Designed for use with Warner imaging chambers with field stimulation electrodes, the SIU-102 features optical isolation at the input and transformer isolation at the output. Timing pulses can be controlled by any device capable of generating a TTL level positive pulse – a computer with data acquisition, for example.

Positive or negative pulses, positive or negative DC, and bipolar pulses are possible in constant current or constant voltage delivery modes. For bipolar delivery, a positive pulse during the input pulse is followed immediately by a negative pulse of equal duration and amplitude. Bipolar pulse widths from 100 µs to 100 seconds per each polarity are possible.

Output amplitude is set using a range mode switch in conjunction with a ten-turn potentiometer to set a percentage of the selected range.

Indicator lights keep the user apprised of the following:
High voltage: Lights red when output voltage above 30 volts.
Compliance: Lights when impedance across output is too high for current setting.
T>100 Sec: Lights when pulse width input is longer than 100 seconds in Bipolar mode.
Ext. Trigger: Lights when a valid input is applied to the Pulse In BNC.