ICOM MR-1000RTM User Manual

■ Connecting the units

NMEA1 connection

NMEA2 connection

■ Power source requirement

D DC power source

The radar is designed for connection to any power
source if the voltage is 10.2–42 V DC, so that a 12, 24,
or 32 V DC battery can be used without a DC-DC con-
verter, or any internal modifications. 

• DC power cable connection
Connect the supplied DC power cable as shown in the
diagram.

■ Ground connection

To prevent electrical shocks and other problems, ground the display unit through the [GND] terminal on the unit’s
rear panel. For best results, connect a heavy gauge wire or strap to the nearest grounding point on the boat. The
distance between the [GND] terminal and the ground point should be as short as possible.

Incorrect cable connection may dam-

age the radar.

DC input

Ground

q N TXT
    (NMEA 2 output)

w RXD

i GND

u N.C

y AUX input (–); CLOCK
     or N+1(–) data input

t AUX input (+); CLOCK
     or N+1(+); data input

r NMEA 1 input (–)
    or AUX input (–); DATA

e NMEA 1 input (+)
     or AUX input(+); DATA 

NMEA1:
Bearing data input

NMEA2:
NMEA 0183 data input
Speed sensor input

+

;

Ground

Power supply
10.2 to 42 V DC

Red:

Black: _

PWR

GND

NEVER connect any-
thing other than the sup-
plied scanner unit.

Supplied scanner unit

9

24

q NMEA 2
     output (+)
w NMEA 2
     output (–)
e NMEA 2
     input (+)

u GND (Speed sensor)

y Speed sensor
     input

t Regulated 12 V output.
     (20 mA Max.)
r NMEA 2  input (–)

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