Certificates
Certification	FCC, CE
Features
Product colour	Grey
Hot-swap
Operational conditions
Minimum operating temperature	-40 °C
Maximum operating temperature	85 °C
Storage temperature (T-T)	-40 - 85 °C
Operating relative humidity (H-H)	5 - 85%
Storage relative humidity (H-H)	5 - 85%
Performance
SFP transceiver type	Fiber optic
Maximum data transfer rate	1250 Mbit/s
Interface type	SFP
Fiber optic connector	LC (UPC)
Fiber cable diameters supported (core/cladding)	9/125 µm
Maximum transfer distance	20000 m
Ethernet interface type	1.25 Gigabit Ethernet
Networking standards	IEEE 802.3z
Single-mode fiber (SMF) supported
Power
Input voltage	3.3 V
Weight & dimensions
Width	56.4 mm
Depth	13.4 mm
Height	11 mm

ISM321A-20 1000Base-BX WDM Bi-Directional Industrial SFP Module Supports WDM Bi-Directional technology, using a single strand of fiber, cost saving Single mode SFP LC Transceiver Hot-Pluggable with maximum flexibility Supports Digital Diagnostic Monitoring (DDM) Compatible with Small Form Pluggable Multi-Source Agreement (SFP-MSA) Industrial Product Operating Temperature Range: -40-85°C