Operation
Diaphragm Vacuum Pump N 828 / N 838
36
Translation of original Operating and Installation Instructions, english, KNF 121249-121517 09/19
7.2.3. External digital activation (.29 versions, optional)
If desired, the pump motor can be activated externally. This re-
quires a special setting at the factory (contact data: see
www.knf.com).
External activation is through the 6-pin communication connection
(see Fig. 19).
Connector type:
Micro-Match Female Top Entry
Part no.:
7-215079-6
When the motor is activated externally, the control inputs are
inactive.
Connection communication plug (see Fig. 19)
PIN 1
– do not connect
PIN 2
– do not connect
PIN 3
– GND
PIN 4
– 5V (max. 50 mA)
PIN 5
– TX MBLC
PIN 6
– RX MBLC
Motor connection options
– external control unit
Fig. 26: External activation options (optional)
The following motor functions can be controlled:
▪
Motor remote ON/OFF
In the factory condition, the motor is OFF when operating
voltage is applied. However, as an option the motor can be
ON when operating voltage is applied.
▪
Motor speed
Setting motor speed within speed limits n
min
and n
max
.
▪
Reed-out of the following process parameters:
-
Actual/Nominal motor speed
-
Control limit of motor speed
-
Operating current of the motor
-
Temperature of the motor controller
-
Fault status
-
Software version number
External activation
