WEG PLC300 User Manual - page 19
Connections
PLC300 | 4-3
The circuit of the digital outputs must be externally powered by a supply of 24 Vdc,
connected to the pins VBB(+) and GNDBB(-)
(1)
.
The outputs DO1 to DO8 are of PNP
(2)
type and can provide a current of up to 500 mA each.
DO9 is a Push-Pull
(3)
output, PWM type, and can supply up to 100 mA.
(1) See description of XC2.
(2) PNP Output: activate load connected to GNDBB.
(3) Push-Pull Output: Bi-directional, i.e., activates the load connected to GNDBB or to VBB.
Supply
24 Vdc
XC
2
L1
L2
L3
L4
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 4.3: Example of connection of the digital outputs (XC2)
Notes about the example:
1. The example shows two standard loads, L1 and L2, connected to the DO3 and DO5
outputs, which, when driven, apply VBB to the load (PNP outputs).
2. Loads L3 and L4 are connected to DO9, in push-pull format, i.e., when L3 is energized,
L4 is not, and vice-versa.
4.5 ANALOG INPUT
The analog input AI1 is differential, 12 bits, and can read signals from a voltage or current
source. If the signal source is far from the PLC, it is advisable to use a shielded cable.