Appendix A - Nmea 2000 Interfacing - Maretron DCR100 User Manual

Appendix A – NMEA 2000
DCR100 NMEA 2000
PGN 127501 – Binary Switch Bank Status
The DCR100 uses this PGN to transmit the state of each of the connected switch inputs
Field 1: Indicator Bank Instance – This field identifies the particular switch bank to which this
PGN applies. Please refer to Section 2.5.3 for instructions on how to program the
value of this field.
2: Indicator #1 – This field indicates the state of the solid-state relay between the power
source connected to P1 terminal and the load connected to the L1 terminal of the
DCR100. The state will be one of the following values:
• "OFF" – The relay channel is open – no current is supplied to the load.
• "ON" – The relay channel is closed – current is supplied to the load.
• "Error" – The relay channel is open due to an error condition
• "Data Not Available" – The channel is configured as "Disabled"
3: Indicator #2 – This field indicates the state of the solid-state relay between the power
source connected to P2 terminal and the load connected to the L2 terminal of the
DCR100.
4: Indicator #3 – This field indicates the state of the solid-state relay between the power
source connected to P3 terminal and the load connected to the L3 terminal of the
DCR100.
5: Indicator #4 – This field indicates the state of the solid-state relay between the power
source connected to P4 terminal and the load connected to the L4 terminal of the
DCR100.
6: Indicator #5 – This field indicates the state of the solid-state relay between the power
source connected to P5 terminal and the load connected to the L5 terminal of the
DCR100.
7: Indicator #6 – This field indicates the state of the solid-state relay between the power
source connected to P6 terminal and the load connected to the L6 terminal of the
DCR100.
PGN 65284 – DC Relay Current
The DCR100 uses this proprietary PGN to transmit the amount of current flowing through each
of the relay channels
Field 1: Manufacturer Code – This field contains Maretron's NMEA 2000® manufacturer
code, which is 137.
2: Reserved (2 bits) – This field is reserved by NMEA; therefore, this field always
contains a value of 0x3 (the DCR100 sets all reserved bits to a logic 1).
3: Industry Group – This field contains the Marine industry group code, which is 4.
Revision 1.1
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Periodic Data Transmitted PGNs
Appendix A – NMEA 2000 Interfacing
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Interfacing
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