Handset; Antenna - Sailor RM2042 Technical Manual

2 INSTALLATION
2.2 POWER SUPPLY
The standard power supply for the VHF DSC unit RM2042 is 12V DC.
For 24V DC supply an external power supply with the type number N420 can be used. The N420 is in
principle a 24V DC to 13.2V DC serial regulator.
For 110V AC, 127V AC, 220V AC or 237V AC operation, an external power supply with the type number
N163S must be used together with N420.

2.3 HANDSET

The handset is normaly connected directly to the VHF radiotelephone, but in a VHF DSC installation with
the RM2042, the handset must be connected to this unit instead.
The handset can be placed anywhere near the VHF DSC unit RM2042.
The cable for the handset is five-cored and must be connected to the rear of RM2042 by means of the
9 pole SUB-D connector J1-1.
For installation of the cable, please see the drawings of the mounting brackets. The cable grommet must
be placed in the most convenient groove in the mounting bracket.
If more than one handset is needed, please see section 6, SPECIAL INSTALLATION WITH 2 OR 3
MICROTELEPHONES.

2.4 ANTENNA

All commen 50 antennas, which cover the used frequency range with a reasonable standing wave ratio,
maximum 1.5, are usable.
The antenna is connected to the set by means of a 50 coaxial cable with low loss, e.g. RG213U. At the
cable end a PL259 plug is mounted.
The antenna must be placed as high and clear as possible. The horizontal distance to metal parts must
be at least one metre.
S. P. Radio has an antenna with the necessary specifications available. The mentioned antenna is
characterized by small external dimensions. For further details, see the special brochure VHF AERIALS.
12V OPERATION
2
+ RED 2.5 mm
2
- BLACK 2.5 mm
2
ON/OFF BLUE 0.5 mm
NOT USED WHEN 12V
RM2042
BATTERY SUPPLY
BLOCK DIAGRAM OF STRAPPING FOR 12V DC
P3
4
1 2
F1
5
3 4
3
2A 5 6
D2
C4
6
2
1
27769
24V OPERATION
N420
RM2042
+
24V DC
-
BLOCK DIAGRAM OF STRAPPING FOR 24V DC
ON/OFF CONTROL TO N420
P3
1 2
4
F1
5 3 4
3
2A
D2 5 6
C4
6
2
1
27770
ANTENNA
VOL ON/OFF
+13V INT.
501260
Strap for connection
to external supply (12V)
ANTENNA
VOL ON/OFF
+13V INT.
501259
Strap for connection
to N420 (24V)
RM2042
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