# Question on SparkFun OpenScale SEN-13261

**URL:** <https://community.sparkfun.com/t/question-on-sparkfun-openscale-sen-13261/69598>\
**Category:** Wireless & IoT\
**Created:** [September 22, 2026, 3:55pm UTC](https://community.sparkfun.com/t/question-on-sparkfun-openscale-sen-13261/69598 "2026-09-22T15:55:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![JaredHitzfield](https://avatars.discourse-cdn.com/v4/letter/j/dbc845/32.png) [@JaredHitzfield](https://community.sparkfun.com/u/JaredHitzfield)\
**Post date:** [September 22, 2026, 3:55pm UTC](https://community.sparkfun.com/t/question-on-sparkfun-openscale-sen-13261/69598/1 "2026-09-22T15:55:04Z")

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I have a SparkFun OpenScale SEN-13261. I want to connect six identical ATO S-type load cells through an ATO six-channel summing junction box. Each load cell has approximately 380-ohm input impedance, so the six parallel cells present approximately 63-ohm excitation resistance. Can the OpenScale safely and continuously excite this bridge load? What are the OpenScale’s maximum load-cell excitation current and minimum supported bridge resistance?