Input voltage

[Chuck - Raymarine - Moderator]

Welcome back to the Raymarine Forum Greg,

With respect to electrical requirements, please note that voltage level alone is not the sole determining factor for operation of the MFD. The power requirements (P=IV) of the MFD must additionally be satisfied. Upon receiving this report, we tested an eS127 MFD within our offices using a variable voltage power supply and found the eS127 MFD to operate normally when supplied with voltage within the range 9.8V to 32.2V. However, the reported symptom may be encountered under the following conditions and may become more readily observed if the MFD's sonar is pinging:
- loose, corroded, or poor electrical power connections ... inspect from the MFD's power cable to the distribution / breaker panel to the batteries. Check the ground patch from the MFD's power cable to the batteries
- the gauge of the wire used supply power or ground to the panel and/or MFD are of insufficient grade ... click here to view a web page addressing wire gauge.
- weak battery(s) ... have the batteries load tested
- the regulated power supply cannot supply sufficient current to satisfy the power requirements of the MFD
- the MFD has suffered a failure of its circuitry ... recommend sending the MFD to Raymarine’s Product Repair Center to be bench checked / serviced.