WEG PLC300, User Manual, Page: 21 / 76

Connections
PLC300 | 4-5
XC
2
L2
I
L1
+
V
-
DO
1
1 7 4 10 2 8 5 11 12 13 14 3 9 6
DO
9
DO
5
DO
3
VBB
COM
AO1
AO1
(I)
AO1
(V)
DO
7
DO
2
GND
BB
DO
6
DO
4
DO
8
Figure 4.5: Example of connection of the analog output (XC2)
4.7 ENCODER INPUT
The PLC300 features an insulated input for differential encoder, with its own supply of 5 or
12 V. The maximum frequency of the pulses is 100 kHz. Maximum length of the encoder
cable: 30 m. This input has a circuit that detects fault in the encoder signals, in case of
encoder with complementary signals. This fault can generate an alarm that must be
enabled on the WPS. A non-complementary encoder can also be used, but, in this case,
the fault circuit must remain disabled.
An internal insulated supply of 5 or 12 Vdc, with capacity of up to 300 mA, is available for
the encoder. The selection between 5 or 12 V must be done in the PLC setup. The default
value is 5 V.
The ladder offers a READENC block (encoder counter), that must be used to count.
A system marker indicates the encoder speed in hertz (Hz). The direction of rotation is also
informed by a system marker.