Optional Equipment
NO2-to-NO Converters
Thermo Electron Corporation Model 42i Low Source Instruction Manual 9-3
NO
2
-to-NO Converters The Model 42i Low Source includes a Molybdenum NO
2
-to-NO converter
as standard equipment. A stainless steel converter is available as an option.
I/O Expansion Board
Assembly
The I/O expansion board connects to the motherboard and adds the
capability to input external analog voltage inputs and to output analog
currents via a connector located on the rear panel of the instrument. It
contains local power supplies, a DC/DC isolator supply, a sub-processor
and analog circuits. Eight analog voltage inputs are provided with an input
voltage range of 0V to 10VDC. Six current outputs are provided with a
normal operating range of 0 to 20 mA.
Terminal Block and
Cable Kits
The terminal block and cable kit provides a convenient way to connect
devices to the analyzer. The kit breaks out the signals on the rear panel
connector to individual numbered terminals.
Two types of terminal block and cable kits are available. One kit is for the
DB37 connectors and can be used for either the analog output connector or
the relay output connector. The other kit is for the DB25 connector and
can be used for the optional I/O expansion board. The parts available in
these kits can also be purchased separately.
Each kit consists of:
• one six-foot cable
• one terminal block
• one snap track
Note Supporting all of the connections on units with the optional I/O
expansion board requires:
two DB37 kits
one DB25 kit
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