Burkert Type 8681 - Manual (Page 61)

61
120 V AC - Design
feedback signal output: S4 out is directly connected to S4 in
input / proximity switches (external initiator: s4 in):
Power supply:
voltage present at control head U
Nominal
= 120 V AC, 50/60 Hz
Current carrying capacity, sensor
power supply:
max. 0.7 A
Short-circuit protection
Design:
DC 2- and 3-conductor,
Normally open contact, L-switching
input current 1-Signal: I
Sensor
< 2 mA
Valve control inputs (y1 - y3):
Signal level - active:
U > 60 V AC
Signal level - inactive: U < 20 V AC
Impedance: > 40 kOhm
english
Control Head Type 8681