The ABB TK506, order code 3ABD00029650, is an RS485 isolator accessory for PLC systems. It provides a D-Sub to 5-pole terminal interface and is rated IP20.
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Integration Note
The TK506 sits between the CPU or communication module and the RS485 fieldbus segment. The D-Sub connector mates directly with the PLC's COM port; the terminal side strips to a 5-pole screw clamp for field wiring. IP20 rated for use inside a control cabinet. No additional isolation rating beyond the RS485 bus isolation is specified; confirm galvanic separation requirements against your field devices.