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3.2 DEVICE INSTANCE
It is possible to install 16 3420 AC Monitors on a NMEA2000® network so they need to each have
a unique Device Instance Address. The Device Instance of each unit is set by turning the small
rotary switch with a small screw driver. Valid Device Instances range from “0” through to “F”.
NMEA2000® Parameter Group Numbers (PGNs)
Note: The “line to line” voltage values on PGNs PGN127747, PGN127748 and PGN127749 are
calculated from “line to neutral” voltage (not available on single phase, VLL = VLN • 2 for
2-phase and VLL = VLN • for 3-phase setup).
Note: The frequency values on PGNs PGN127747, PGN127748 and PGN127749 are the same as the
system frequency. They are not measured on each phase separately.
Note: The power values on PGNs PGN127744, PGN127745 and PGN127746 are calculated from
the measured voltage and current values (P = U • I).
Type
PGN No
PGN Name
Monitor
PGN127744
AC Power / Current- Phase A
PGN127745
AC Power / Current- Phase B
PGN127746
AC Power / Current- Phase C
PGN127747
AC Voltage / Frequency-Phase A
PGN127748
AC Voltage / Frequency-Phase B
PGN127749
AC Voltage / Frequency-Phase C
Protocol
PGN126464
Tx/Rx PGN List
PGN126996
Product Information
PGN126998
Configuration Information
PGN059392
ISO Acknowledge
PGN059904
ISO Request
PGN060928
ISO Address Claim
PGN126208
Command/Request Group
