Description
Siemens 6ES7972-0AC80-0XA0 Simatic S7 RS485-IS Coupler PROFIBUS-DP 4.2V
The Siemens 6ES7972-0AC80-0XA0 is a Simatic S7 RS485-IS Coupler that bridges a standard PROFIBUS-DP network to an intrinsically safe PROFIBUS RS 485-IS segment. It acts as an isolation safety barrier, preventing potentially ignition-capable energy from reaching the intrinsically safe (Ex) side — a requirement when PROFIBUS devices are installed in hazardous areas classified as Zone 1 or Zone 2 under ATEX and IECEx standards. The coupler mounts on a standard DIN rail and integrates directly into Simatic S7 automation systems.
Specifications & What's Included
- Part Number: 6ES7972-0AC80-0XA0
- Product Family: Siemens Simatic S7
- Function: PROFIBUS-DP to PROFIBUS RS 485-IS coupler / intrinsic safety barrier
- Uo (output voltage, IS side): 4.2V
- Io (output current, IS side): 93mA
- Po (output power, IS side): 0.1W
- Ui (input voltage): 4.2V
- Um (maximum voltage): AC 250V
- Operating temperature: -25°C to +60°C
- Intrinsic safety classification: Ex ia / Ex nA ib [ib] IIC T4 Gc
- ATEX certification: II 3 (2) G — KEMA 03 ATEX 1183 X
- IECEx certification: IECEx KEM 05.0018X
- FM and UL approvals visible on rating plate
- Country of manufacture: Germany
- Form factor: DIN rail module
- Interfaces: PROFIBUS-DP connector (DP1/DP2) on non-IS side; blue screw terminal block and DB9 connector on RS485-IS side
- Includes: coupler module only — no additional accessories
Applications
The RS 485-IS Coupler is used in process automation and industrial control systems where PROFIBUS-DP field devices must communicate with sensors, actuators, or instruments installed in hazardous locations — such as oil and gas facilities, chemical plants, pharmaceutical production areas, and other environments where explosive atmospheres may be present. By galvanically isolating the intrinsically safe bus segment from the standard PROFIBUS-DP backbone, the coupler allows Simatic S7 PLCs to reach field devices in Ex-rated zones without requiring explosion-proof enclosures for every device on the IS segment. This module is part of Siemens' long-established Simatic S7 platform, which has been a dominant architecture in European and global process and factory automation since the mid-1990s. The 6ES7972-0AC80-0XA0 is a current-generation variant of this coupler family, carrying ATEX, IECEx, FM, and UL approvals — making it suitable for global hazardous-area installations.
This Siemens 6ES7972-0AC80-0XA0 Simatic S7 RS485-IS Coupler has been inspected and is in good used condition. It was pulled from a working environment where it was actively in use. The housing is clean with minimal wear consistent with industrial service; the PROFIBUS connectors, terminal block, and DB9 interface all appear intact. Please view our photo set and contact us if you have any questions. Please note: We have multiple units in stock — yours may not be the one shown in the photos, however, it will be similar in condition and function.
Warranty Information
Additional Information
Brand: |
Siemens |
Model: |
6ES7972-0AC80-0XA0 |
MPN: |
6ES7972-0AC80-0XA0 |
Type: |
RS485-IS PROFIBUS Coupler / Intrinsic Safety Barrier |
SKU: |
52952 |
Product Family: |
Simatic S7 |
Function: |
Converts PROFIBUS-DP to PROFIBUS RS 485-IS (intrinsically safe) |
Interface 1: |
PROFIBUS-DP (non-intrinsically safe side) |
Interface 2: |
PROFIBUS RS 485-IS (intrinsically safe side) |
Uo (Output Voltage): |
4.2V |
Io (Output Current): |
93mA |
Po (Output Power): |
0.1W |
Ui (Input Voltage): |
4.2V |
Um (Max. Voltage): |
AC 250V |
Safety Classification: |
Intrinsically Safe (Ex ia) |
ATEX Certification: |
II 3 (2) G, Ex nA ib [ib] IIC T4 Gc |
IECEx Certification: |
IECEx KEM 05.0018X |
KEMA Certification: |
KEMA 03 ATEX 1183 X |
Hazardous Area Rating: |
Zone 1 / Zone 2 hazardous areas |
Country/Region of Manufacture: |
Germany |
Form Factor: |
DIN Rail Module |
Seller Notes: |
Unit only, no accessories. Pulled from working environment. |
Condition: |
Used – Pulled from Working Environment |
Condition Notes: |
Siemens 6ES7972-0AC80-0XA0 Simatic S7 RS485-IS Coupler inspected and in good used condition. Pulled from a working environment. Housing clean, connectors intact. Please contact us with any questions. |
California Prop 65 Warning: |
WARNING: This product can expose you to chemicals including lead and lead compounds, and DEHP (a phthalate), which are known to the State of California to cause cancer and birth defects or other reproductive harm. Go to P65Warnings.ca.gov |
