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Concept

Concept


Products: Twisted Pair Adapter
Functionalities: Hardware
Product version: 1.8, 1.9, 2.0, 2.1, 3.0, 3.1, 3.2, 3.3, 2022, 2023, 2024, 7.0, 7.1
12/18/2025

Twisted Pair Adapter Power Supply

The Twisted Pair Adapter supports power input from either a standard 24 VAC or 24 VDC source.

To supply power to the adapter, you can use either a transformer or a DC power source:

  • Class 2 (EN 60742) transformer delivering a nominal 24 VAC at 50/60 Hz

  • DC power supply providing a nominal 24 to 30 VDC with sufficient output capacity

For more information, see Twisted Pair Adapter .

The power supply can be the same as the one used for the BACnet/IP controller (MP or RP controller) or automation server (AS-P-3, AS-P or AS-B server). See the following figure for example.

 
action_zoom_plus_stroke Example with AS-P-3 server and RP-C 24 V controller model
Figure: Example with AS-P-3 server and RP-C 24 V controller model

For RP-C 230 V controller models, the 24 VAC output can be used to power the adapter. See the following figure for example.

 
action_zoom_plus_stroke Example with AS-P-3 server and RP-C 230 V controller model
Figure: Example with AS-P-3 server and RP-C 230 V controller model

The adapter features an isolated design for error-resistant installation.

The adapter is based on a half-wave rectified, isolated design, which is complemented with electronic protection components for transient protection, overload protection, and EMC compliance. The design provides galvanic isolation. This helps minimize the risk of damage due to earth currents.

The adapter does not supply power to the twisted pair network.

  • Twisted Pair Adapter
  • Wiring
  • Twisted Pair Adapter LEDs
  • Twisted Pair Adapter Button and Switch
  • Twisted Pair Adapter Screw Terminals and Port