Velleman projects K6714-16 Assembly instructions - Manual (Page 12)

12
Tips at malfunctions
18. Remedies in the case of malfunction caused by the relays
If the relays are used to switch alternating voltage, it may be necessary to
suppress them.
1. Suppressing resistive loads (Lamp, resistor,…) :
2. Suppressing inductive loads (Transformer, motor,…) :
3. When above solutions fail :
In this last case an independently feeded DC-relay is used, wich is installed
as close to the load as possible.
220V - 240V
Siemens SIOV
S14K275
110V - 125V
Siemens SIOV
S14K150
Pay attention to the diode witch is fit ANTI-parallel with the coil, its
cathode connected to the plus side, its anode connected to the minus
side! This relay MUST be feeded by a separate power supply. The
VDR must be suited for the voltage to be switched.
Fig. 3.3
Fig. 3.2
Fig. 3.1
H67146(16)IP'1_rev1.pub
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Tuesday, August 25, 2009 12:14