| 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 |
Malaysia
