JRC JMA-5104 - Power Supply and Fuse Management

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9.4 Changing Ship's Power
Use correct fuse ratings.
The use of incorrect ratings may cause an equipment failure.
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● Modify the ratings as follows according to the ship's power.
(At product delivery, a fuse of 24V is provided.)
1. Display
Three types of fuses, F1, F2, and F3, are available.
F1 : Fuse for the processing unit (10A)
F2 : Fuse for scanner unit transmitter-receiver (or less)
F3 : Fuse for scanner unit motor (or less)
A fuse for a processing unit (F1) is 10A regardless of the input voltage and scanner unit output.
A fuse for a modulator (F2) and a fuse for a scanner unit motor (F3) change according to the
input voltage as shown in the table below.
When the product is purchased, the 6.3A timelag fuse is inserted in the F2 fuse as the fuse for
12V, and the 5A timelag fuse is inserted in the F3 fuse as the fuse for 12V.
Surely exchange for the fuses suitable for the scanner unit and ship's power by using the table
below.
For NKE-2042 (4kw radome type scanner unit), fuse insertion is not necessary since F3 (fuse
for motor) is not available.
List of fuses
F2 F3
Scanner unit
model
Input power
voltage
Rating JRC code Rating JRC code
DC12V 6.3A time-lag 5ZFAD00543 − −
NKE-2042
(4kw)
DC24V/32V 3.15A time-lag 5ZFAD00359 − −
DC12V 6.3A time-lag 5ZFAD00543 5A time-lag 5ZFAD00393
NKE-2062
(6kw)
DC24V/32V 3.15A time-lag 5ZFAD00359 5A time-lag 5ZFAD00393
NKE-2102
(10kw)
DC24V/32V 5A time-lag 5ZFAD00393 8A time-lag 5ZFAD00544
2. Scanner unit
No changes are made for a scanner unit.