Chapter 5: Usr3520/Usr803520 Technical Specifications; Physical; Serial Port Ratings; Power - US Robotics USR3520 User Manual

Chapter 5: USR3520/USR803520 Technical Specifications

Physical

 1 Main Antenna Connection: 50 Ohm SMA female (WWAN Main)
 1 Diversity Antenna/GPS Connection: 50 Ohm SMA female (WWAN Div / GPS)
 1 10/100 Mbps RJ45 Connector
 1 Power connector: 4 pin Micro-Fit™ 3.0, dual row, 2 circuits
 7 3-color LEDs showing system status and signal strength
 1 reset switch
 1 internal SIM slot (1.8V/3V) - USIM/SIM Class B and Class C
 DTE interface: 1 RS-232 DB9 Male connector
 DCE interface: 1 RS-232 DB9 Female connector
 2 LEDs indicators: system connect status, operating mode
 1 mode switch: Modemulator/Gateway

Serial Port Ratings

 Terminal Port RS-232C DCE: Auto-baud detection of 115200, 57600, 38400, 19200, 9600, 4800,
2400, 1200, and 300 bps
 Modem Port RS-232C DTE: 115200, 57600, 38400, 19200, 9600, 4800, 2400, 1200, and 300 bps

Power

The symbol on the label at the bottom side of the gateway shows the power requirements:
 Input voltage must be between 9V - 33V DC
 Internal electronic fuse limits the input current to 1.2A
 Attached to 3G network, no Ethernet, 3G call @ 2100MHz (band I): 361mA
(All power measurements at 12V DC)
USRobotics recommends using a power cable between the external power supply unit and
the gateway that has a wire thickness of 22 AWG!
Modemulator User Guide
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