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Siemens 6ES7157-0AC83-0XA0 SIMATIC DP/PA Coupler FDC 157-0

Siemens 6ES7157-0AC83-0XA0 SIMATIC DP/PA Coupler FDC 157-0

Product Name: SIMATIC DP/PA Coupler FDC 157-0

Brand Name: Siemens

Model Number: 6ES7157-0AC83-0XA0

Place of Origin: Germany

Warranty: 12 Months

Whatsapp: +86 18020776782

Email: [email protected]

Appurtenance:

siemens 6es7157 0ac83 0xa0 simatic dp pa coupler fdc 157 0-1

Overview
Description
Redundant PA Design
Specifications
Installation & Service
Commercial Term
Contact info
FAQ
Other Products
Recommended Products

Redundancy-capable PROFIBUS DP-to-PA fieldbus coupler with integrated segment power and diagnostics

The FDC 157-0 converts the RS485 PROFIBUS DP physical layer at 45.45 kbit/s to PROFIBUS PA at 31.25 kbit/s. It electrically isolates the networks, supplies the PA segment, supports a 1 A PA load and can provide local diagnostics, ring redundancy or coupler redundancy.

Fieldbus topology check: Confirm stand-alone or DP/PA Link use, diagnostic address, PA segment current, termination, non-redundant or redundant bus module, ACT LED state and 24 V supply arrangement before replacing or expanding the installation.

Description

6ES7157-0AC83-0XA0 is the Siemens FDC 157-0 for linking PROFIBUS DP and PROFIBUS PA. With address 0, the coupler operates transparently and can replace 6ES7157-0AC82-0XA0 without configuration; diagnostics require the same nonzero address in the hardware configuration and at the DIL switches.

A redundant pair must use the BM FDC/FDC bus module and the correct RING setting. Before disturbing a live redundant segment, verify that the ACT LED on the coupler being removed is off, isolate its 24 V DC supply and preserve the PA termination and cable routing.

Redundant PA Design

The redundancy mode, bus module and segment termination must agree; a working pair can still be misconfigured at the DIL switches.

Ring redundancy

Use the BM FDC/FDC bus module with two FDC 157-0 couplers, set RING ON and document the active field-distributor ring.

Coupler redundancy

Use the same redundant bus module with RING OFF and preserve the AFS or center-feed topology and PA termination.

Live replacement

Remove only the inactive coupler, confirm ACT is off, disconnect its 24 V supply and then exchange the module.

Specifications

Product type designation	SIMATIC DP/PA Coupler FDC 157-0
Order number	6ES7157-0AC83-0XA0
PROFIBUS DP rate	45.45 kbit/s
PROFIBUS PA rate	31.25 kbit/s
PA output	31 V DC +/-1 V; maximum 1 A segment current
DP address	1 to 125 by DIL switch; 0 disables diagnostics
Supply voltage	24 V DC, 20.4 to 28.8 V
Power consumption	Maximum 2.3 A at 24 V DC
Power loss	Maximum 13.4 W
Diagnostics	SF, BF, DP, PA, ACT and ON LEDs; DP diagnostic records
Dimensions / weight	80 x 125 x 130 mm; approximately 515 g
PA device capacity	Up to 31 PA field devices within the 1 A current limit

Installation & Service

Commission power, address, PA wiring and diagnostics in a controlled sequence so a segment fault is not mistaken for a defective coupler.

Power and grounding

Use a safely isolated SELV supply; in an ungrounded system use separate isolated 24 V supplies when electrical isolation must be retained.

Address and mode

Match the PROFIBUS address in the project and DIL switches, then select the required redundancy mode before applying power.

Segment evidence

Record PA current, terminator position, field-device count, BF or SF indications and the local LifeList before changing wiring.

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

How can I confirm that 6ES7157-0AC83-0XA0 will replace the installed DP/PA coupler correctly?

Check the complete order number, bus module, stand-alone or DP/PA Link arrangement, PROFIBUS address, PA termination and redundancy mode. It can replace 6ES7157-0AC82-0XA0 transparently at address 0, but diagnostic or redundant operation requires project and switch settings.

What should I check before removing 6ES7157-0AC83-0XA0 from a redundant PA segment?

Verify that the ACT LED on the coupler to be removed is not illuminated, confirm the partner coupler is healthy and disconnect the selected coupler from its 24 V DC supply. Label PA, DP and bus-module positions before moving any connection.

Why can 6ES7157-0AC83-0XA0 show a PROFIBUS DP fault after installation?

Compare the configured address with the DIL-switch address and confirm the DP master uses 45.45 kbit/s. Then check the DP connector, cable termination, selected redundancy mode and whether diagnostics were intentionally enabled with an address above 0.

Why can the PA LED or SF LED indicate a fault on 6ES7157-0AC83-0XA0?

Measure the PA segment load and voltage, confirm the total field-device current stays within 1 A, inspect for a short circuit or wire break and verify both end terminators. Read the local LifeList and diagnostic record before disconnecting devices.

How should I power 6ES7157-0AC83-0XA0 in an ungrounded installation?

Use an approved SELV 24 V DC supply and review the plant grounding concept. If an IM 153-2 and the coupler share one supply, electrical isolation can be cancelled; use two electrically isolated supplies where the isolation must be preserved.

What must be preserved when commissioning a replacement 6ES7157-0AC83-0XA0?

Record the former address, RING setting, bus-module type, ACT state, PA terminator position, segment current, connected field devices and diagnostic messages. Restore these items first, then verify DP communication, PA voltage and redundancy behavior.

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