NT-2000 REF Manual
Installation
7-7
7.3.2.
Connector Pin Assignments and Connections
The pin assignments of the connectors and connections to the pins are illustrated below.
①
Power Supply Receptacle
Figure 7-6 Power Supply Receptacle (Front View)
・
Mating Female Type Plug: 14P–3F
The power cable supplied is approx. 3 meters long and is of two–wire shielded type,
normally terminated in a 3–hole female type plug at one end, with 3 conductors
open–ended at the other end. See
CAUTIONS 1
below.
After pushing the plug into the above receptacle and tightening its coupling ring,
connect the three conductors as follows:
・
Black conductor: to negative ( – ) terminal of ship’s power source
・
White conductor:
to positive ( + ) terminal of ship’s power source (
*
24 VDC
)
・
Shield ( braid ):
to ship’s earth ground
*
1
Nominal input voltage. The equipment operates safely over the 11–to–36V range.
< CAUTIONS >
1. The DC power cable specified for the F–2000 / F – 3 0 0 0 W o r DEBEG 4620/
DEBEG 4630 cannot be plugged into the above receptacle.
2. Reversing the power cable polarity (black and white connections) causes
the fuse to blow.
②
Cabinet Ground Terminal
Figure 7-7 Cabinet Ground Terminal
The receiver cabinet, which is electrostatically coated
inside, can be grounded to the vessel’s earth ground
without grounding the negative line of the ship’s
power source. In situations where it is required, or
desirable, to ground the cabinet for safety reasons or
*
2
EMC compliance, connect from this terminal to an
appropriate earth ground in the vessel using a thick
wire. The ground wire should be as short as possible
to reduce the chance of picking up interference from
other onboard electronics.
*
2
EMC = electromagnetic compatibility
(
continued on next page
)
Pin # 1 (
*
1
24V+)
Pin # 2 ( – )
Pin # 3 (Ground )