This document provides information about the RS 485 repeater in the S7-300 module data manual, including its purpose, functions, grounding operations, technical data, and block diagram. It also includes information about the diagnostic repeater related to the RS 485 repeater.
This handbook provides detailed information about the Siemens RS485 repeater (part number 6ES7 972-0AA01-0XAO). It describes the repeater’s purpose, wiring, grounded and ungrounded operation, and includes technical data and block diagrams.
The document also lists maximum cable lengths for different transmission rates, the number of repeaters that can be cascaded, and electrical isolation features, helping users design reliable RS485 networks in industrial environments. This manual is written in Chinese.
| Rated supply voltage | 24 VDC |
|---|---|
| Supply voltage range | 20.4 VDC to 28.8 VDC |
| Current consumption (no load on PG/OP) | 100 mA |
| Current consumption (load on PG/OP) | 130 mA |
| Electrical isolation rating | 500 VAC |
| Fiber optic connection | Supported via repeater adapter |
| Protection class | IP20 |
| Dimensions (W×H×D) | 45 mm × 128 mm × 67 mm |
| Weight (incl. packaging) | 350 g |
| Supported transmission rates | 9.6 kbps – 12 Mbps (auto‑detected) |
Up to nine repeaters can be connected in series.
The maximum distance is 4 000 m.
The repeater is rated for a 24 VDC supply.
Yes, it provides isolation up to 500 VAC.