Frequently Asked Questions about UR-9HH
What are the unique features of a UR-9HH functioning as a CPU for a Multilin universal relay in the UR series?
The UR-9HH CPU module is a member of the ‘9H’ CPU type, which are currently obsolete and only available as a surplus option. The UR-9HH has an ideal communication aspect that led the major hardware revision of the ‘9J’ and ‘9K’ CPU modules in 2015. This aspect is the additional copper 10/100Base-TX Ethernet port found on the lower right aspect of the unit (rear view). Users have used this port for service purposes by connecting to it in the case of configuration, maintenance, or commissioning situations. Thus, the same copper 10/100Base-TX Ethernet port is now found on the ‘9J’ and ‘9K’ CPU modules used for the Multilin UR series universal relays.
Where are the Ethernet ports found on the Multilin UR-9HH CPU module?
When viewing the Multilin UR-9HH module from the facing (portion labeled with CPU and model designation), the CPU appears as an enclosed casing with a black matte finish. From the rear view however, the three tiers of boards can be viewed through the windowed back aspect of the CPU. The two Ethernet ports are found centrally in the front of the unit and at the bottom right aspect of the rear view. The Ethernet port located at the rear of the unit is the copper 10/100Base-TX Ethernet port.