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Siemens 6ES7157-0AD82-0XA0 SIMATIC DP/PA Coupler Ex [ia]

Siemens 6ES7157-0AD82-0XA0 SIMATIC DP/PA Coupler Ex [ia]

Product Name: SIMATIC DP/PA Coupler Ex [ia]

Brand Name: Siemens

Model Number: 6ES7157-0AD82-0XA0

Place of Origin: Germany

Warranty: 12 Months

Whatsapp: +86 18020776782

Email: [email protected]

Appurtenance:

Overview
PA Integration
Description
Installation
Specifications
Commercial Term
Contact info
FAQ
Other Products
Recommended Products

Intrinsically safe PROFIBUS PA coupling for hazardous-area field instrumentation

The Siemens DP/PA Coupler Ex [ia] connects a PROFIBUS DP segment to a 31.25 kbit/s PROFIBUS PA segment while supplying up to 110 mA for approved PA field devices. It is intended for process installations that require FISCO-compatible intrinsic safety.

Segment engineering check: Confirm product state 02 or later, 24 V DC SELV supply, PA current budget, field-device intrinsic-safety data, hazardous-area approvals, bus length, shield bonding and segment termination before purchase.

PA Integration

The coupler must be engineered together with the complete PA segment and its intrinsic-safety documentation.

Current budget

Add the operating current of every field device and include cable losses and approved reserve; the coupler output is limited to 110 mA.

Bus design

Verify trunk and spur lengths, two valid terminators, shield continuity and the 31.25 kbit/s PA topology before commissioning.

Safety parameters

Confirm that every PA device and cable satisfies the official Li, Ci, Ui and Ii limits and the selected FISCO or entity concept.

Description

6ES7157-0AD82-0XA0 converts the DP transmission rate to the PROFIBUS PA rate and provides galvanic isolation between the 24 V supply, PROFIBUS DP and PROFIBUS PA interfaces. The official product information permits up to 31 PA field devices when the current and safety limits are satisfied.

A replacement must be reviewed as part of the complete intrinsically safe segment. Record the connected field devices, cable parameters, spur layout, terminators, supply voltage, enclosure conditions and product-state label before removing the installed coupler.

Installation

Hazardous-area service requires controlled installation, grounding and documentation rather than a simple like-for-like visual exchange.

Supply and isolation

Use the specified 24 V DC SELV source and preserve the required electrical separation from the non-intrinsically safe DP side.

Mechanical review

Check enclosure protection, ventilation, mounting clearance, strain relief and terminal condition before energizing the replacement.

Acceptance test

Verify DP communication, PA segment voltage, field-device visibility and diagnostics before returning the process loop to service.

Specifications

Product type designation	SIMATIC DP/PA Coupler Ex [ia]
Order number	6ES7157-0AD82-0XA0
Primary function	PROFIBUS DP to PROFIBUS PA coupling
PA transmission rate	31.25 kbit/s
PA output voltage	Typically 13.5 V DC
PA output current	Maximum 110 mA
Supply voltage	24 V DC from a SELV source
Connected PA devices	Up to 31, subject to current and safety limits
Degree of protection	IP20
Operating temperature	-25 to +60 degrees C
Dimensions	80 x 125 x 130 mm
Net weight	Approximately 550 g

Commercial Term

Quotation

Current price and availability

Payment

T/T or agreed terms

Lead time

Confirmed with quotation

Shipping

DHL, FedEx, UPS or agreed freight

Warranty

12 months

Contact info

CONTACT

Jim Pei

[email protected]

+86 180 2077 6782

FAQ

Can 6ES7157-0AD82-0XA0 replace an older 6ES7157-0AD00-0XA0 without revalidating the PA loop?

No. The newer coupler has an intrinsic-safety short-circuit current of 247 mA instead of 215 mA. Older field devices or loop approvals may be limited to 215 mA, so the FISCO or entity calculation and the plant safety dossier must be approved again before substitution.

Where must 6ES7157-0AD82-0XA0 be positioned in a PROFIBUS PA segment?

Install it at the beginning or the end of the PA segment. Its internal PA bus terminator cannot be switched off, so placing it in the middle can create an extra termination and cause low signal amplitude or intermittent device loss.

How many PA field devices can 6ES7157-0AD82-0XA0 actually power from its 110 mA output?

The catalogue limit of 31 devices is not the working design limit for every loop. Add the normal current of each device, cable loss and an engineering reserve, then confirm that the total stays below 110 mA and that every Li, Ci, Ui, Ii and Pi value remains within the approved intrinsic-safety calculation.

Can 6ES7157-0AD82-0XA0 be mounted directly in Zone 1 or Zone 21?

Do not treat the module and the PA field circuit as having the same installation permission. The coupler is a category 3G PROFIBUS node for Zone 2 or a safe area; installation for dust zones requires an enclosure certified for the applicable zone, while the intrinsically safe PA circuit may extend to approved field equipment in Zone 0 or Zone 20.

Why does 6ES7157-0AD82-0XA0 show DP activity while every PA instrument is offline?

Use the ON, DP and PA indications to separate supply, DP-side and PA-side faults. If ON and DP are active but PA is not, measure the PA output, confirm polarity, one valid termination at the far end, cable continuity and the 110 mA load before changing the coupler.

May I connect a commissioning tool or another DP device to 6ES7157-0AD82-0XA0 while it operates with an IM 157?

No. In that operating mode the DP interface is permitted only for passive bus monitoring. Siemens does not permit parameterization equipment or an additional DP device on that interface, so commissioning must use the approved system path rather than the coupler port.

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