![](/manual/salutron/hrm3300/user-s-manual-english-french-somali/images/img-5.png)
CONFIDENTIAL
Copyright 2016, Salutron, Incorporated Revision 1.1 Revision Date:07/31//17 Page: 5 of 23
Physical Dimensions: Inches (mm)
Figure1:Physicaldimensions
Connection Diagram: (Typical)
TYPE PIN No. DESCRIPTION
J1 – Main
1 GND
2 VCC
3 TXD
4 RXD