Serial Port Connections - York YCAV0157-0267 Installation Operation & Maintenance

TABLE 20 lists the serial ports and the circuit board
they are located on. The serial communications lines
provide communications to external devices outside
the chiller and between microprocessors located in the
chiller control panel.
TABLE 20 - SERIAL PORT CONNECTIONS
BOARD
Chiller Control Board
Chiller Control Board
VSD Logic Board
TB2 allows connectiong to a remote OptiView RCC
or Microgateway. The OptiView RCC option is not yet
available. The OptiView RCC and Microgateway option
cannot both be used. Only one or the other is permitted
to be connected to the chller.
JOHNSON CONTROLS

SERIAL PORT CONNECTIONS

HEADER PORT TYPE
TB1 / TB2 RS-232 / RS-485
J2 / J1
J12 Opto- Coupled RS-485
Printer/RCC and ISN
RS-485 Control Panel <-> VSD #1 / #2
VSD <-> Control Panel
FORM 201.21-NM1 (616)
PORT USE
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