Burkert Type 8681 User Manual
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24 V DC - Design
solenoid valves:
Power input per solenoid valve: max. 0.8 W (0.9 W during activation)
Power consumption per solenoid valve: 67 mA at 12 V DC
34 mA at 24 V DC
29 mA at 28 V DC
Operating mode:
Long-term operation (100 % ED)
central display of the switching states: 42 mA with a power supply of 24 V DC per illuminated display;
Color switching see chapter
Outputs/binary feedback signals: S1 out - S4 out
Design:
Normally open contact, PNP output
short-circuit-proof,
with self-clocking short-circuit protection
Switchable output current:
max. 100 mA per feedback signal
Output voltage - active:
≥ (operating voltage - 2 V)
Output voltage - inactive:
max. 1 V in unloaded state
Output/analog s3 out feedback signal (separate order variant "analog"!):
Signal output:
S3 out (binary feedback signal S3out not available)
Type:
Current source (4 to 20 mA)
Max. burden:
≤ 500 Ohm
Max. fault:
±1 mm (incl. measurement fault by the position measuring system)
input / proximity switches (external initiator: s4 in):
Power supply:
Voltage present at control head - 10 %
Current carrying capacity, sensor power supply: max. 90 mA
Short-circuit protection
Design:
DC 2- and 3-conductor,
NO or NC (factory setting NO), PNP output
Input current 1 signal:
I
Sensor
> 6.5 mA, limited internally to 10 mA
Input voltage 1 signal:
U
Sensor
> 10 V
Input current 0 signal:
I
Sensor
< 4 mA
Input voltage 0 signal:
U
Sensor
< 5 V
Valve control inputs (y1 - y3):
Signal level - active:
U > 10 V, max. 24 V DC + 10 %
Signal level - inactive:
U < 5 V
Impedance:
> 30 kOhm
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Control Head Type 8681