User guide

BLACK BOX
®
Series Convenient Switches Installation and User Guide
16
cooling. Mounting options include panel-mounting, DIN-rail, or rack-mount tray.
Choices of models for external AC or internal DC powers are available. Ambient
temperature rating is –40°C to +75°C for any of the power input types, AC or DC.
2.3 Black Box LBH101A-Series, with four (RJ-45) Copper ports
The Black Box LBH101A-Series chassis houses one main PC board. The power
supply is an external AC unit or internal DC via a screw terminal block. The front side of
the chassis has three twisted-pair switched ports and one port is provided on the rear side.
All the four ports of the LBH101A-Series convenient switch support auto-cross (MDIX),
and perform the auto-cross in the auto-negotiation mode only.
Dual LEDs indicate operating status of ports may be viewed from any direction,
and are mounted on the top as well as end for convenience. There are power (PWR)
indicators for the unit to validate that the unit is turned ON. For each port, there are Link
and Activity (LK/ACT) LEDs indicating traffic and mounted on the top of the unit,
Fig. 2.2e