5 | Installation
24 | 44
Instruction Manual COBRA NC 0400 B WCV_EN_en
5.8
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.
5.8.1
Wiring Diagram Temperature Switch
Part no.:
0651 556 533
U = 250 VAC ; I = 2.5 A
►
cos
φ
= 1
U = 250 VAC ; I = 1.6 A
►
cos
φ
= 0.6
U = 48 VDC ; I = 1.25 A
Contact :
Normally closed
Switch point:
T
trip
= 85 °C
2
1
T
1 = White ; 2 = Brown
5.8.2
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
Contact:
Normally open
2 (-)
1 (+)
1 = Brown ; 2 = Blue
Switch point:
2 SLM
►
min. volume flow
5.8.3
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
2
4
3
4
1
L
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”
