Furuno TZT9 Installation Manual page 14

2. WIRING
2.1.3 CAN bus port
Every TZT9/14 has one CAN bus port
(micro style connector). All TZT9/14
MUST be connected to the same CAN
bus backbone. However, the TZT9/14
and DRS (radar sensor) CAN bus ports
cannot be connected together. The TZT9/14 and DRS (radar sensor) use "Ethernet
Bridging" to link the DRS CAN bus and the TZT9/14 CAN bus data. Refer to
paragraph 2.2.1 for more information. Note that the TZT9/14 CAN bus port is not pow-
ered unless external power is applied to the FRUDD-18AFFM-L180 cable of MULTI
port and must be connected to a properly configured CAN bus network.
What is CAN bus?
CAN bus is a communication protocol that shares multiple data and signals through a
single backbone cable. You can simply connect any CAN bus devices onto the back-
bone cable to expand your network onboard. With CAN bus, IDs are assigned to all
the devices in the network, and the status of each sensor in the network can be de-
tected. All the CAN bus devices can be incorporated into the NMEA2000 network. For
detailed information about CAN bus wiring, see "FURUNO CAN bus Network Design
Guide" (Type: TIE-00170) on Tech-Net.
DRS radar sensor
In addition to the CAN bus port found on
the TZT9/14, all DRS radar sensors have
one powered CAN bus port (terminal strip
connector). You may directly connect vari-
ous FURUNO CAN bus sensors to the
DRS radar sensor without having to run a
separate CAN bus cable to the mast. The
total number of sensors that can be con-
nected to the CAN bus DRS port without
external power connection depends on
power consumption. The DRS can supply up to 1 amp (20LEN) to the DRS CAN bus
network. Note that the CAN bus network connected to the DRS is its own independent
CAN bus backbone and needs to be terminated at both ends by a terminating resistor.
A 120 Ohm resistor is standard supply with the DRS to terminate the CAN bus. For
example, if you install a SC-30/GP-330B with the DRS CAN bus port, you must have
two terminators on the backbone. One can be at the sensor and the other located in-
side the DRS as shown in the inset at right.
Refer to the DRS Installation Manual for more information about connection.
2-4
Resistor assembly
(120 OHM-1007#24-L50,
supplied with DRS)
Twisting and
soldering
GPS RECEIVER
GP-330B
In the above example, the terminating resistors are
necessary at DRS and SC-30.
TZT9 TZT9
Blue
CAN bus cable
SC-30
TZT14 TZT14
White