4.5.3 User Wiring Interfaces
The cryostat provides integrated connectors for user DC feedthroughs and user thermometers and
heaters.
Do NOT remove sample chamber circuit boards
• The standard 4 K circuit board “wedge” (contains USER, SAMPLE THERM, etc.) available on some
models (s100 & s200) should not be removed, as it can lead to the disconnecting of the platform
thermostat and heater. If this wedge needs to be removed for any reason, please contact an
authorized service representative for detailed instructions.
• The black printed circuit board on the s50 model should not be removed. The black Delrin screws
holding it in place should remain loose. Overtightening can cause the board to flex and make it
difficult to obtain a proper vacuum seal.
• The Operational wiring and cables must remain connected for the system to be operational. Do
NOT modify these connections.
User DC Connections
User DC connections allow users to route wiring to header pins on the sample chamber circuit board.
These available connections can be used to interface with external connections and devices. The
accessory kit comes with pin connectors for interfacing user inputs to the external connectors.
User Temperature Channels
User thermometer and heater connections allow users to add additional thermometers and heaters at
header pin locations on the sample chamber circuit board. The system control unit provides open
temperature channels (User 1 & 2) for manually controlling additional thermometers and heaters via
the UI.
The provided sample thermometer is symmetric, so it can be connected to Pin 1 in either orientation.
4.5.4 Wiring Schematics
The wiring schematics for each model are outlined on the following pages.
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