| Product type designation | CM 1243-5 |
| Communication module CM 1243-5 for connection of SIMATIC S7-1200 to PROFIBUS as DP Master module; PG/OP communication; S7 communication |
| Transmission rate |
| Transfer rate | |
| at the 1st interface / acc. to PROFIBUS | 9.6 kbit/s ... 12 Mbit/s |
| Interfaces |
| Number of interfaces / acc. to Industrial Ethernet | 0 |
| Number of electrical connections | |
| at the 1st interface / acc. to PROFIBUS | 1 |
| for power supply | 1 |
| Type of electrical connection | |
| at the 1st interface / acc. to PROFIBUS | 9-pin Sub-D socket (RS485) |
| for power supply | 3-pole terminal block |
| Supply voltage, current consumption, power loss |
| Type of voltage / of the supply voltage | DC |
| Supply voltage / external | 24 V |
| Supply voltage / external / at DC / Rated value | 24 V |
| Relative positive tolerance / at DC / at 24 V | 20 % |
| Relative negative tolerance / at DC / at 24 V | 20 % |
| Consumed current | |
| from external supply voltage / at DC / at 24 V / typical | 0.1 A |
| Power loss [W] | 2.4 W |
| Permitted ambient conditions |
| Ambient temperature | |
| for vertical installation / during operation | 0 ... 45 °C |
| for horizontally arranged busbars / during operation | 0 ... 55 °C |
| during storage | -40 ... +70 °C |
| during transport | -40 ... +70 °C |
| Relative humidity / at 25 °C / without condensation / during operation / maximum | 95 % |
| Protection class IP | IP20 |
| Design, dimensions and weight |
| Module format | Compact module S7-1200 single width |
| Width | 30 mm |
| Height | 100 mm |
| Depth | 75 mm |
| Net weight | 0.134 kg |
| Mounting type | |
| 35 mm DIN rail mounting | Yes |
| S7-300 rail mounting | No |
| wall mounting | Yes |
| Product properties, functions, components / general |
| Number of units | |
| per CPU / maximum | 3 |
| Performance data / PROFIBUS DP |
| Service / as DP master | |
| DPV1 | Yes |
| Number of DP slaves / on DP master / usable | 16 |
| Amount of data | |
| of the address area of the inputs / as DP master / total | 512 byte |
| of the address area of the outputs / as DP master / total | 512 byte |
| of the address area of the inputs / per DP slave | 244 byte |
| of the address area of the outputs / per DP slave | 244 byte |
| of the address area of the diagnostic data / per DP slave | 240 byte |
| Service / as DP slave | |
| DPV0 | No |
| DPV1 | No |
| Performance data / S7 communication |
| Number of possible connections / for S7 communication | |
| maximum | 8 |
| with PG connections / maximum | 1 |
| with PG/OP connections / maximum | 3 |
| Note | max. 4 connections to other S7 stations |
| Performance data / multi-protocol mode |
| Number of active connections / with multi-protocol mode | |
| without DP / maximum | 8 |
| with DP / maximum | 8 |
| Performance data / telecontrol |
| Protocol / is supported | |
| TCP/IP | No |
| Product functions / management, configuration |
| Configuration software | |
| required | STEP 7 Basic/Professional |
