Velleman projects K8023 Assembly instructions - Manual (Page 9)

9
Connect both PCB’s P8023S and P8023R according to fig.1.
Both push buttons and switches can be used to control the
inputs. Keep the distance between the switches or push
buttons and the circuit as short as possible. If the circuit is
used in a noisy environment (e.g. proximity of electric motors,
transformers, ….) or if the distance between the switches and
the circuit exceeds 1m (3"), a shielded cable must be used to
connect the switches. The shield must be connected to the
‘COM’ terminal.
If the K8023 circuit is powered from
an AC source, then you will need an
external DC source to power the
relays, and the ‘+ Vext’ terminal must
be connected. (fig 1).
13. Hook - up & Testing
Hook-up & testing
P8023S
P8023R
+VTX- COM 1 2 3 4 5 6 7 8 9 10
S1 S2 S3 S4 S5 S6 S7 S8 S9 S10
RY1...............................................................RY10 +
-
V
ext 12V/300mA
12..15Vin +VTX- 1 2 3 4 5 6 7 8 9 10 +Vext GND
FIG. 1.0