Select the network interface
UF20 bus couplers connect a local UF20 I/O assembly to an industrial network. Select the PN, EC or MT model for the controller protocol. Each coupler provides two RJ45 connections and supports up to 32 expansion modules; protocol-specific features remain tied to the selected model.
| Characteristic | UF20-RTU-PN | UF20-RTU-EC | UF20-RTU-MT |
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| Protocol | PROFINET | EtherCAT | Modbus TCP/IP |
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| Network interfaces | 2 × RJ45 | 2 × RJ45, with switching function | 2 × RJ45 |
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| Transmission rate | 10/100Mbps, full duplex | 10/100Mbps, full duplex | 10/100Mbps |
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| Address setting | PROFINET specification | EtherCAT specification | Modbus TCP/IP specification; address range 2-253 |
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| Coupler supply current | <200mA | <200mA | <150mA |
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| Load supply voltage | 24V DC, +20%/-15% | 24V DC, +20%/-15% | 24-32V DC |
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Protocol-specific functions
| Model | Function | Details |
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| UF20-RTU-PN | Real-time and network functions | RT; Class C; MRP; automatic addressing and topology detection |
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| UF20-RTU-PN | Alarms | Diagnostic, process and connector insertion/removal alarms |
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| UF20-RTU-PN | Minimum cycle time | 1ms |
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| UF20-RTU-MT | Modbus function codes | 01, 02, 03, 04, 05, 06, 15, 16, 23 |
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Shared communication and power data
| Characteristic | All three models |
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| Expansion capacity | 32 modules |
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| Process data capacity | 1024 bytes |
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| Transmission distance | 100m |
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| Address mapping | Supported |
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| Transmission medium | Category 5 twisted-pair cable |
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| Isolation | Electrical isolation |
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| Coupler operating voltage | 24V DC, +20%/-15% |
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| System supply output | 5V DC; 2A maximum |
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| Load supply current | 10A maximum |
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Coupler consumption, the 5V system supply and the load supply are separate electrical ratings. In particular, the MT model has a different load-voltage range from the PN and EC versions.
Wiring and installation
| Characteristic | All three models |
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| Supply connection | Push-in terminal blocks |
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| Conductor cross-section | 0.34-1.5mm² |
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| Conductor size | AWG22-AWG16 |
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| Stripping length | 8-10mm |
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| Height × width × depth | 75mm × 24mm × 105mm |
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| Mounting | 35mm DIN rail |
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| Ingress protection | IP20 |
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| Operating temperature | -10°C to +55°C |
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| Storage temperature | -20°C to +85°C |
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| Relative humidity | 5-95%RH, non-condensing |
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