| UNAVCO
 


Knowledge Base

Trimble NetR5, NetR8 and NetR9 - Critical Power-On/Off Configuration Details

NetR5, NetR8, and NetR9 hardware requires that Power On and Shutdown Voltages be properly configured to ensure proper functionality when used with DC power systems. 

UNAVCO has determined, and Trimble has confirmed, that a NetR5, NetR8, or NetR9  configured with a Power On Voltage that is not more than 1 Volt greater than the Shutdown Voltage will not power on as programmed under certain circumstances.  UNAVCO suggests that a minimum separation of 1.3 Volts be used.

These settings are found in the "General" submenu of the "Receiver Configuration" menu of the web interface.  UNAVCO recommends the following configurations, depending on the type of Charge Controller being used:

1.  If a Charge Controller without a Low Voltage Disconnect (LVD) is used:
Power On Voltage: 12.50V
Shutdown Voltage: 11.00V





2.  If a Charge Controller WITH an LVD is used:  identify the voltage thresholds of the LVD and set the receivers voltages below each of them.  A commonly used controller - the Flexcharge NC30 - will disconnect the load when battery voltage drops below 10.9V and reconnect at 12.9V.  The NetR9 should then be set to:
Power On Voltage: 12.80V
Shutdown Voltage: 10.80V




Users should consider the effects of these settings on their power systems and may adjust them according to need, but should be careful to adhere to the minimum separations.  Please contact UNAVCO for advice and assistance testing individual configurations, and for further details.

While future versions of firmware may add enhancements to the user interface that will explicitly warn users of the configuration requirements and change the defaults accordingly, this is a hardware-based feature and will always be present in these receivers.

Attached Files
There are no attachments for this article.
Comments
There are no comments for this article. Be the first to post a comment.
Name
Email
Security Code Security Code
Related Articles RSS Feed
Trimble NetR5 - Dealer FAQ, February 2006
Viewed 1526 times since Tue, Aug 25, 2009
HOW TO SET UP A TRIMBLE NETRS AND NETR8/NETR9 FOR RTCM STREAMING OVER TCP/IP (NTRIP)
Viewed 6716 times since Mon, Dec 20, 2010
Trimble NetR5 - Release Notes v3.10, Rev. A, March 2006
Viewed 1547 times since Tue, Aug 25, 2009
DDoS Attacks on NTP Servers affecting some GNSS receivers
Viewed 12887 times since Thu, Feb 20, 2014
Trimble NetR9 Resource Page
Viewed 41191 times since Mon, Aug 17, 2015
Trimble NetR5, NetR8, and NetR9 Receivers: Hint for Using Web Interface With Slow Connection
Viewed 3830 times since Fri, Apr 29, 2011
Hardware Limitation of Trimble NetR5 and NetR8 GNSS Receivers
Viewed 19466 times since Fri, Feb 15, 2013
How to access Trimble NetR9 through USB
Viewed 6029 times since Tue, Aug 2, 2011
Trimble NetR9 power draw tests
Viewed 189 times since Thu, Jul 29, 2021
MENU
 

Last modified: 2019-12-27  16:36:35  America/Denver