ME34X-PWR-AC Cisco ME 3400E 80W AC Power Supply Module

ME34X-PWR-AC is the AC power supply and fan module for the Cisco ME 3400E-24TS-M and ME 3400EG-12CS-M Ethernet access switches. The module is a field-replaceable unit, and a switch ships with at least one power-supply module installed, either AC or DC depending on the configuration. The DC counterpart is the ME34X-PWR-DC.

The 80-W AC module is an autoranging unit that accepts input voltages between 85 and 264 VAC and ships with a power cord for the AC outlet. The generic AC cord is CAB-AC. Each supply is cooled by internal fans, and for the best efficiency in a warm environment at least two of the four fans should be working; a fan failure raises an alarm, and the module should then be replaced right away.

The switch has two power-supply slots, PSU 1 and PSU 2, and each AC input is dedicated to one module, so a single AC feed does not power both. When two supplies run in one switch, the power-supply dual global configuration command makes the switch send a message when one supply is missing. The PSU OK LED is green when the input, the 12-V output and both fans are working, red for a fault in the 12-V output, a fan failure or an input out of range, and off with no input power.

Either a supply module or a blank cover (ME34X-PWR-BLANK=) must fill each slot at all times to preserve airflow and prevent overheating. Mounting uses two captive screws torqued to 10 in-lb, and a power-cord retainer comes in the switch accessory kit.