
311
JOHNSON CONTROLS
FORM 201.21-NM3 (616)
8
SERIAL PORT CONNECTIONS
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
HEADER
PORT TYPE
PORT USE
Chiller Control Board
TB1 / TB2
RS-232 / RS-485
Printer/RCC and ISN
Chiller Control Board
J2 / J1
RS-485
Control Panel <-> VSD #1 / #2
VSD Logic Board
J12
Opto- Coupled RS-485
VSD <-> Control Panel
TB2 allows connecting 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 chiller.
Содержание YCAV0267E
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Страница 63: ...63 JOHNSON CONTROLS FORM 201 21 NM3 616 ELEMENTARY CONTROL WIRING DIAGRAM 3 COMPRESSOR CON T LD12552 ...
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