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The KL6021 and KL6041 serial interfaces allow devices with an RS422 or RS485 interface to be connected. The device connected to the terminal communicates with the automation device via the Bus Coupler. The active communication channel operates independently of the higher-level bus system in full or half duplex mode at up to 19,200 baud or 115.2 kbaud (KL6041). The transmission of differential signals conforms to RS422 and guarantees high immunity to interference through electrically isolated signals.
| Technical data | KL6021 | KS6021 | KL6041 | KS6041 |
|---|---|---|
| Technology | RS422/RS485 | |
| Data transfer channels | TxD and RxD, full/half duplex | |
| Data transfer rates | 1,200…19,200 baud; default: 9,600 baud, 8 data bits, no parity and one stop bit | 4,800…115,200 baud; default: 9,600 baud, 8 data bits, no parity and one stop bit |
| Bit transfer | with differential signal | |
| Line impedance | 120 Ω | |
| Cable length | approx. 1,000 m twisted pair | |
| Power supply | via the K-bus | |
| Current consumpt. K-bus | typ. 65 mA | |
| Current consumption power contacts | – (no power contacts) | |
| Electrical isolation | 500 V (K-bus/signal voltage) | |
| Data buffer | 128 bytes receive buffer, 16 bytes transmit buffer | 1024 bytes receive buffer, 128 bytes transmit buffer |
| Bit width in the process image | input/output: 3 x 8 bit user data, 1 x 8 bit control/status (up to 5 x 8 bit user data are possible) | input/output: 22 x 8 bit user data, 2 x 8 bit control/status (up to 22 byte user data are possible) |
| Configuration | no address setting, configuration via Bus Coupler or controller | |
| Special features | high interference immunity, electrically isolated signals | |
| Weight | approx. 60 g | |
| Operating/storage temperature | 0…+55 °C/-25…+85 °C | -25…+60 °C/-40…+85 °C |
| Relative humidity | 95 %, no condensation | |
| Vibration/shock resistance | conforms to EN 60068-2-6/EN 60068-2-27/29 | |
| EMC immunity/emission | conforms to EN 61000-6-2/EN 61000-6-4 | |
| Protect. class/installation pos. | IP 20/variable | |
| Pluggable wiring | for all KSxxxx Bus Terminals | |
| Approvals | CE, UL, Ex | |
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| Special terminals | |
|---|---|
| KL6021-0020 | standard format 5 bytes of user data (rest default) |
| KL6021-0021 | standard format 5 bytes of user data (7 bits, even, 1 stop bit, 9,600 baud) |
| KL6021-0023 | serial Bus Terminal for processing the RS485 signals from the KL6023 wireless adapter with EnOcean radio technology |
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| Accessories | |
|---|---|
| TwinCAT PLC Serial Communication | IEC 61131-3 software library for TwinCAT PLC for communication via serial devices |
| TwinCAT PLC Serial Communication 3964R/RK512 | licence for using the software library for communication via serial Bus Terminals or PC COM ports using the protocol 3964R/RK512 |
| TwinCAT PLC Modbus RTU | IEC 61131-3 software library for TwinCAT PLC with Modbus RTU function blocks for serial communication with Modbus devices |
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| System | |
|---|---|
| RS485 | For further RS485 products please see the system overview. |
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