The first Furuno DRS (Digital Radar Sensor) series of antennas have been around since the introduction of NavNet 3D in 2008. All these original DRS antennas (DRS2D, DRS4D, DRS4A, DRS6A, DRS12A and DRS25A) are compatible with NavNet TZtouch, TZtouch2 and TZtouch3 series systems. Here are some simple yet important troubleshooting tips to ensure their successful installation and operation.
The original DRS series Radars require 48 VDC and need a suitable power supply, such as the PSU017 (DRS2D/4D), PSU012 (DRS4A/6A/12A) or PSU013 (DRS25A only). These power supply units accept 12 or 24 VDC and convert it to 48 VDC for the Radar. Both the PSU012 and PSU013 have an internal jumper (J7) that
must be in place
for the unit to power "On" the Radar without NavNet 3D Power Sync. This jumper must be in place when using the TZtouch, TZtouch2, or TZtouch3 MFDs.
Original-series DRS scanners must be updated to software version 1.16 or later to be compatible with any TZtouch system.
In subsequent years we introduced additional and successor models, such as
the DRS4DL, 4DL+, NXT and new X-Class DRS Radar sensors. These newer DRS units are "direct to power" (accepting either 12 or 24 VDC depending on model) using a new power/data scanner cable.
For Radars that require 24 VDC input power,
a 12 to 24 VDC power converter may be needed, if 24 VDC is not available on the boat.
The new cable design includes a CAT-6 Ethernet cable (like older DRS cables).
A major difference in this design is the use of a molded connector on the cable, which mates to a 0.5M pigtail cable and connector on the DRS antenna itself.
The Ethernet cable can be eliminated in installation, or for troubleshooting, by running a CAT-6 Ethernet cable as a bypass
directly from the T/R (accessed by opening the gearbox cover and disconnecting the Pigtail's Ethernet connection) directly to the MFD unit.
To aid in troubleshooting, a diagram of this new cable (with fuse recommendations) is shown below, noting that new ATC blade type fuses are used: