This manual contains information on the operation, functions and technical data of the S7-300 signal modules, power modules and interface modules.
This manual is the reference for all S7-300 modules. It contains general technical data, safety instructions, part numbers, dimensions, spare parts, ESD handling rules and service contacts. The document is intended for qualified personnel who install, configure or maintain S7-300 systems.
The contents are organized by module type – power, digital, analog, other signal, interface and RS‑485 repeater – and include detailed parameter tables, wiring diagrams, diagnostic messages and environmental specifications such as IP rating and EMC compliance. This manual is written in Chinese.
| Power module PS 305 current rating | 2 A |
|---|---|
| Digital input module SM 321 channels | 32 × DC 24 V |
| Digital output module SM 322 rating | 32 × DC 24 V / 0.5 A |
| Analog input module SM 331 resolution | 8 × 13 bit |
| Protection class | IP 20 |
Power modules PS 305 (2 A), PS 307 (2 A, 5 A, 10 A) are listed with their part numbers.
The modules have a protection rating of IP 20.
Analog input modules are identified as SM 331 with configurations such as AI 8 × 13 bit (part number 6ES7 331‑1KF01‑0AB0).