ADLINK STC-15W04 - Manual (Page 23)

Getting Started 13
STC-15W04
3.2 Connecting Power
Insert the positive and negative leads from the power supply as
marked on the chassis into the pluggable terminal block included
with the device.
Insert the pluggable terminal block into the 3-pole connector on
the I/O panel of the device. The device will power up when the
power supply is turned on.
WARNING:
Make sure the power supply is turned OFF when handling the
power leads.