Product specifications

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2) PCON - PC Connection:
The PC Connection program provides communications for complete operation of the packaged chiller includ-
ing graphing information. This option is available through two communications techniques as follows:
a) PCCB (Basic) (Figure 6b)
The standard communications for PCCB is via the RS232 connection which may be as far as 100 feet (30
meters) away from the packaged chiller. Only one chiller can be accessed
Figure 6b
b) PCCE (Enhanced) (Figure 6c)
The enhanced PCCE system allows for communications via the RS485 port and can be located as far as
6000 feet from the packaged chiller(s). This option requires the addition of a gateway to convert the
RS485 port back to a RS232 port and then may be connected to a modem or directly to a PC. One
additional feature is that you may field install a manual AB switch, which allows switching between a local
PC and a modem.
Figure 6c
As can be seen, the microcomputer system allows for a variety of remote connection capabilities for almost infinite
flexibility. Utilizing the PC connection program, up to twenty packaged chillers connected via the RS485/RS232 ports
can be monitored. The user may then select whichever packaged chiller to review.
Remote Monitoring
The Microcomputer is equipped with a high speed RS232 communications port and two high speed RS485
communications ports, to allow for a variety of different remote monitoring operations. The RS232 communications
port allows for remote communications at distances of up to 100 feet over a 4-wire shielded cable. The RS485
communication system allows for remote communications at up to 6000 feet (1829 meters) with a 2-wire shielded
cable connection.
1) RMCT - Remote Mounted Control Terminal (Figure 6a)
This Remote Mounted Control Terminal (RMCT) is a stand alone Control Terminal to communicate and control
the unit from a remote location up to 6000 feet (1829 meters) away, via the 485 communications port, when
wired with a 2-wire shielded cable. The RMCT will then operate just like the controller in the unit. This enhanced
version of the Remote Mounted Control Terminal with 8 relay outputs and 8 sensor inputs provides remote
alarm capabilities and additional sensor inputs as may be required.
Figure 6a
UNIT
CONTROLLER
REMOTE CONTROL
TERMINAL
RS485 — UP TO 6000 FEET (1829 METERS) AWAY
RMCT
REMOTE MOUNTED
CONTROL TERMINAL
➙
UNIT
CONTROLLER
RS232 — UP TO 100 FEET (30 METERS) AWAY
Local PC with
Windows® & PC-CONN
UNIT
CONTROLLER
RS485
UNIT
CONTROLLER
UNIT
CONTROLLER
Local PC with
Windows® & PC-CONN
RS485
MSC 485
GATEWAY
RS485
RS232