When planning to use Dual-Well Shared Wiring consider the following:
- If a board requires a safety shroud and interlock due to explosive devices or dangerous voltages, all boards wired in parallel with that board must be covered by the same shroud. This makes it impossible for an operator to change one board while another is being tested.
- Ideally, power nodes should not be wired in parallel. If there are enough DUT supplies in the test system, specify independent wiring for power supply nodes. If there are not enough DUT supplies, or if you are using Throughput Multiplier, you can use parallel wiring; however, the software does not provide wiring instructions. Wiring parallel power supply nodes is a manual task.
- The parallel wires on nodes for the board(s) not being tested might affect the tests for the board being tested. You can specify the appropriate nodes to be wired independently.
- Increased ringing might cause latching of CMOS devices.
- Double clocking might decrease the reliability of digital timing tests. You can specify that the applicable nodes be wired independently instead of in parallel.
- Remote sensing might be degraded for sensitive analog measurements. You can specify that the applicable nodes be wired independently instead of in parallel.
- Any board that has independently-wired nodes requires a different board type; you need to enter such boards as a different type in the panel definition form and edit the node names in the board description.
- GP relays are wired in parallel for common named nodes. If you need independent GP relays, specify unique node names for the appropriate nodes.
- Remember that Throughput Multiplier supports only single-board-type panels.
- Because only one parallel-wired board can contact the fixture probes at any one time, special considerations must be taken into account with automation systems.
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