ISO-STIM 01D User Manual
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version 4.3
page 11
OPERATION IN THE 10 mA (max.) RANGE
According to Ohm’s law, with 100 V voltage 10 mA current can be achieved
only
if the
resistance of the stimulus electrode is not higher than 10 k
. Otherwise the current will be less.
The output is short-circuit protected with a 1 k
resistor. This implicates that when using low
resistance stimulation electrodes with high current flow, there is a voltage drop at this resistor.
CAUTION
: This means that in voltage operation mode the output swing is reduced due to the
voltage divider between the electrode resistance and the protection resistor.
4.4. ISO-CAB (optional accessory)
npi provides an optional shielded cable for connection of stimulation electrodes. One end is
equipped with three color coded 4 mm connectors. The red and black connector are connected
to the ISOLATED OUTPUT connectors on the front panel of the ISO-STIM-01 D. Each of
these stimulation lines has a shield which is connected to the common green SHIELD
connector. To reduce noise during recordings, this connector can be connected to the CHASSIS
connector at the ISO-STIM-01 D front panel
The other end of the cable provides open wires, to which different connector types can be
soldered by the user. The red cable is +STIM, the yellow cable is –STIM. The shield is present
as bare wire. Usually, these shield wires are left unconnected on this end of the cable.
Figure 2: ISO-CAB - shielded cable for connection of stimulation electrodes.
