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Figure 2–1
Connecting a front-end to
the PowerLab: a PowerLab
2
has only one I
C output,
and each front-end has one
2
2
I
C output and one I
C input
22
Connecting to the PowerLab
To connect a front-end to the PowerLab, first ensure that the PowerLab is
turned off. Failure to do this may damage the PowerLab, the front-end, or
both.
Connect each signal output on the rear panel of the Bio Amp, Dual Bio Amp
or Octal Bio Amp, to an analog input on the front panel of the PowerLab
using a BNC cable. If the PowerLab has differential (rather than single-ended)
inputs the BNC cable must connect to a positive analog input of the
PowerLab. ADInstruments applications will not find the front-end on starting
up if a negative input is used.
2
Connect the I
C output of the PowerLab to the I
2
using the I
C cable provided. Figure 2–1 shows how to connect up a single
front-end to your recording unit.
2
Front-end I
C input
2
I
C connector
cable
Check that the plugs for the I
cable for firm connections as well. Loose connectors can cause erratic front-
end behavior, or may cause the front-end to fail to work at all. The BNC cable
can be tucked under the front-end to keep it out of the way if desired.
Multiple separate front-ends can be connected to a PowerLab. The number of
front-ends that can be connected depends on the number of input channels
on the PowerLab, since each signal output from the front-ends connects to
one of the analog inputs of the PowerLab.
Only one front-end such as a Stimulus Isolator can be connected to the
(positive) output of the PowerLab. The initial front-end should be connected
BNC connector cable
Front-end Signal Output
2
PowerLab I
C output
2
C bus are screwed in firmly. Check the BNC
2
C input of the front-end
Bio Amp Owner's Guide
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