6 | Electrical Connection
20 | 40
Instruction Manual COBRA NC 1000 B WCV_EN_en
The intended rotation direction of the motor is defined by the illustration below:
●
Jog the motor briefly.
●
Watch the fan wheel of the motor and determine the direction of rotation just before the fan
wheel stops.
If the rotation of the motor must be changed:
●
Switch any two of the motor phase wires.
6.3
Electrical Connection of the Monitoring Devices
NOTE
In order to prevent potential nuisance alarms, Busch recommends that the control system is
configured with a time delay of at least 20 seconds.
6.3.1
Wiring Diagram Resistance Thermometer
Part no.:
0651 552 252
Connector:
M12x1, 4-pin
U = 7.5 … 30 VDC
4 ... 20 mA
►
-50 ... 150 °C
Trip signal:
T
trip
: 70 °C
1
2
4
3
3
1
+
-
1 = Brown ; 3 = Blue
6.3.2
Wiring Diagram Level Switch
Part no.:
0652 569 236
Connector:
M12x1, 4-pin
U = 10 … 30 VDC (DC-PNP)
I
max
= 200 mA
Contact:
Normally closed
1
2
4
3
(+)
1
3
4
(-)
0.5 A
1 = Brown ; 3 = Blue ; 4 = Black
Switch point:
L
trip
►
pin 1 + 4
►
low level “stop the machine”
