Burkert Type 1094 - Manual (Page 10)

8 - 1094
english
3.4 Outputs
Output transistor Positiv-switching transistor
Load current 0 to 250 mA
Output voltage 24 V DC
Clock frequency 270 Hz
Number of outputs One valve output each for + and -
Output for the proportional valve
To regulate the Type 2832 proportional vlave, the controller outputs a current-regu-
lated PWM signal via a transistor.
Output for the control of the vaccum pump motor
Output transistor „Open-Collector“ transistor output
Load current 100 mA
Output voltage 24 V DC
Special freatures Freewheeling diode, after-run time adjustable (in con-
nection with the manual control unit Type MKNE-1094)
Number of outputs One pump output each for + (24 V) and – (GND)
The „open-collector“ output shown in Figure 4 is used for the control of a relay/con-
tactor for switching the vacuum pump motor.
The „open-collector“ output is switched active by the controller as long as the propor-
tional valve is open.
from CPU
(Port Bx)
2.2 k
Ω
+ 24 V
Output
BC 337 or similar
10 k
Ω
Figure 4: "Open-Collector" transistor output to the pump controller