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| Article number | 6ES7241-1CH32-0XB0 | 6ES7241-1AH32-0XB0 |
| Communication Module cm 1241, RS422/485 | Communication Module cm 1241, RS232 | |
| General information | ||
| Product type designation | CM 1241 RS 422 / 485 | CM 1241 RS 232 |
| Supply voltage | ||
| Rated value (DC) | 24 V | 24 V |
| permissible range, lower limit (DC) | 20.4 V | 20.4 V |
| permissible range, upper limit (DC) | 28.8 V | 28.8 V |
| Input current | ||
| Current consumption, max. | 220 mA; From backplane bus 5 V DC | 200 mA; From backplane bus 5 V DC |
| Power loss | ||
| Power loss, typ. | 1.1 W | 1.1 W |
| Interfaces | ||
| Interfaces/bus type | RS 422 / 485 (X.27) | RS 232C (V.24) |
| Number of interfaces | 1 | 1 |
| Point-to-point connection | ||
| ·
● Cable length, max. · |
1 000 m | 10 m |
| Integrated protocol driver | ||
| ·
— Freeport · |
Yes | Yes |
| ·
— ASCII · |
Yes; Available as library function | Yes; Available as library function |
| ·
— Modbus RTU master · |
Yes | Yes |
| ·
— MODBUS RTU slave · |
Yes | Yes |
| ·
— USS · |
Yes; Available as library function | |
| Protocols | ||
| Integrated protocols | ||
| Freeport | ||
| ·
— Telegram length, max. · |
1 kbyte | 1 kbyte |
| ·
— Bits per character · |
7 or 8 | 7 or 8 |
| ·
— Number of stop bits · |
1 (Standard), 2 | 1 (Standard), 2 |
| ·
— Parity · |
No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) | No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) |
| 3964 (R) | ||
| ·
— Telegram length, max. · |
1 kbyte | 1 kbyte |
| ·
— Bits per character · |
7 or 8 | 7 or 8 |
| ·
— Number of stop bits · |
1 (Standard), 2 | 1 (Standard), 2 |
| ·
— Parity · |
No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) | No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) |
| Modbus RTU master | ||
| ·
— Address area · |
1 through 49 999 (Standard Modbus addressing) | 1 through 49 999 (Standard Modbus addressing) |
| ·
— Number of slaves, max. · |
247; slave numbers 1 through 247, per MODBUS network segment maximum 32 devices, additional repeaters needed to expand the network to maximum configuration | 247; slave numbers 1 through 247, per MODBUS network segment maximum 32 devices, additional repeaters needed to expand the network to maximum configuration |
| MODBUS RTU slave | ||
| ·
— Address area · |
1 through 49 999 (Standard Modbus addressing) | 1 through 49 999 (Standard Modbus addressing) |
| Dimensions | ||
| Width | 30 mm | 30 mm |
| Height | 100 mm | 100 mm |
| Depth | 75 mm | 75 mm |
| Weights | ||
| Weight, approx. | 155 g | 150 g |
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