Enterasys Networks BL-89420ENT User Manual

Mid-Span Power Hub 20-Port and 10-Port User’s Guide

3-1

Refer to 

 for a checklist of problems and recommended actions to resolve the 

problem. If additional support is needed, refer to “

Unit is plugged into the Enterasys 
Mid-Span Power Hub, but main power 
indicator is “off.”

Verify the use of a good AC cable with a good 
ground connection. 

Verify that the AC is “hot” and that voltage is from 
100 VAC to 264 (50 Hz to 60 Hz). 

For the 20-port or 10-port Mid-Span Power Hub, if 
the internal fan is working, there may be an internal 
circuitry fault or an internal voltage is out of 
specification. If the fan is not working, there may be 
an internal power supply fault.

Unit is plugged in and running, but the 
20-port or 10-port Mid-Span Power Hub 
fans are not working.

Verify that all fan openings are clear. 

Verify that the metal case is not damaged. 

Verify that there are no loose parts inside the Mid-
Span Power Hub.

Product Considerations: 
BL-89500ENT, BL-89400ENT, BL-89700ENT Series
If needed, check and replace fuse F1, with a 
2.0 A rated fuse

BL-89600ENT Series
If needed, check and replace fuse F3, with a
2.0 A rated fuse

Unit is plugged into the 20-port or 10-port 
Mid-Span Power Hub and running, but fails 
when a PoE client is installed. 

No power is supplied to PoE client.

Verify that the unit (BL-89500ENT, BL-89400ENT, 
BL-89700ENT or BL-89600ENT) is electrically 
insulated from ground (ground-isolated).

Using an insulated bracket and nylon washers/ 
screws may be necessary.