STW12V
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8.2 Current sensor or contact connection only:
If the current sensor turns on or the contact closes, the relay turns on (yellow LED is on).
If all sensors are off or all contacts are open (yellow LED flashes), the relay switches off again after the
delay time set with the setting knob " t " (yellow LED goes out).
The output is a potential-free switching contact.
8.3 Mixed operation: Transducers, sensors and contacts can also operate in mixed mode
Note
:
The wires can also be looped through the STWA1(H) current transducer several times if the minimum
response threshold is too low. The current transducer STWA1(H) can be loaded with a maximum current AC
100 A. The switch point setting for current " I " is only active when the transducer is connected.
If only sensors or contacts are connected, the switch point setting for current " I " does not work.
Tipps:
Response threshold
is too high
(current flow in the wire is too low):
wires pass through the current transducer STWA1(H) several times.
Response threshold
is too low
(base load current must be extinguished):
connect a resistor (0.25 W / 200 V) before the corresponding input of STW, to the
current transducer STWA1(H).
750 Ω resistor = increase by a factor 2
330 Ω resistor = increase by a factor 4
120 Ω resistor = increase by a factor 10
Due to large tolerances that must be considered, we recommend that the best values be determined
by trial and error method.
Length of connecting cables STWA1(H):
Up to 50 m, but much longer are also possible.
Shielding may be required when laid parallel to power lines
9 Technical data
Control voltage Us:
DC 24 - 240 V
AC 20 - 264 V
Tolerance
-
with ≤ 4 pcs. S1 current sensors
DC 20.4 - 297 V
AC 20- 264 V 50/60 Hz
- with > 4 pcs. S1 current sensors
DC 80.0 - 297 V
AC 80- 264 V 50/60 Hz
Power consumption
- without S1 current sensors
< 2 W
< 5 VA
- with 4 pcs. S1 current sensors
< 3 W
< 9 VA
- with 12 pcs. S1 current sensors
< 5.5 W
< 16 VA
