Specifications

Rev 1.0 1/27/14 15
3. Interfaces
This section describes the different interfaces that connect with the USR3500. The
modem comes with the following interfaces:
• 10-pin Micro-Fit Connector
• USB Interface (mini-B connector)
• 15-pin Sub-D Serial Interface
• Main RF Interface
• Secondary RF Interface
• GPS RF Interface
• SIM Interface
• LED Status Indicator
3.1. Front Interface
Figure 4. Front Interface
3.1.1. Power Supply Connector
The power supply connector is a 10-pin Micro-Fit connector that is used for:
• External DC Power Supply connection with voltage from +4.75V to +32V, at
3.7A
• GPIO connections and GPIO voltage reference
• ON/OFF pin to power OFF the modem
• Interrupt pin
Mini-B USB
Interface
15-pin Sub-D Serial Interface
10-pin Micro-Fit
Connector