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QUANTUM™ LX COMPRESSOR CONTROL PANEL
COMMUNICATIONS SETUP
090.020-CS (JUNE 11)
Page 111
COM-1 AND COM-2 DESCRIPTION
The board pictured on this page has two RS-422 se-
rial communications ports, labeled P10 (Com-1) and
P11 (Com-2). They can be used for external commu-
nications to the outside world.
COM-3 DESCRIPTION
Com-3 is labeled as P16 and is used for RS-485 hard-
ware protocol, and can be used in addition to any of
the other communications ports that may be being
used.
COM-4 DESCRIPTION
Com-4 (RS-485) is dedicated to providing communi-
cations to the DIgital and Analog boards, and will be
explained in the section entitled
Com-4 Description
.
Q5 SERIAL COMMUNICATIONS HARDWARE
Q5 GENERAL DESCRIPTION
User connections for serial communications to
and from the Q5 are located on the Interface
board, and can use RS-422 and/or RS-485 hard-
ware protocol. These hardware protocols can be
connected via Com-3 and Com-4 for RS-485,
and Com-1 and Com-2 for RS-422.
As mentioned in the previous paragraph, the
user connections for the serial communications
portion of the Q5 controller consists of an Inter-
face board, mounted below and to the right of
the main controller. In addition to external forms
of serial communication (to be discussed short-
ly), the keypad also connects here:
COM-4
(RS-485)
COM-3
(RS-485)
COM-2
(RS-422)
COM-1
(RS-422)
Keypad
C
ommunications Ports on the Q5 Interface
Board
Summary of Contents for QUANTUM LX
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