Figure 9: Communication interface box – CANopen
The communication interface box provides connectors for power, control
signals and configuration media.
The interface box is delivered in three versions:
• CANopen – interface using the CAN (Controller Area Network)
communications standard. Eltorque recommends a maximum of 80
nodes on 500 m/1660 ft. cable.
The actuator can also be delivered with Dual CAN. Standard CANopen is
described in the main parts of this User Manual, while Dual CAN is
described in Chapter 8 on page 57 and onwards.
• Digital – interface allowing simple Open and Close operation of valves.
Actuators with Digital Interface can be controlled directly from a
conventional panel with buttons/switches and indicator lamps.
Alternatively, it can be controlled from a PLC with digital inputs and
outputs.
• Analog – interface allowing regulating valves where positioning of the
valve is needed. The actuator provides continuous feedback of its actual
position, for comparison between desired and actual position. Both
positioning and feedback signals are analog 4-20 mA. The
Analog Interface also has a digital Alarm output, which is trigged by
failures in both actuator and valve.
If a Modbus interface is required, please contact your Eltorque
representative.
More technical details on the different communication interfaces are given
in Chapter 7 Technical Details on page 53.
The Product ID label on the actuator housing shown in Figure 10 (In orange
rectangle) states the actuator family, generation, torque, power supply
requirement, IP rating, type approval, the production serial number, and the
production date. In the red rectangle is a computer readable QR code
containing a serial number.
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