Measurement Computing StrainBook/616 - Manual (Page 66)

StrainBook’s upper circuit board (see preceding figure) is used to:
• Customize low-pass filter frequencies using resistor networks
• Install Bridge completion resistors
• Install Shunt calibration resistors
A fan draws air through the unit and exhausts it through the side. To maintain
sufficient cooling, it is important to keep the fan and vents free of obstruction.
CN-115 Headers, Associated Jumpers, and Plug-In Options
Each channel has a CN-115 2x8 resistor socket header and two associated jumpers (JP101 and JP102) located
on the StrainBook’s main board. The jumpers, associated with a given channel, must be installed if a CN-115
will be used for that channel. The associated jumpers must be removed if a CN-115-1 or a WBK16/LC option
will be used for configuring a channel.
Installing a CN-115-1 or a
WBK16/LC (Note A)
StrainBook jumpers must be
removed for CN-115-1 and
WBK16/LC.
CN-115-1 is a removable plug-
in board that can be pre-
configured for various bridge
options. It differs from the
CN-115 only in form factor.
WBK16/LC can be used for
virtually all single value shunt
calibration requirements, some
of which are not possible with
the internal FET/analog switch
provisions in the standard
channel configurations.
Installing a CN-115 (Note B)
StrainBook jumpers must be
installed for CN-115.
CN-115 is a removable plug-
in adaptor that can be pre-
configured for various bridge
options. It differs from the
CN-115-1 only in form factor.
Installing a CN-189 (Note C)
CA-189 is an external screw-
terminal option. It can be
used in conjunction with a
CN-115 or a CN-115-1. If
used alone (without either
plug-in) the associated
channel jumpers must be
installed in the default
position.
When installing a plug-in device, be careful to avoid bending the pins and ensure that the option
is correctly oriented. Information for these options can be found using the reference notes below.
Note A - The Note A region represents a CN-115-1 or a WBK16/LC option plugged into the board’s CN-115
header for channel 1. The dashed-rectangle indicates the relative size and orientation of these options. For
both the CN-115-1 and the WBK16/LC the two jumpers (left edge of header) must be removed.
Note B - The CN-115 plug-in adapter fits directly over the header. When using a CN-115 the two jumpers
(left edge of header) must be installed as indicated in the figure.
Note C - The CN-189 includes two 7-pad jumpers and a 9-slot screw-terminal block. With use of the terminal
block and appropriate shorting of jumper pads, the user can easily configure the option to utilize the
components of an installed CN-115 or CN-115-1. The CN-189 screw-terminal option plugs into a DB9
connector.
Reference Notes:
Schematics of various bridge configurations can be found on pages 6-8 through 6-11.
These configurations apply to both the CN-115 and the CN-115-1.
The WBK16/LC Load Cell Shunt Cal Internal Option is discussed on page 6-15.
The CN-115-1 User-Configurable Plug-In Card performs the same function as the
CN-115 Header Plug-in Option. CN-115-1 is discussed on page 6-20.
DB9 connector information, including use of the optional CN-189 adapter, begins
on page 6-12.
6-2 Bridge Configurations 929494 StrainBook/616 User’s Manual