USB-AD
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3.2.2
Connecting a Relay
A connected relay is ideal to switch higher
currents. Since the field coil of the relay
requires a higher current than provided by
the measurement system at one line, a
transistor is connected ahead.
Relay cards featuring 8 outputs are
available at bmcm.
3.2.3
Connecting a Lamp
A transistor can be used to switch higher
loads. The selected transistor must comply
with the maximum switchable current.
The figure on the right shows an
application with a maximum current of
100mA.
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