Specifications

14 | Installation
Power Requirement
External power supplied to the MX521A must be within
10.5-32 VDC for best operation. To protect the circuitry
in the MX521A, the voltage level must be within these
limits. Negative grounding is required. The MX521A
draws less than 300 mA. at 12 VDC. An in-line fuse or
circuit breaker rated at 2 amp. is recommended for
overload protection.
When the MX521A is connected to an MX control and
display unit (CDU), the 12 VDC antenna power is supplied
by the CDU unit.
The red wire connects to the (+) DC power, while the
black wire is the negative return. Although the MX521A
has a reverse polarity protection, it is prudent to make
sure that proper polarity is observed before making the
connection.
Reverse polarity connection may damage the unit.
Antenna Cable Assembly
Below is a diagram showing the pins and wire color-
coding of the antenna cable assembly.
Power/Data Cable Assembly
10-Pin Female Connector
Antenna cable Assy.
Pin#
10
9
8
7
6
5
4
3
2
1
* Not available with MX521G models
Wire
Prpl/Gry
Purple
White
Yellow
Green
Orange
Brown
Blue
Red
Black
Signal
Ext. RTCM IN -
Ext. RTCM IN+
Beacon status Out +*
Beacon Status Out -*
GPS Out +
GPS Out -
MPM In+
MPM In -
+12-32VDC
Negative GND