Electrical Connection | 6
Instruction Manual COBRA NC 0100-0300 B ACV_EN_en
25 | 48
6.5
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.
6.5.1
Wiring Diagram Temperature Switch
Part no.:
0651 555 983 for NC 0100 B,
0651 555 985 for NC 0200 B,
0651 555 987 for NC 0300 B
U =
6 … 30 VDC ; I = 10 … 100 mA
Contact :
Normally closed
Switch point:
T
trip
=
85 °C for NC 0100 B,
106 °C for NC 0200 B, 125 °C for NC 0300 B
2
1
T
1 = White ; 2 = Brown
6.5.2
Wiring Diagram Flow Switch (Optional)
Part no.:
RC15-14-N3 (ref. Fuchs)
U = 5 … 25 V ; I = 1 … 3 mA
Switching element function:
NAMUR, bistable
2 (-)
1 (+)
1 = Brown ; 2 = Blue
For labyrinth seals, oil lubricated single mechanical
seals and PTFE shaft seals:
For gas lubricated double mechanical seals:
Contact:
Normally open
Switch point:
1.5 SLM
►
min. volume flow
Contact:
Normally closed
Switch point:
1 SLM
►
max. volume flow
6.5.3
Wiring Diagram Pressure Switch (Optional)
Part no.:
0653 518 304
Contact:
Normally closed
U = 250 VAC ; I = 6 A
U = 12 … 220 VDC ; I = 6 … 0.25 A
3
1
P
PE
Switch point:
P
trip
= 2.5 bar (relative)
►
min. admissible pressure
6.5.4
Wiring Diagram Level Switch (Optional)
Part no.:
0652 556 531
Connector:
M12x1, 4-pin
< 6 mW at I < 1 mA;
< 38 mW at I = 3.5 mA
Switching element function:
NAMUR
Contact:
Normally closed
1 = Brown ; 4 = Black
Switch point:
L
warning
= LS1
►
pin 1 + 4
►
low level “warning”
L
trip
= LS2
►
pin 1 + 4
►
low level “stop flushing”
