Communication Wiring - - Protocols; General - Carrier 50TC Series Installation Instruction

Communication Wiring - - Protocols

General —
Protocols are the communication languages spoken by
control devices. The main purpose of a protocol is to
communicate information in the most efficient method
possible. Different protocols exist to provide different
kinds of information for different applications. In the BAS
application, many different protocols are used, depending
on manufacturer. Protocols do not change the function of
a controller; just make the front end user different.
PROTOCOL DS8
BACnet MS/TP
Unused
(Master)
Modbus
Unused
(Slave)
N2
Unused
(Slave)
LonWorks
Unused
NOTE:
DS = Dip Switch
BACnet MS/TP SW3 example shown
Baud Rate Selections
BAUD RATE
9600
19,200
38,400
76,800
Fig. 69 - - RTU Open Controller Address Switches
SW3 Protocol Selection
DS7 DS6
OFF OFF
OFF OFF
OFF OFF
ON ON
DS2 DS1
OFF OFF
ON OFF
OFF ON
ON ON
Fig. 68 - - RTU Open Controller SW3 Dip Switch Settings
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The RTU Open controller can be set to communicate on
four different protocols: BACnet, Modbus, N2, and
LonWorks. Switch 3 (SW3) on the board is used to set
protocol and baud rate. Switches 1 and 2 (SW1 and SW2)
are used to set the board's network address. See Fig. 68
and 69 for protocol switch settings and address switches.
The third party connection to the RTU Open controller is
through plug J19. See Fig. 70 for wiring.
NOTE: Power must be cycled after changing the SW1- - 3
switch settings.
Refer to the RTU Open v3 Integration Guide for more
detailed information on protocols, third party wiring, and
networking.
DS5 DS4 DS3
OFF ON OFF
ON ON OFF
OFF ON ON
OFF ON OFF
Fig. 70 - - Network Wiring
40
DS2 DS1
Select Baud Select Baud
Select Baud Select Baud
OFF OFF
OFF ON
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