Eliwell EWCFW-08 User Manual page 46

CHAPTER 3 - INSTALLATION AND CONNECTION
3.2.5.2 Digital Input as
High Level Active
(S1:1 to ON)
1
XC1:1
DI1
2
XC1:2
DI2
Figure 3.15 - Equivalent circuit - Digital inputs as high logic level
46
This option can be selected when a PLC is used with PNP
transistor output (high logic level to activate the DI) or PLC
with relay output is used. For this last alternative you must
apply an external power supply 24 V +/- 10 %.
a) Example using a PLC - relay output
b) Example using a PLC - PNP transistor output
Figure 3.14 a) and b) - Configuration of the active digital inputs as
In this option, the equivalent circuit at the inverter side is
presented in the figure 3.15.
10 V
2k
10 V
2k
24 V (external)
external 24 V)
PLC output relay
24 V (internal PLC)
PLC output
PNP
GND (PLC)
high logic level
+12 V
SMD
Optocoupler
SMD
Optocoupler
Connector XC1
1 DI1
2 DI2
3 DI3
4 DI4
5 GND
GND (source
Connector XC1
1 DI1
2 DI2
3 DI3
4 DI4
5 GND
S1:1 in ON
GND