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| PartNumber | BB-MESR921-ST | BB-MESR922T-MT | BB-MESR921-SC |
| Description | Gateways MODBUS DIN ESS, 1 PORT, ST FIBER | Gateways MODBUS DIN ESS, 2 PORT, MU LTI ST | Gateways MODBUS DIN ESS, 1 PORT, SC FIBER |
| Manufacturer | B+B SmartWorx | B+B SmartWorx | B+B SmartWorx |
| Product Category | Gateways | Gateways | Gateways |
| Product | Modbus Gateways | Modbus Gateways | Modbus Gateways |
| Brand | B+B SmartWorx | B+B SmartWorx | B+B SmartWorx |
| Product Type | Gateways | Gateways | Gateways |
| Subcategory | Ethernet & Communication Modules | Ethernet & Communication Modules | Ethernet & Communication Modules |