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| SIMATIC S7-1200, Communication Board CB 1241, RS-485, junction box, support free port | ||
| general information | ||
| product Type mark | CB 1241 RS485 | |
| input current | ||
| DC 5V from backplane bus, typical value | 50 mA | |
| power loss | ||
| power loss, typical | 1.5W | |
| interface | ||
| point-to-point | ||
| ● wire length, maximum | 1 000 m | |
| integrated Protocol driver | ||
| -Free port | yes | |
| -ASCII | yes; Available as a library function | |
| -Modbus | yes | |
| -Modbus RTU master station | yes | |
| -Modbus RTU slave station | yes | |
| -USS | yes; Available as a library function | |
| agreement | ||
| integration protocol | ||
| free Port | ||
| -Message length, maximum | 1 kbyte | |
| -The number of digits per character | 7 or 8 | |
| -Number of stop bits | 1 (standard),2 | |
| -Parity check | (Default standard) no parity; Positive, odd, and marked (parity bit is always 1); Blank (parity bit is always 0) | |
| 3964 (R) | ||
| -Message length, maximum | 1 kbyte | |
| -The number of digits per character | 7 or 8 | |
| -Number of stop bits | 1 (standard),2 | |
| -Parity check | (Default standard) no parity; Positive, odd, and marked (parity bit is always 1); Blank (parity bit is always 0) | |
| Modbus RTU master station | ||
| -Address Range | 1 to 49 999 (standard Modbus addressing) | |
| -Number of slave stations, maximum | 247; From station number 1 to 247, each MODBUS network segment can contain up to 32 devices. More than repeater is required to extend the network to the maximum configuration. | |
| Modbus RTU slave station | ||
| -Address Range | 1 to 49 999 (standard Modbus addressing) | |
| alarm/diagnosis/status information | ||
| diagnostic function | yes | |
| protection level and protection category | ||
| protection level in accordance with EN 60529 | ||
| ● IP20 | yes | |
| standards, licenses, certificates | ||
| CE Mark | yes | |
| cULus | yes | |
| FM license | yes | |
| RCM(C-TICK format) | yes | |
| KC license | yes | |
| environmental requirements | ||
| open Air | ||
| ● maximum drop | 0.3 m; Five, in the shipping package | |
| operating ambient temperature | ||
| ● minimum | -20°C | |
| ● maximum value | 60°C | |
| ● horizontal installation, minimum | -20°C | |
| ● horizontal installation, maximum | 60°C | |
| ● vertical installation, minimum | -20°C | |
| ● vertical installation, maximum | 50°C | |
| ● allow temperature change | 5°C to 55°C,3°C/minute | |
| ambient temperature during transportation/storage | ||
| ● minimum | -40°C | |
| ● maximum value | 70°C | |
| air pressure meets IEC 60068-2-13 standard requirements | ||
| ● operation, minimum | 795 hPa | |
| ● operation, maximum | 1 080 hPa | |
| ● storage/transportation, minimum | 660 hPa | |
| ● storage/transportation, maximum | 1 080 hPa | |
| relative air humidity | ||
| ● non-condensing operation at 25°C, maximum | 95% | |
| machinery/materials | ||
| shell material (front) | ||
| ● Plastic | yes | |
| size | ||
| width | 38 mm | |
| height | 62 mm | |
| depth | 21 mm | |
| weight | ||
| weight, about | 40g | |
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