Chapter 2 Hardware Installation Page 22
Do NOT connect PoE powered Ethernet cable to the RS-232 port; otherwise the port
may burnout!
If RS-232 cable is used outdoor, please DO add a surge protector to protect the
equipment circuit!
Strongly recommend to add a lightning arrestor on the RS-232 port to prevent from
lightning attack!
Vent
The vent is designed to exclude vapors and moisture out of the unit as well as repel water, dust, and
dirt by the specially designed membrane, thereby preventing the R2 Extender from electric
malfunctioning.
Figure 12 Vent
Warning:
Vent