3
Product Overview
Cable Side
When both power-supply modules are installed, the system has enough power to support all twelve ports as PoE ports.
The maximum available PoE power is 200W.
With one power module installed, the maximum available PoE power is 80W. In case one power-supply modules fails,
the power to the low priority PoE ports is dropped, while power to the high priority PoE ports remains uninterrupted.
On a per-port basis, you control whether or not a port automatically provides power when an IP phone or an access point
is connected.
The 10/100/1000 PoE ports use RJ-45 connectors with Ethernet pinouts. The maximum cable length is 328 feet (100
meters). The 100BASE-TX and 1000BASE-T traffic requires CA5, CAT5e, or CAT6 unshielded twisted pair (UTP) cable.
The 10BASE-T traffic can use CAT3 or CAT4 UTP cable.
For information about configuring and monitoring PoE ports, see the switch software configuration guide on Cisco.com.
For information about port connections and port specifications, see
Connecting Devices to the Ethernet Ports, page 30
.
Note:
The output of the PoE circuit has been evaluated as a Limited Power Source (LPS) per IEC 60950-1.
Alarm Ports
The switch has four alarm inputs and one alarm output.
Alarm Input
The alarm input is a dry-contact alarm port. You can connect up to four alarm inputs from devices, such as a door, a
temperature gauge, or a fire alarm, to the alarm port. You can use the CLI to set the alarm severity to minor, or major. An
alarm generates a system message and turns on an LED. See the
Alarm LEDs, page 9
for the LED descriptions.
Alarm Output
The alarm output can be configured as a major alarm. Output alarms often control an external alarm, such as a bell or a
light. To connect an external alarm device to the relay, you connect two relay contact wires to complete the electrical
circuit. See for information on the alarm pinouts. see the
Alarm Port, page 54
.
Mini USB Port
Note:
The 5-pin mini-Type B connectors resemble the 4-pin mini-Type B connectors. They are not compatible. Use only
the 5-pin mini-Type B.
Figure 2
USB Mini-Type B Port
The configurable inactivity timeout reactivates the RJ-45 console port if the USB console port is activated, but no input
activity occurs on it for a specified time period. When the USB console port deactivates due to a timeout, you can restore
its operation by disconnecting and reconnecting the USB cable. For information on using the CLI to configure the USB
console interface, see the switch software guide.
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