WEG PLC300 User Manual - page 11

Introduction to PLC300

PLC300 | 2-3 

Watchdog:

The PLC300 has a user-configurable watchdog with minimum time of 300 ms.

In case of watchdog, the state of the outputs can be configured, as well as an output for 

exclusive use of the watchdog.

Expansion modules:

Up to 2 I/O expansion modules can be connected to the PLC300. The following modules 

are compatible:

IOA-01: 1 analog input of 14 bits in voltage and current; 2 digital inputs; 2 analog outputs 

of 14 bits in voltage and current; 2 open collector digital outputs.

IOB-01: 2 analog inputs insulated in voltage and current; 2 digital inputs; 2 analog outputs 

insulated in voltage and current (same output programming of the standard CFW-11); 2 

open collector digital outputs.

IOC-01: 8 digital inputs; opto-coupled; 24 Vdc; high/low level actuation; 4 digital outputs; 

relay NO contacts; capacity of 240 Vac/1 A.

IOC-02: 8 digital inputs; opto-coupled; 24 Vdc; high/low level actuation; 8 digital outputs, 

open collector; 24 V/0.1 A.

IOC-03: 8 digital inputs; optocoupled; 24 Vdc; configurable, high/low level actuation; 

7 PNP, protected outputs; 24 Vdc; 500 mA.

IOE-01: 5 inputs of single or triple PTC thermistors with reinforced insulation compared 

to the 0 V of the PLC300.

IOE-02: 5 inputs of PT100 thermistors with reinforced insulation compared to the 

0 V of the PLC300.

IOE-03: 5 thermistor inputs type KTY84 with reinforced insulation in relation to the 

0 V of PLC300.

Communication interfaces:

The PLC300 has the following communication interfaces:

RS-485 insulated with Master/Slave Modbus RTU protocol.

CAN insulated with Master/Slave CANopen protocol.

RS-232 with Modbus RTU protocol for monitoring and remote programming, via modem 

on telephone line, and ASCII protocol for bar code readers.

USB to communicate with the computer.

Ethernet 10/100 with Modbus TCP protocol.