• Product type: SFP plug-in transceiver (SCALANCE X accessory)
• Manufacturer: Siemens
• Product family: SCALANCE X plug-in transceivers
• Model: SFP991-1LD
• Data rate: 100 Mbit/s (100BASE-LX)
• Optical interface: LC duplex
• Fiber type: Single-mode fiber
• Wavelength: 1310 nm
• Maximum transmission distance: Up to 26 km
• Ports:

1 × optical LC port

• Connector type: SFP module (plug-in)
• Transmission method: Optical Ethernet (100BASE-LX)
• Operating protection: IP20
• Standards/approvals: EN, UL
• Mounting type: Inserted into SFP slot
• Dimensions (W × H × D):

14 × 9 × 57 mm

• Weight:

Approx. 0.01–0.03 kg

• Application:
• Industrial Ethernet networks
• Fiber communication for SCALANCE switches
• Long-distance single-mode fiber links