MesCom
– Workshop Manual – D6000/i14/V10
© Dycon Ltd 2014
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8
2.6 Outputs
Outputs have a maximum switching capacity of 30v 100mA and are open drain type.
2.6.1 Output Wiring Options
MesCom outputs can be connected
directly to any device input that
accepts open drain/ open collector
signals.
For inputs requiring a voltage signal,
a pull up resistor will be required.
Ip1
Ip2
Ip3
Ip4
0V
Op1
Op2
Supply
30V max
0V
Connected device
Input
Pull up resistor if
required by
connected device
Small load of no greater than 30V
100mA can be connected directly to
the MesCom open drain output.
Ip1
Ip2
Ip3
Ip4
0V
Op1
Op2
Supply
Max 30v
Supply
Ground
Load
Max 100mA
For higher power loads the output
will need to be connected to a relay.
The MesCom output is protected
against back EMF but we
recommend fitting an additional
reverse EMF protection diode for
added protection, as shown.
The relay can be of any type;
traditional, optical or solid state.
Using a relay also isolates the
MesCom from the load and is
recommended with cable runs of
longer than 1 metre.
Ip1
Ip2
Ip3
Ip4
0V
Op1
Op2
recommended reverse EMF protection diode
T
o
h
ig
h
p
ow
e
r
lo
a
d
Coil Supply
Max 30v
Coil current
Max 100mA
Coil Supply
Ground
Relay