Burkert 8681 - Page 56

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AS Interface - Design
Connections:
Multi-pole connection version: 1 x M16 x 1.5 cable gland / size19 with multi-pole connection
(M12plugaccordingtoIEC61076-2-101,4-pole)forpowersupply
and signals, cable length approx. 15 cm or approx. 80 cm
1 x M16 x 1.5 cable gland/size19 - connection option for external
initiator(sealedwithdummyplug,removethesebeforeuse)
Power supply:     29.5...31.6VDC(accordingtospecication)
21.0...31.6VDC(accordingtospecicationPower24)
Input / proximity switches (external initiator: S4 in):
Power supply: AS interface voltage present at control head - 10%
Current carrying capacity,
sensor power supply: max. 30 mA
Short-circuit protection
design: DC 2- and 3-conductor,
         NOorNC(factorysettingNO),PNPoutput
Input current 1 signal: ISensor > 6.5 mA, limited internally to 10 mA
Input voltage 1 signal: USensor > 10 V
Inputcurrent0signal:    ISensor<4mA
Inputvoltage0signal:    USensor<5V
Inputs (from master perspective) / binary feedback signals:
The recovery of the 3 valve positions reported back in binary format is described in chapter “20”onpage
129.
Outputs (from master perspective) / solenoid valves:
  Typ.switchingcapacity:    0.9W(persolenoidvalve,for200msafterswitchingon)
Typ.continuousoutput:    0.6W(persolenoidvalve,from200msafterswitchingon)
Watchdog function: integrated
Output reduction: via AS interface - electronics integrated
  Typ.Pull-incurrent(persol.valve):30mAor0.9W/200ms(at30.5VAS-ivoltage)
Typ.Holdingcurrent(persol.valve): 20mAor0.6W  (at30.5VAS-ivoltage)
Operatingmode:    Long-termoperation(100%ED)
Valve type: Type 6524
Central display of the switching statuses:
Power consumption from AS interface
at 30.5 V AS interface voltage: approx. 33 mA or 1 W per illuminated display
Number of representable colours: 2 colours for process valve switching statuses
1 colour for signaling a fault
For "universal colour switching" see chapter ”21LEDColour
Assignments”.
Power supply via AS interface bus (without external power supply):
 Max.powerconsumptionfromAS-i:<160mA
Power consumption during normal
operation from the AS-i
(aftercurrentreduction):    <150mA
3 valves activated, 1 position reported back by LED display,
no external initiator
Integrated short-circuit protection
english
Control Head Type 8681