FieldServer FS-8700-80 - Manual (Page 5)

McQuay Micro Tech Open Protocol Driver Manual Page 5 of 43
FieldServer Technologies 1991 Tarob Court Milpitas, California 95035 USA Web: www.fieldserver.com
Tel: (408) 262 2299 Fax: (408) 262 2269 Toll Free: (888) 509 1970 email: [email protected]
1.1.3 McQuay MicroTech network products used in conjunction with the driver:
1.1.3.1 MicroTech BACdrop™ panel
The MicroTech BACdrop gateway integrates a MicroTech network into a BACnet™ building automation system
(BAS) facilitating monitoring and control of McQuay International equipment from the BAS. The gateway
translates between BACnet objects on an Ethernet® network and McQuay memory locations on a proprietary
MicroTech network.
The BACdrop gateway is a passive device. It receives, translates, and re-transmits messages including both data
and control signals from one network to the other network in either direction but does not perform any
supervisory control for the various MicroTech controllers connected to it. Figure 1 shows the important features
of the BACdrop panel.
Figure 1. BACdrop Panel
CB
PS
SBC
J1 connector
RJ-45
J22 L2 L1
G
R D
“Ethernet” port
“Network” port
“PC” port
Flas h m em ory chip
Ethernet status LEDs
Speaker
5 Vdc power in
1.1.3.2 OPM – Open Protocol Master Panel
The OPM Panel is used when two or more MicroTech controllers need to be interfaced with a BAS by means of a
single-point connection. The OPM acts as a passive communications link between MicroTech controllers and the
BAS and does not perform any supervisory control for the various MicroTech controllers connected to it. When an
OPM is used, all supervisory control (scheduling, overrides, chiller sequencing) is handled by the BAS. The
maximum number of unit controllers per OPM depends on the BAS. For example, the OPM Panel could combine a
McQuay centrifugal chiller, a McQuay applied rooftop unit, and several unit ventilators into a network that a BAS
could connect to with a single cable. Figure 2 shows the important features of the OPM panel.