# RS232 connection to ME

**URL:** <https://forums.digi.com/t/rs232-connection-to-me/4140>\
**Category:** Plug N' Play\
**Tags:** hardware\
**Created:** [September 27, 2004, 4:29pm UTC](https://forums.digi.com/t/rs232-connection-to-me/4140 "2004-09-27T16:29:06Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Jan](https://avatars.discourse-cdn.com/v4/letter/j/ce7236/32.png) [@Jan](https://forums.digi.com/u/Jan)\
**Post date:** [September 27, 2004, 4:29pm UTC](https://forums.digi.com/t/rs232-connection-to-me/4140/1 "2004-09-27T16:29:06Z")

</div>

Page 68 of the Harware Reference Manual shows how to connect to RS232. The connector states DIGI ONE EM. All devices are 5 Volt. How do all this relate to the 3.3 Volt DIGI ME? Is there a 5 Volt ME?