Stimulus Isolation Unit (SIU-202)

The SIU-202 is ideal for providing stimulation when stimulus artifacts must be kept to a minimum, such as in nerve or muscle research.

This instrument features optical isolation at the input, and a battery powered constant current delivery circuit. Timing pulses can be controlled by any device capable of generating a TTL level positive pulse (for example, a computer with data acquisition).

On the rear of the instrument are two TTL inputs; one comprising a standard BNC input, the other using an optional fiber-optic converter box. The fiber-optic eliminates all grounded connections to the SIU-202.

Output amplitude is set using a range-mode switch in conjunction with a ten-turn potentiometer to set a percentage of the selected range. The constant current output features 100 volt compliance with a LED over-voltage indicator. The compliance voltage may also be set to a lower voltage by simply reducing the number of 9 volt batteries installed.

A low battery light provides advanced notice of battery status and ultra low power electronics provide up to 250 hours of operation with a 2 mA output setting.

Output connection is via the panel-mounted 5-way binding posts, (banana jacks).