Modbus RTU master communication
The UE20-1MCOM-485/232 provides one serial communication channel with RS485 or RS232 interfaces. It operates as a Modbus RTU master station and supports synchronization messages and communication timeout detection.
Serial interface and baud rates
| Characteristic | UE20-1MCOM-485/232 |
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| Communication channels | 1 |
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| Physical interface | RS485 or RS232 |
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| Protocol role | Modbus RTU master |
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| Maximum RS485 network nodes | 32 |
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| Selectable baud rates | 1200, 2400, 4800, 9600, 14400, 19200, 38400, 56000, 57600 and 115200baud |
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| Synchronization messages | Supported |
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| Communication timeout detection | Supported |
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Choose the interface and baud rate to match the connected equipment. The 32-node network limit applies to RS485 operation; use RS232 for a point-to-point connection.
Supply and installation
| Characteristic | Specification |
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| Operating voltage | 5V DC, ±10% |
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| System supply current | 76mA |
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| Connection method | Spring terminal blocks |
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| Height × width × depth | 100mm × 12mm × 68mm |
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| Mounting | 35mm DIN rail |
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| Ingress protection | IP20 |
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Environmental conditions
| Characteristic | Specification |
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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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