Network Power Supply - Furuno M12-05BM+05BF-010 Design Manual

1.7 Network Power Supply

The Furuno CAN bus network devices operate at 9.0 to 16.0 Vdc. Ensure that the voltage of
power supply to the device located farthest from the power source on the network is 9.0 Vdc
or more.
The total current carrying capacity of the network depends on the choice of backbone cable
and where the power is connected into that cable. The heavy cable is rated at 8 Amps and the
light cable is rated at 1 Amp. Both of these ratings are at 20 degrees Celsius and must be
de-rated with temperature. If the power connection is made to the center of the backbone
cable, then the current carrying capacity is effectively doubled as the full capacity is available
to each end of the network from the power connection point.
For CAN bus network with DRS
The DRS series outputs 15 Vdc, 1A from the network port to the CAN bus devices in the
network. The power supply cable connection to the network is not necessary when the DRS is
in the network. The power connection is at either the end or middle of the network.
Note that the pin assignment of the network port differs between radome and open antennas.
J603 in Radome Antenna
Pin No. Signal name Remarks
1 SHIELD
2 NC
3 NET_S
4 NET_C
5 NET_H
6 NET_L
The number of the devices that can be connected to the network powered from the DRS
depends mainly on the network load. For example, Weather Station, WS-200 and Satellite
Compass, SC-30 are not connected to the DRS via CAN bus at the same time due to
overload. The following section describes the network load calculation.
When both the SC-30 and WS-200 are connected to the network with the DRS, disconnect
pins 3 and 4 of J603 on the CAN bus interface board, 03P9462 in the DRS and connect an
external 15-Vdc power supply to the network backbone cable.
V+ (+15V)
V-
CAN_H
CAN_L
GP-330B
Combination:
15 Vdc, 1A
Fig.29 Furuno CAN bus powered from DRS
(No network power cable required)
Furuno CAN bus Network Design Guide
TB102 in Open Antenna
Pin No. Signal name Remarks
1 SHIELD
2 NET_S
3 NET_C
4 NET_H
5 NET_L
WS-200
YES YES
YES NO
10
V+ (+15V)
V-
CAN_H
CAN_L
SC-30
NO
YES