| General information | ||
| Product type designation | CB 1241 RS 485 | |
| Input current | ||
| from backplane bus 5 V DC, typ. | 50 mA | |
| Power loss | ||
| Power loss, typ. | 1.5 W | |
| Interfaces | ||
| Point-to-point connection | ||
| ● Cable length, max. | 1 000 m | |
| Integrated protocol driver | ||
| — Freeport | Yes | |
| — ASCII | Yes; Available as library function | |
| — Modbus RTU master | Yes | |
| — Modbus RTU device | Yes | |
| — USS | Yes; Available as library function | |
| Protocols | ||
| Integrated protocols | ||
| Freeport | ||
| — Telegram length, max. | 1 kbyte | |
| — Bits per character | 7 or 8 | |
| — Number of stop bits | 1 (Standard), 2 | |
| — Parity | No parity (standard); even, uneven, mark (parity bit always 1); space (parity bit always 0) | |
| 3964 (R) | ||
| — Telegram length, max. | 1 kbyte | |
| — Bits per character | 7 or 8 | |
| — Number of stop bits | 1 (Standard), 2 | |
| — Parity | 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) | |
| — max. number of devices | 247; slave numbers 1 through 247, per MODBUS network segment maximum 32 devices, additional repeaters needed to expand the network to maximum configuration | |
| protocols / Modbus RTU device / header | ||
| — Address area | 1 through 49 999 (Standard Modbus addressing) | |
| Interrupts/diagnostics/status information | ||
| Diagnostics function | Yes | |
| Degree and class of protection | ||
| IP degree of protection | IP20 | |
| Standards, approvals, certificates | ||
| CE mark | Yes | |
| CSA approval | Yes | |
| UL approval | Yes | |
| cULus | Yes | |
| FM approval | Yes | |
| RCM (formerly C-TICK) | Yes | |
| KC approval | Yes | |
| Marine approval | Yes | |
| Ambient conditions | ||
| Free fall | ||
| ● Fall height, max. | 0.3 m; five times, in product package | |
| Ambient temperature during operation | ||
| ● min. | -20 °C | |
| ● max. | 60 °C | |
| ● horizontal installation, min. | -20 °C | |
| ● horizontal installation, max. | 60 °C | |
| ● vertical installation, min. | -20 °C | |
| ● vertical installation, max. | 50 °C | |
| ● permissible temperature change | 5°C to 55°C, 3°C / minute | |
| Ambient temperature during storage/transportation | ||
| ● min. | -40 °C | |
| ● max. | 70 °C | |
| Air pressure acc. to IEC 60068-2-13 | ||
| ● Operation, min. | 795 hPa | |
| ● Operation, max. | 1 080 hPa | |
| ● Storage/transport, min. | 660 hPa | |
| ● Storage/transport, max. | 1 080 hPa | |
| Relative humidity | ||
| ● Operation at 25 ℃ without condensation, max. | 95 % | |
| Mechanics/material | ||
| Enclosure material (front) | ||
| ● Plastic | Yes | |
| Dimensions | ||
| Width | 38 mm | |
| Height | 62 mm | |
| Depth | 21 mm | |
| Weights | ||
| Weight, approx. | 40 g | |
