Cisco Catalyst WS-C3560X-24T-L is 24 Gigabit Ethernet ports standalone switch with no stacking option in LAN base feature set. Four optional network modules and license-base software feature provide flexibility, scalability and feature extensibility in order to reduce the cost of development of business needs. LAN base feature set offers up to 255-Vlans and comprehensive layer 2 feature with static routing and SVI interface supporting. WS-C3560X-24T-L is designed for enterprise access layer switching; however, customers can transparently upgrade the software feature to by purchasing either IP base license or IP services license to activity layer 3 capability, 1005 VLans supporting. WS-C3560X-24T-L comes with one default power supply module, customers can purchase additional power supply insert into power supply bay 2 in order to power redundancy.

WS-C3560X-24T-L

Cisco Catalyst 3560-X Series Switch

24 * 10/100/1000 Gigabit Ethernet ports with optional uplink network modules

Dual redundant, modular power supplies and fans

LAN base feature set with upgrade option to IP base or IP service

Layer 2 switching with static routing and SVI supporting

64MB flash and 256 memory (DRAM)

USB Type-A and Type-B ports for storage and console respectively and an out-of-band Ethernet management port

                                                                                                     Figure 1

Cisco Catalyst 3560-X Series Switches support 4 optional network modules for uplink ports (Figure 1);
The default switch configuration doesn't include the uplink module; 
When purchasing switch, customers have flexibility to choose any group of network modules described below:

                                                                                              Figure 2

Dual Redundant Modular Power Supplies

Cisco Catalyst 3750-X Series and 3560-X Series Switches support dual redundant power supplies (Figure 2);
One power supply is shipped with the switch by default;
Other power supply/suppliers can be purchased when ordering the switch or next time according to your needs.
If only one power supply is installed, it should always be in the power supply bay 1.

Table below shows the different power supplies available in these switches and available PoE power.

Power Supply Models