Lantronix
SESPM1040-541-LT-xx Install Guide
33772 Rev. F
Page
31
of
64
Port Configuration
Ports 1-4
are 10/100/1000Base-T PoE++ PSE Ports.
Port 5
is a combo 10/100/1000Base-T or a 100/1000Base-X uplink port. On the -AC and -DC version, it can either
be used as a copper or fiber port. However, on the -PD version, it is normally used for PoE power input, in which
case the SFP option is not available unless you are using fiber cable running in parallel to a copper cable as the
power input, then port 5 can be used as a fiber port (or copper) instead of using it exclusively as the PoE power
input port.
Port 6
becomes available when you add either the optional Additional Combo Port Module or the optional
24V Passive PoE Module. The optional Additional Combo Port Module allows you to activate a second combo
10/100/1000Base-T maintenance port or second 1000Base-X uplink port. Port 6 can be used to aim cameras,
etc. Alternatively, port 6 can be used for the optional 24V Passive PoE Module. (Because they share the same
port, the Additional Combo Port Module providing the 10/100/1000Base-T maintenance port or second
1000Base-X uplink port and the 24V Passive PoE Module cannot be used at the same time.)
The optional SESPM-2P-1G-CP is an Additional Combo Port Module with secondary surge protection, but not
primary or cross power. If using the optional SESPM-2P-1G-CP, users must provide the primary or cross power
protection outside the switch enclosure.
Note
: If using more than one 90W port, alternate ports (i.e., no adjacent 90W ports). Use ports 1 and 3 or ports
2 and 4. Exception: using ports 2 and 3 for 90W is allowed. Since the –PD version cannot supply more than 90W,
port configuration on the -PD is not restricted. Total PD power available will always be less than 90 Watts but
the lower end of the power available will vary, determined by the equipment and cable used to power the PD.
PoE Port Power Shutdown Order
The -AC powered version of the switch is capable of supplying 180W total PoE across all ports. The -DC powered
version of the switch are capable of supplying 240W total PoE across all ports. Each port is capable of supporting
up to 90W (not to exceed 180 W or 240W total respectively).
The switch should be able to supply 90W to two ports (180W) under all normal circumstances. It is
recommended that Port 1 and Port 3 be used for the most critical devices and set to Critical PoE Port Priority to
ensure power remains up on those ports in the event the connected devices attempt to draw too much power.
If the switch exceeds the 180W (-AC) or 240W (-DC) PoE limit, then it will begin to shut power down on ports
according to PoE Port Priority settings (Low Priority ports first, then High Priority ports, then Critical Priority
ports last). If ports are set to the same priority, then the order of shutdown is
Port 4 → Port 2 → Port 3 → Port 1.
Order of Port Power Shutdown in Case of Overpowering of Connected Devices
Configured
Priority
PoE Port
Port 1
Port 2
Port 3
Port 4
Low
4
2
3
1
High
8
6
7
5
Critical
12
*
10
11
*
9
For the POE powered version (-PD), the same priority rules apply, although the maximum total power is 90W.