KNF NPK012 Series, Инструкции по эксплуатации и монтажу

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Operation Swing Piston vacuum pump NPK012
20 Translation of original operating and installation instruction, Englisch, KNF 316780-316783 05/19
8.2 Control functions DC-B-M
8.2.1 Speed specification
Speed without external setpoint setting
The motor operates the pump with a non-variable speed over the entire
permissible pressure range (see Fig. 4).
Speed with external setpoint setting
The motor operates the pump with a variable speed between n
min
and n
max
(see Fig. 5). The speed is specified by means of the control voltage (U
Ctrl
).
Specification of the speed is performed via the blue lead ( Connection dia-
gram for motor controller NPK 012_DC-B-M ).
8.2.2 Speed output
The speed is output via the green lead ( Connection diagram for motor
controller NPK 012_DC-B-M ).
The motor controller generates a speed synchronous square frequency ().
Fig. 6 Speed output NPK 012_DC-B-M
8.2.3 Input signal for direction of motor rotation
The input signal for direction of motor rotation is applied via the yellow lead
(
Connection diagram for motor controller NPK 012_DC-B-M ).
8.2.4 Input signal for remote ON/OFF
The input signal for remote ON/OFF is applied via the white lead ( Connec-
tion diagram for motor controller NPK 012_DC-B-M ).
8.3 Intermittent operation (NPK012PR)
Switch-on duration/pulsed operation
At pressures in excess of 2.5 bar, the switch-on duration must be limited.
We recommend a maximum switch-on duration of 15 min followed by a
rest time of equal length.
The switch-on duration and switch-off duration are dependent on the heat
generated in the pump head as well as its heat dissipation while at rest. If
the pump is allowed to cool further, the switch-on duration can be ex-
tended or the rest phase shortened.
The maximum permissible temperature in operation should not exceed
150°C at the pump head and 95°C at the motor housing.
See sketch for measuring point: