DIG-ISO
Capacitive digital isolator
Transfers digital information between separately referenced electrical domains through a capacitive isolation structure.
Schematic
Symbols · ISO 485
Isolated RS-485 transceiver
In plain English
What does Isolated RS-485 transceiver mean?
An isolated RS-485 interface transfers compatible serial communication across a specified isolation barrier.
A simple example
A fieldbus interface can separate controller and bus electrical references using the selected isolated device.
What the drawings help you do
Draw the serial logic connection, isolation barrier and differential bus pair as separate roles. Label bus-side power and any direction-enable signals. Isolation changes the relationship between circuit references; it does not remove the need to define cable topology, termination and the application protocol.
- Fieldbus
- The selected external communication connection between equipment.
- Direction enable
- A control input used by certain transceivers to select a transmitting or receiving state.
Before using this reference
- Show controller and bus reference domains.
- Reference bus-side power and direction control.
- Identify termination, protection and the application protocol.
Can isolation replace proper bus termination?
No. Isolation addresses electrical separation between domains. Termination addresses the signal behaviour of the cable link; both must be considered where the selected design requires them.
Read the source: Isolated communication interfaces
Schematic · ISO 485
A distinction that matters
Isolation does not remove the need to design the cable, termination and bus protection.
Sources you can follow
These public references support the explanation and provide further detail. Their graphics and downloadable files remain with their publishers.
Isolated communication interfaces
Isolated communication interfaces: public technical context for the named function. Product and compliance details remain with the publisher.
About this graphic
This illustration was authored independently by Elora Grid to explain the concept. It is not reproduced from a customer drawing, an official standard graphic or a manufacturer CAD file. Its correspondence to an exact IEC or IEEE symbol identifier has not been certified.
SVG and DXF downloads contain this original artwork. DXF uses unscaled drawing units; a GA envelope supplies no product dimensions, clearances or fabrication information. Original artwork is available under CC BY 4.0. Third-party references retain their own terms.
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An identified interface converting electrical power between documented circuit forms.
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