Following installation, ensure a controlled restart.
english
Control Head Type 8681