PLC - Dobot coupling module / 8-channel 2-way optocoupler

Funduino PLC coupler - securely connect Siemens PLCs and other 24V systems to the DOBOT Magician

The Funduino PLC Coupler enables a reliable and galvanically isolated coupling between a Siemens PLC with 24 V logic and the DOBOT Magician via its GP2 port or other available parts.
The module was specially developed to connect industrial PLC signals to the 3.3 V I/O logic of the DOBOT safely and without risk to the robot.

Safe voltage adaptation in both directions

As the DOBOT Magician does not tolerate 24 V signals, the Funduino PLC coupler integrates two galvanically isolated optocouplers/level converters:

24 V → 3.3 V (4-channel)
PLC outputs can be safely routed to a digital input of the robot (e.g. start signal).

3.3 V → 24 V (4-channel)
The robot can safely report status or ready signals back to the PLC.

This enables robust bidirectional communication between the PLC and robot - without a direct electrical connection and without the risk of overvoltage damage

Developed for education, laboratory and industrial training

The PLC coupler is ideal for:

• Training & teaching (PLC basics, robotics integration)
• Technology labs & universities
• Industry-related training setups
• Didactic demonstrations of handshake protocols
• Typical applications are start/finish signals, simple sequence controls or learning PLC robot handshakes (start → action → feedback)

Simple integration on the GP2 port

The Funduino PLC coupler is designed to use the EIO14 / EIO15 pins on the GP2 port of the DOBOT Magician as recommended by the manufacturer.
A pre-assembled 4-pin GP2 connector facilitates connection and reduces wiring errors.

In addition, however, all channels of the optocouplers are available. A total of 8 channels.

Highlights at a glance

• Safe 24 V ↔ 3.3 V level adjustment
• Galvanic isolation to protect the PLC and robot
• Bidirectional communication (PLC → robot ↔ PLC)
• Ideal for Siemens PLC (e.g. S7-1200)
• Suitable for DOBOT Magician (GP2 port)
• Ideal for education, training and demonstration
• Tried and tested in practice with example handshake

Scope of delivery

1x optocoupler module 24 V → 3.3 V (4-channel)

1x optocoupler module 3.3 V → 24 V (4-channel)

1x Matching housing

2x Suitable JST connector for the Dobot Magician

1x Instructions with sample program for the Dobot Magician

This is a construction kit. The wiring must be carried out according to the instructions.