The R4 computer system is a fan-less, solid-state computer that relies on thermal conduction to move heat
from internal components to the outside of the enclosure. Airflow around the computer assists with this
heat removal process. It is optimal to mount the computer in an area that has either natural or forced
airflow to constantly remove heat from the enclosure.
POWER SUPPLY
The power supply provided has a universal AC input. It provides 24 VDC @ 2.7 A max output to the R4
system. Typical power consumption varies depending on COM Express Module, memory capacity,
OS/software activity and peripheral devices. AC current draw will never exceed 1.4 A.
The included AC/DC power supply has an operational temperature range of 0 °C to 40 °C. If the
computer must be located in an environment greater than 40 °C, a different power source should
be used. Ensure the power source can supply the power listed below.
All necessary system voltages are generated from a single DC input capable of accepting 18 VDC to 36 VDC
(fed by above DC power supply).
Acceptable System Input Voltage
18 VDC-36 VDC
DC Current Rating (Dependent on COM
Express Module, input voltage, application
software load and installed I/O cards)
375 mA-4400 mA
©Sealevel Systems, Inc.
R4 Manual
11
SL9260 06/2015
