Cisco Cisco IOS Software Release 12.2(35)SE

This model number is eferenced in the documentation but is not available:
PWR-RGD-LOW-DC (low-voltage DC power supply)

SFP modules

3

Rugged and Industrial SFP modules

GLC-SX-MM-RGD (rugged SFP)

GLC-LX-SM-RGD (rugged SFP)

GLC-ZX-SM-RGD (rugged SFP)

GLC-FE-100LX-RGD (rugged SFP)

GLC-FE-100FX-RGD (rugged SFP)

Commercial SFPs

GLC-BX-D with digital optical monitoring (DOM) support

BLC-BX-U with DOM support

GLC-FE-100LX

GLC-FE-100BX-D

GLC-FE-100BX-U

GLC-FE-100FX

GLC-FE-100EX

GLC-FE-100ZX

CWDM SFP with DOM support

Extended Temperature SFP modules

SFP-GE-L with DOM support

SFP-GE-S with DOM support

SFP-GE-Z with DOM support

GLC-EX-SMD with DOM support

SFP module patch cable

CAB-SFP-50CM 

Power supply modules 

PWR-RGD-AC-DC
PWR-RGD-LOW-DC

For power supply module descriptions and supported 
configurations on switch models, see the hardware installation 
guide.

1.

SFP = small form-factor pluggable.

2.

PoE = Power over Ethernet.

3.

The maximum operating temperature of the switch varies depending on the type of SFP module that you use. 
See the Cisco CGS 2520 Switch Hardware Installation Guide for more information.