| Article number | 6ES7241-1CH32-0XB0 | 6ES7241-1AH32-0XB0 |
| Communication Module cm 1241, RS422/485 | Communication Module cm 1241, RS232 |
| General information |
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| Product type designation | CM 1241 RS 422 / 485 | CM 1241 RS 232 |
| Supply voltage |
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| 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 |
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| Current consumption, max. | 220 mA; From backplane bus 5 V DC | 200 mA; From backplane bus 5 V DC |
| Power loss |
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| Power loss, typ. | 1.1 W | 1.1 W |
| Interfaces |
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| Interfaces/bus type | RS 422 / 485 (X.27) | RS 232C (V.24) |
| Number of interfaces | 1 | 1 |
| Point-to-point connection |
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● Cable length, max. · | 1 000 m | 10 m |
| Integrated protocol driver |
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| ·
— 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 |
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| Protocols |
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| Integrated protocols |
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| Freeport |
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| ·
— Telegram length, max. · | 1 kbyte | 1 kbyte |
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— Bits per character · | 7 or 8 | 7 or 8 |
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— Number of stop bits · | 1 (Standard), 2 | 1 (Standard), 2 |
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— 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) |
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— Telegram length, max. · | 1 kbyte | 1 kbyte |
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— Bits per character · | 7 or 8 | 7 or 8 |
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— 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 |
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— 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 |
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| ·
— Address area · | 1 through 49 999 (Standard Modbus addressing) | 1 through 49 999 (Standard Modbus addressing) |
| Dimensions |
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| Width | 30 mm | 30 mm |
| Height | 100 mm | 100 mm |
| Depth | 75 mm | 75 mm |
| Weights |
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| Weight, approx. | 155 g | 150 g |
