Grundfos DMX 227 Installation And Operating Instructions Manual page 15

9.1.5 Relay outputs
The relay output connection depends on the
Note
application and the connected actuators.
• Interference suppression is required for inductive loads (also
relays and contactors).
• If this is not possible, protect the relay contacts using a
suppressor circuit as described below.
With AC voltage
Current up to Capacitor C
10 μ F, 275 V
60 mA
47 μ F, 275 V
70 mA
100 μ F, 275 V
150 mA
220 μ F, 275 V
1.0 A
1 1
K1 K2
L N
230 V AC /
115 V AC
Fig. 16 Electrical connection of the electronics
9.1.6 Screwing the sensor into the dosing head
• Screw the sensor from the lower side into the hole of the
dosing head flange (M14 x 1.5).
– Now the diaphragm leakage sensor is ready for start-up.
Fig. 17 Screwing the sensor into the dosing head
Resistor R
390 Ω , 2 W
22 Ω , 2 W
47 Ω , 2 W
47 Ω , 2 W
S1
1 1 1 1 1
K3 K4 K5 K6 K7
PE PE N
Contact 1 (non floating 230
V AC / 115 V AC)
With DC voltage
• Connect the free-wheeling diode parallel to the relay or
contactor.
DC +
-
Fig. 15 Suppressor circuit DC/AC
Provide relay outputs on site with an appropriate
Caution
back-up fuse!
These connections depend on the type of actuator
used and should only be understood as guidelines.
Note
Refer to actuator documentation.
S2
1 1 1 1
K8 K9 K10 Green Yellow White
Contact 2
(floating)
AC
R
C
1 1
Sensor
15