SSR switching for 6-pin 12V light tester: high-side + low-side options?

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baileyw5206
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SSR switching for 6-pin 12V light tester: high-side + low-side options?

Post by baileyw5206 »

Hello Phidgets folks,

I am working on a Windows/C# controlled production light tester and wanted to ask which Phidgets SSR products would make the most sense.

The tester has a 6-pin connector. For each test step, I plan to connect one selected pin to power and another selected pin to ground while the unused pins remain floating. These pins vary per light, so I need the relays to arbitrarily route power and ground. I need at least 6 high-side switches and 6 low-side switches.

The load is 12V DC. The vast majority of lights are under 2A, but some may approach 6A total. Only one HIGH/LOW path is active at a time, but the system does hot-switch the load and may switch thousands of times per day, so I'm obviously trying to avoid mechanical relays.

I noticed the REL1101 is a 16-channel SSR board, but it appears to be low-side/shared-ground only. That seems usable for the 6 low-side switches, but not the 6 high-side switches (a version of this board where half the pins were high-side would be very useful! :D )

My current thought is:
REL1101 for the 6 low-side connections (cheaper than 6 REL2103s) +
6× REL2103 for the 6 high-side connections +
2x VINT hubs controlled from the Windows C# app

Does that sound like the right Phidgets approach for this application? Let me know if you think there might be a better approach.


Thank you.