# XBP24CZ7UIT-004   (S2B)  vs XB24CZ7UIT-004  (S2C) pin drop problem

**URL:** <https://forums.digi.com/t/xbp24cz7uit-004-s2b-vs-xb24cz7uit-004-s2c-pin-drop-problem/18398>\
**Category:** XBee & XBee Gateway\
**Tags:** s2b, s2c, digi, xbee\
**Created:** [May 31, 2017, 10:42am UTC](https://forums.digi.com/t/xbp24cz7uit-004-s2b-vs-xb24cz7uit-004-s2c-pin-drop-problem/18398 "2017-05-31T10:42:10Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kunalbarot](https://avatars.discourse-cdn.com/v4/letter/k/9dc877/32.png) [@kunalbarot](https://forums.digi.com/u/kunalbarot)\
**Post date:** [May 31, 2017, 10:42am UTC](https://forums.digi.com/t/xbp24cz7uit-004-s2b-vs-xb24cz7uit-004-s2c-pin-drop-problem/18398/1 "2017-05-31T10:42:10Z")

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Hi Digi

WE are using Digi product XBP24CZ7UIT-004 (S2B) in our product. When we replace this module with XB24CZ7UIT-004 (S2C) we got problem of receiving data, module does not respond after power up. It only respond once we reset it via command or via hardware reset.

I think both module are pin to pin drop compatible , please confirm.

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**Author:** ![mvut](https://sea2.discourse-cdn.com/flex016/user_avatar/forums.digi.com/mvut/32/31_2.png) [@mvut](https://forums.digi.com/u/mvut)\
**Post date:** [May 31, 2017, 10:50am UTC](https://forums.digi.com/t/xbp24cz7uit-004-s2b-vs-xb24cz7uit-004-s2c-pin-drop-problem/18398/2 "2017-05-31T10:50:29Z")

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With respect to VCC, GND, DI and DO, that is correct. They are pin for pin compatible.