Concept
Isolated RS-485 Adapter
The Isolated RS-485 Adapter (SXWISORS48510001) is used when connecting a BACnet/IP controller that supports reconfiguration for BACnet MS/TP communication to a BACnet MS/TP (RS-485) network. The Isolated RS-485 Adapter has an isolated RS-485 transceiver and is used when the BACnet MS/TP (RS-485) network is comprised of isolated controllers, such as MNB BACnet devices (zone controllers) and selected others.
The adapter converts the BACnet/IP controller RS-485 Com port RJ45 interface to screw terminals, which is required to be able to connect the controller to a BACnet MS/TP network and the RS-485 Com port screw terminals of an automation server.
A separate connection cable is required to connect the adapter to the controller. The cable is not included and needs to be purchased separately.
The RS-485 Adapter can be used with BACnet/IP controller models that support reconfiguration for BACnet MS/TP communication. For more information, see SpaceLogic RS-485 Adapters .
The BACnet/IP controller needs to be reconfigured to communicate with automation servers based on the BACnet MS/TP protocol, instead of the BACnet/IP protocol. For more information, see RP-C BACnet MS/TP Support .
RS-485 Adapter Device Installation
The RS-485 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 RS-485 adapter is suitable for plenum use.
For more information, see Installing an RS-485 Adapter .
Isolated RS-485 Adapter Connection and Wiring
The Isolated RS-485 Adapter is equipped with an RJ45 port for connection to a BACnet/IP controller RS-485 Com port and a 4-position removable screw terminal block for connection to a BACnet MS/TP (RS-485) network.
For more information, see Isolated RS-485 Adapter Connection and Wiring .
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 | |
DC input supply voltage
|
24 VDC (powered by the BACnet/IP controller)
|
Maximum power consumption
|
0.4 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
|
|
|
|
Weight
|
80 g (2.82 oz)
|
Installation
|
Connection to RS-485 Com B via Cat 5 UTP cable (not included)
a
|
| a) For more information, see chapter “Connecting an Isolated RS-485 Adapter”. | |
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)
|
|
| a) For more information, see chapter “Installing an RS-485 Adapter”. | |
Maximum Cat 5 UTP cable length
|
0.3 m (12 inches)
|
| The Cat 5 UTP cable is not included. | |
| Hardware | |
Connectors
|
RS-485, 4-pole removable screw terminal block
|
RS-485, RJ45 port
|
|
| RS-485 transceiver characteristics | |
Transceiver type
|
Failsafe
|
Isolated
|
|
External biasing
|
None required
|
Total Unit Load (UL) per device
|
0.18 UL
|
Hardware Overview
RS-485 Adapters
RP-C BACnet MS/TP Support
Installing an RS-485 Adapter
Isolated RS-485 Adapter Connection and Wiring
RS-485 Adapter Regulatory Compliance and Approvals
RS-485 Communications
Wiring