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Chapter 3
SC-2071 Board
© National Instruments Corporation
3-7
SC-207X Series User Manual
Warning:
Do not connect the SC-2071 board to any device other than a National
Instruments Lab/1200 device or the SC-2053 cable adapter board. The SC-2071
board is not compatible with any other DAQ devices or cable adapter boards.
Attempts to use the SC-2071 board with products for which it was not intended
can result in damage to the SC-2071 board, the DAQ device, or the host
computer. National Instruments is
NOT
liable for damages resulting from these
connections.
The SC-2071 board uses a 50-pin ribbon cable connector to connect to the 50-pin I/O connector
on either a Lab/1200 device, an SC-2053 cable adapter board, or the BNC-2081 analog breakout
board. If the SC-2053 cable adapter board is being used, the SC-2053 connects to the DAQ
device with a 50-conductor ribbon cable. The SC-2071 board then connects to the other 50-pin
I/O connector on the SC-2053. If you are using the BNC-2081 analog breakout board, connect
the BNC-2081 to the SC-2071 board with a 50-conductor ribbon cable. Make sure you do not
connect voltage signals to the same analog input or analog output channels on both the SC-2071
and the BNC-2081. For more information, see Chapter 5, Installation and Connections.
Mounting
The SC-2071 board is equipped with metal standoffs so the board can be placed on a workbench
near the host computer. You can use an optional rack-mount chassis, which can be fitted with a
flat, acrylic plastic cover. When the SC-2071 board is mounted in the chassis, the board can be
grounded to its metal standoffs, and therefore to the rack. For more information, see Chapter 5,
Installation and Connections.
Applications
The open component positions on the SC-2071 board make adding signal conditioning
components to the analog input signals easier. Several applications are covered in this section,
including thermocouple readings, filtering, and attenuation.
The figures in this section give examples on a specific input channel. To install the circuit on a
different channel, consult Table 3-1 to determine the equivalent component positions for the
other channels.
Soldering and Desoldering on the SC-2071 Board
With the applications discussed here, you must modify the printed circuit board, usually in the
form of removing jumpers and adding components. The SC-2071 board is shipped with one
jumper in the C position (see Table 3-1 and Figure 3-2). Use a low-wattage soldering iron (20 to
30 W) when soldering to the board. To desolder on the SC-2071, vacuum-type tools work best.
Use care when desoldering to avoid damaging component pads. Only use rosin-core electronic
grade solder. Acid-core solder damages the printed circuit board and components.
Summary of Contents for SC-207 Series
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