The SH-2 shutter card allows you to control the operation of two ASI shutters, and takes up a single slot in the PWR-ASI-6 power supply. Typically the SH-2 is used along with other modules, such as the FW-1000 filter wheel controller.
Shutters connected to the SH-2 can be controlled with the front panel toggle switch, with TTL inputs via BNC connectors on the front panel, by a foot switch connected to the same BNC connectors, and with RS-232 commands via the FW-1000 filter wheel controller (if one is installed in the same cabinet with the SH-2).
Specifications*
| Methods of Control |
Serial Interface,
TTL or Footswitch,
and Front Panel
Toggle Switch |
| Number of Shutter Channels per Card |
Two |
| 0%-to-100% Opening Time from Trigger (N.C. shutter) |
8 ms |
| 100%-to-0% Closing Time from Trigger (N.O. shutter) |
7 ms |
| Minimum 50%-to-50% Open Time (N.C. shutter) |
5 ms |
| Minimum 50%-to-50% Closed Time (N.O. shutter) |
13 ms |
| Minimum Total Window 0%-to-0% |
14 ms |
| Minimum Trigger Width |
7 ms |
| Peak Unsustained Repetition Rate |
40 Hz |
| Maximum Sustained Repetition Rate |
5 Hz |
* using 25 mm aperture shutters equipped with standard black Teflon® coated shutter blades.
