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.
- Constant current in 3 ranges up to 10 mA
- 100 volt compliance with LED indicator
- Optical coupling isolates stimulator from pulse source
- Battery powered for low noise recording applications
- Compatible with electrophysiological applications
- Variable compliance voltage feature
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).
Specifications |
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Output Waveform | Current Pulse |
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Output Current Ranges | 0.1, 1.0, and 10.0 mA |
Output Compliance | 100 V |
Output Polarity | Selected by Mode Switch |
Amplitude Control | Multi-turn dial |
Input Pulse Requirements | TTL level, positive pulse 3 volt, 1 mA minimum |
Input Pulse Timing | 100 ìs minimum pulse width |
Input Connector | BNC, optional fiber-optic |
Input Isolation | 5,300 volts rms |
Isolation Resistance | 1012 Ω |
Output Connector | 5-way binding posts (Banana Jacks) |
Power Requirements | 16 - 9 volt alkaline batteries |
Physical Size, H x W x D | 4.5 x 15.9 x 27.9 cm |
Shipping Weight | 3 kg |
Warranty | One year, parts and labor |
DOCUMENT | DESCRIPTION |
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SIU202_1.pdf | SIU-202 Manual |