Installation guide

23
Release Notes for the Cisco ME 3400 Ethernet Access Switch, Cisco IOS Release 12.2(44)SE
OL-14632-01
Documentation Updates
Updates to the Hardware Installation Guide
These are updates to the Cisco ME 3400 Hardware Installation Guide:
• “Installation Information” section on page 23
• “Update to Appendix C” section on page 23
Installation Information
Cisco Ethernet Switches are equipped with cooling mechanisms, such as fans and blowers. However,
these fans and blowers can draw dust and other particles, causing contaminant buildup inside the chassis,
which can result in a system malfunction.
You must install this equipment in an environment as free as possible from dust and foreign conductive
material (such as metal flakes from construction activities).
These standard provide guidelines for acceptable working environments and acceptable levels of
suspended particulate matter:
• Network Equipment Building Systems (NEBS) GR-63-CORE
• National Electrical Manufacturers Association (NEMA) Type 1
• International Electrotechnical Commission (IEC) IP-20
Update to Appendix C
This information is being added to the “Wiring the DC-Input Power Source” section of Appendix C,
“Connecting to DC Power,” in the Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide:
Before you wire the DC-input power source, review the warnings in this section and this information:
If the switch software detects that the circuit boards are not receiving power from an internal power
supply, the software sends a message like this to the console:
00:06:54: %POWER_SUPPLIES-3-PWR_FAIL: Power supply 2 is not functioning
00:06:54: %PLATFORM_ENV-1-DUAL_PWR: Faulty internal power supply 2 detected
This message means that an internal power supply is not providing power. To receive this alert if power
fails on the ME 3400G-12CS-DC switch with two power feeds, we recommend that you connect one feed
to the left DC power terminal block and the other to the right DC power terminal block. (See the example
in Figure 1.)
The grounding architecture of this product is DC-isolated (DC-I).
DC-powered products have a nominal operating DC voltage of 48 VDC. Minimal steady state DC
operating voltage is 40 VDC. Reference American National Standards Institute (ANSI) T1.315,
Table 1.
Table 4 NEBS Compliance Statements (continued)