ADLINK MXE-1300 Series - Manual (Page 46)

34 Getting Started
2.4 Connecting DC power
The MXE-1300 DC power input connector utilizes V+, V- , and
chassis ground pins, and accepts input voltage as discussed.
Connect the DC power connector and fix using the 2 screws.
WARNING:
Before providing DC power to the MXE-1300, ensure voltage
and polarity provided are compatible with the DC input.
Improper input voltage and/or polarity can be responsible for
system damage.