Ametek 931S

3-18 | Model 931S / Model 932S UV Analyzers
If using the Remote Service Port (RS-485), you must configure it for
Full-Duplex (4-Wire) or Half-Duplex (2-Wire) – see “Remote Service Port
RS-485, Full/Half Duplex” below, and Figures 3-5/3-6.
The RS-485 Remote Service Port can also be used for customer service,
but not at the same time as the RS-232 Digital Communications Port.
If the system is configured for RS-485 2-wire communication using
the S93XS System 200 Configurator Software, a RS-485-to-RS-232
convertor – which uses the Automatic Transmit Enable (or Send Data
Control) function – must be used.
Remote Service Port RS-485, Full/Half Duplex
(Service RS-485 JP304)
To congure Set jumper JP304 to
the analyzer for: this position:
Full-Duplex (4-Wire) 1-2
Half-Duplex (2-Wire) 2-3
The Customer Data Acquisition Port (Modbus Communication) is ac-
cessed via J302 on the Host Controller (Lower Enclosure). This line can
be configured as Full-Duplex (4-Wire) or Half-Duplex (2-Wire) – see
“Customer Data Acquisition Port RS-485, Full/Half Duplex” below, and
Figures 3-5/3-6.
If your system is configured to communicate through the RS-485
Customer Data Acquisition Port (Modbus Communication),
you cannot communicate with the analyzer through the RS-232
Communications Port unless you stop polling from the Customer
Data Acquisition Port.
Customer Data Acquisition Port RS-485, Full/Half Duplex
(Customer RS-485 JP303)
To congure Set jumper JP303 to
the analyzer for: this position:
Full-Duplex (4-Wire) 1-2
Half-Duplex (2-Wire) 2-3
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