Johnson Controls TL-BRTRP-0, Руководство по установке, Страница: 3 / 10

MS/TP port
The MS/TP port uses an EIA-485 transceiver connected to both a 3-pin removable connector and
an RJ-11 connector. The + and - lines of the EIA-485 transceiver tie to RT+ and RT- pins of both
connectors. The COM pins of both connectors tie to the circuit ground of the EIA-485 transceiver.
The port is electrically isolated from the USB power.
The router can support 127 MS/TP devices. Up to 32 devices on a single segment are supported,
and you can use repeaters to add additional devices or to extend bus length. The router supports
baud rates of 9600; 19,200; 38,400; or 76,800 bps.
Note: Metasys and FX controllers support a BACnet router connection only at the field
controller (FC) bus, not at the sensor actuator (SA) bus.
Use field wiring to connect the BACnet router to the controller. A custom cable must be used to
connect the BACnet router to the FC RJ12 connector of a Metasys and FX controller. A standard
modular jack 6-pin cable does not function correctly. The following figure and table provide the
pinout required for the custom cable.
Figure 2: BACnet router to Field Controller cable pinout
Table2: Custom RJ-11 Cable Connections
BACnet Router Plug Field Controller Plug
Terminal 2- Terminal 2-
Terminal 4 (COM) Terminal 5 (COM)
Terminal 5+ Terminal 1+
Ethernet port
The Ethernet port offers a shielded RJ-45 connector. Through auto-negotiation and Auto-MDIX,
the port automatically matches its duplex setting, flow control, data rate, and signal polarity to
whatever is needed by the attached equipment. Use the included CAT5 Ethernet cable for the
connection to your computer.
IP address reset switch
The reset switch is a small hole located on the side of the case. If you press the reset switch with
a paper clip (or similar device) for at least 1 second, the switch resets to the default values of the
3 Portable BACnet/IP to MS/TP Router Installation Instructions