Table of Contents
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More follows in the manual. One thing SG is not sure of is how the ground wire from the external power supply gets connected?
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Pin Designations from the Galil Manual (page 97)
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Schematic Layouts for TTL-Based Devices in KPF
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The same Galil is used for the Ca H&K exposure control. Since similar (and fewer) devices are being controlled by the Galil for that system, ideally the same PCB could be utilized, with just some of the pins going unused.
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TTL Details per Device
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Description | Device | Notes |
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Shutter Controller | Uniblitz VED24 | Screengrab from VED24 manual:  Note the VED24 manual is somewhat confusing about what the PULSE INPUT trigger needs. I clarified with Uniblitz and they replied with this description: “When the input signal goes Low [0V], the shutter will Open . The input signal should stay Low[0V] for the duration of the desired exposure time and be at least a minimum duration of the pulse width needed to make sure that shutter will properly ‘Open’ for the VED24. In the case of the DSS25B series shutter the minimum exposure pulse would need to be greater than 35ms. When the input signal is removed and/or return to the High[5V] state the shutter will close. The shutter will stay in the Close position until the Pulse Input signal goes Low[0V]. The VED24 Driver, when configured for the appropriate shutter device, will provide the fixed pulses need to ‘OPEN/CLOSE” the bi-stable shutter. Let me know if I can be of any further assistance.” Regards, Adam J. Lamb |
Ca HK Detector | Andor Newton | Screengrab from Andor Newton manual:  |
Archon Controller | STA Archon | From the Archon manual: “The Trigger In circuit is shown in Figure 4. A 3.3V input at 2 mA is sufficient to trigger the optoisolator. Inputs up to 10V are tolerated.” |
Exposure Meter | SBIG Aluma 47-10 |  |
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