# Control Pin OC?

**URL:** <https://forum.digikey.com/t/control-pin-oc/67376>\
**Category:** Q&A\
**Created:** [April 1, 2026, 3:10pm UTC](https://forum.digikey.com/t/control-pin-oc/67376 "2026-04-01T15:10:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![albin.alex](https://avatars.discourse-cdn.com/v4/letter/a/c5a1d2/32.png) [@albin.alex](https://forum.digikey.com/u/albin.alex)\
**Post date:** [April 1, 2026, 3:10pm UTC](https://forum.digikey.com/t/control-pin-oc/67376/1 "2026-04-01T15:10:13Z")

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------Question for T31SN24005NMFA Please Put your question below------

Hello, I want to use the control pin, but I only have the capabilities to connect to ground. If the control pin is connected to ground, the converter will turn on since it is negative logic. But, if I were to leave the pin open, would the converter turn off?

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**Author:** ![David\_1768](https://sea2.discourse-cdn.com/digikey/user_avatar/forum.digikey.com/david_1768/32/9762_2.png) [@David\_1768](https://forum.digikey.com/u/David_1768)\
**Post date:** [April 1, 2026, 3:25pm UTC](https://forum.digikey.com/t/control-pin-oc/67376/2 "2026-04-01T15:25:52Z")

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Hello albin.alex,

Welcome to the DigiKey TechForum.

In the example you posted, the converter would shut off, when disconnected.

The datasheet says for the Negative logic version, you can have a switch between the On/Off remote terminal and the Vi(-) terminal. It turns the module on when the external switch is on, and it will be off when the external switch is off and floating.