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Concept

Concept


Products: MP-V, RP-C, RP-V
Functionalities: Hardware
Product version: 2022, 2023, 2024
6/19/2023

RS-485 Power Adapter

The RS-485 Power Adapter (SXWNISORS485P10001) is used with BACnet/IP controllers to support the connection of various types of devices to an RS-485 based network such as Room Bus, Sensor Bus, or a Modbus RTU network. The RS-485 Power Adapter is a flexible device that can be used for several different applications, which mainly fall into the following categories:

  • Convert a BACnet/IP controller RS-485 interface

  • Enable injection of 24 VDC from an external power supply to an RS-485 bus

The RS-485 Power Adapter can be used with all BACnet/IP controller (RP and MP controller) models. The types of RS-485-based networks supported differ between the RP and MP controller models.

 
action_zoom_plus_stroke RS-485 Power Adapter

RS-485 Power Adapter

RS-485 Power Adapter Device Installation

The RS-485 Power Adapter has a protruding bracket on each long side with a mounting hole to facilitate installation of the device with two screws (not included). The device can also be fastened using cable ties or mounted in line with a cable run. The device has two anchor points that can be used to fasten cable ties or other accessories for bundling wires. The adapter is suitable for plenum use.

For more information, see Installing an RS-485 Power Adapter .

RS-485 Power Adapter Ports, Terminals, and Switch

The RS-485 Power Adapter is equipped with dual RJ45 ports, a 4-position removable screw terminal block, and a 2-pole slide switch.

For more information, see RS-485 Power Adapter Ports, Terminals, and Switch .

Convert a BACnet/IP Controller RS-485 Interface

The RS-485 Power Adapter can be used to convert a BACnet/IP controller (RP or MP controller) RS-485 interface from RJ45 port to screw terminals, which is required to be able to connect the controller to an RS-485 based network such as a Modbus RTU network. The types of RS-485-based networks supported differ between the different RP and MP controller models.

For more information, see Convert a BACnet/IP Controller RS-485 Interface .

Enable Injection of 24 VDC from an External Power Supply to an RS-485 Bus

The RS-485 Power Adapter can be used for injecting 24 VDC from an external 24 VDC power supply to an RS-485 based network such as Room Bus or Sensor Bus. This is useful, for example, in applications where you want to extend the RS-485 bus by connecting (daisy-chaining) additional devices, which the RP or MP controller would otherwise not be able to power. The external power supply is connected to the bus via the adapter.

For more information, see Enable Injection of 24 VDC from an External Power Supply to an RS-485 Bus .

RS-485 Adapter Regulatory Compliance and Approvals

This section provides information on regulatory compliance and approvals for the RS-485 Adapters.

For more information, see RS-485 Adapter Regulatory Compliance and Approvals .

Specifications

Electrical
Required external power supply ratings
Output
Regulated 24 VDC
  
Isolated (non-grounded) terminals
Safety class and certification
IEC protection class II
  
Safety agency certification applicable to the country or area where used
Output power
Minimum 3 W (125 mA)
  
Maximum 100 W or 100 VA
Maximum out port bus load
3 W
Environment
Ambient temperature, operating
0 to 50 °C (32 to 122 °F)
Ambient temperature, storage
-40 to +70 °C (-40 to +158 °F)
Humidity
Maximum 95 % RH non-condensing
Material
Plastic flame rating
UL94 V-0
Plenum rating
UL 2043
Ingress protection rating
IP 20
Mechanical
Dimensions
See drawing below
 
action_zoom_plus_stroke
Weight
24 g (0.84 oz)
Installation
Connection to RS-485 bus via Cat 5 UTP cable (not included) a
Installation options
The adapter can be fastened using screws or cable ties or mounted in line with a cable run. a
  
Approved for plenum installation (UL 2043)
Hardware
Connectors
RS-485, 4-pole removable screw terminal block
  
RS-485, dual RJ45 ports
Switch
2-pole slide switch
  • Hardware Overview
  • RS-485 Adapters
  • Installing an RS-485 Power Adapter
  • RS-485 Power Adapter Ports, Terminals, and Switch
  • Convert a BACnet/IP Controller RS-485 Interface
  • Enable Injection of 24 VDC from an External Power Supply to an RS-485 Bus
  • RS-485 Adapter Regulatory Compliance and Approvals
  • RS-485 Communications
  • Wiring