Rev.01 03-27-17
Page 38 of 67
Compu-Aire
10.0
BUILDING MANAGEMENT SYSTEM (BMS)
System 2500 controller is capable of communicating with external remote
B
uilding
M
anagement
S
ystem (BMS). Supporting protocol is enabled by a plug-in communication card.
Figure 24 - Building management system
Figure 25 - Communication protocol
Protocol
Description
Default Baud Rate
Modbus
Serial communication through RS-485
19,200
LONWorks
LONTalk communication
4,800
BACnet MS/TP
BACnet over MS/TP
4,800
BACnet TCP/IP
BACnet over TCP/IP, SMNP, HTML, FTP
19,200
CONTROLLER controller also features an alternative method of networking multiple cooling unit
in a built in standalone cLAN network through terminal
J11
. Baud Rate setting under BMS menu
is only applied for Modbus protocol. Other protocol required separate software interface.
Consult factory for more information.
Default Setting:
Unit Identification: 1
Baud Rate: 19200
Protocol: Modbus
10.1
Modbus
The CONTROLLER controller supports an optional RS-485 card, which allows you to interface
directly the controller to a supervisory network RS485. The max baudrate available is 19200 baud
(it can be set by software).
10.1.1
Mounting
To install the card in the pCO unit follow these instructions:
1.
Remove the "serial card" placement cover with a screwdriver.
2.
Remove the pre-punctured plastic piece corresponding to the card being installed.
3.
Insert the optional card into the corresponding connector; confirm the card is firmly
placed on both plastic supports on the controller case.
4.
Close the cover using the screwdriver making sure the outside card terminal fits within
the punched hole made on the cover.
