Cameron NUFLO 1141C, User Manual

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Scanner 1141 Hardware User Manual
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RAM Size (CN11) This jumper determines how the system’s base 256 Kbytes of memory
is partitioned. Note the “high” and “low” markings on the circuit board
(Figure 3.6). Position the jumper across the top two pins to select the
“high” setting: position the jumper across the bottom two pins to select
the “low” setting.
“Low” is 64 Kbytes of RAM and 192 Kbytes of NVRAM.
“High” is 96 Kbytes of RAM and 164 Kbytes of NVRAM.
A superboot is required for a change in the RAM size jumper to
become effective.
Pulse Input A14 (SW1) SW1 is a six-position DIP switch that allows the user to configure the
desired electrical interface (Figure 3.6). Resource A14 uses terminals
49-50. If these terminals are not on the main board, the frequency
pulse input option is not installed. See
Frequency Pulse Input DIP
Switch Summary , page 44 , for DIP switch settings and wiring
diagrams for various electrical interfaces.
Analog Output Mode (CN3) CN3 is for an optional single 4-20 mA analog output (Figure 3.6). The
output is wired to terminals 39 and 40. If these terminals are not present
on the main circuit board, the 4-20 mA analog output option is not
installed. When the Scanner is turned off (and there is still power to the
loop) and the jumper is in upper (Zero) position, the output will go to
approximately 1 mA. With the jumper in the lower (Last) position, the
output will be held in the last known position.
FPGA Load Jumper (CN4) Jumper CN4 enables programming of the FLASH memory “boot”
block (Figure 3.6). This block contains 4 Kbytes of code used to
download the flow computer’s application, as well as 4 Kbytes of
memory used to define the operation of the FPGA (during application
downloading).
The CN4 jumper is set when the Scanner is
initialized at the factory and should not be changed.