Eliwell EWCFW-08 User Manual page 45

3.2.5.1 Digital Inputs as
Low Level Active
(S1:1 to OFF)
1
XC1:1
DI1
2
XC1:2
DI2
Figure 3.13 - Equivalent circuit – Digital inputs as low logic level
CHAPTER 3 - INSTALLATION AND CONNECTION
This option can be selected when a PLC is used with relay or
transistor output is used (low logic level to activate the DI).
a) Example using a PLC - relay output
PLC output relay
b) Example using a PLC - NPN transistor output
PLC output NPN
In these options, the equivalent circuit at inverter side is
presented in the figure 3.13.
10 V
2k
10 V
2k
Connector XC1
1
2
3
4
COM
5
Connector XC1
1
2
3
4
5
GND (PLC)
Figure 3.12 a) and b) - Digital inputs
as low logic level configuration
GND
SMD
Optocoupler
SMD
Optocoupler
DI1
DI2
DI3
DI4
GND
DI1
DI2
DI3
DI4
GND
S1:1 in OFF
+12 V
45