Siemens 6ES7197-1LB00-0XA0 SIMATIC S7 Y-Coupler for Redundant Y-Link

Overview

SIEMENS INDUSTRIAL AUTOMATION

Siemens 6ES7197-1LB00-0XA0 SIMATIC S7 Y-Coupler for Redundant Y-Link

Y-coupler for a PROFIBUS DP Y-Link with redundant controllers.

At a Glance

Brand	Siemens
Model	6ES7197-1LB00-0XA0
Product Type	SIMATIC S7 Y-coupler
Core Function	Connects a lower-level DP system through a Y-Link
Compatible Series	Redundant PROFIBUS DP controller systems

Identification

SIMATIC S7 Y-coupler for a redundant-controller Y-Link.

Bus Interface

Lower-level PROFIBUS DP at 45.45 kbit/s to 12 Mbit/s.

Configuration

Select the bus module, termination and permitted DP-device count for the installation.

Product Overview

6ES7197-1LB00-0XA0 is a SIMATIC S7 Y-coupler used to set up a Y-Link for redundant controllers. The lower-level PROFIBUS DP system supports transmission rates from 45.45 kbit/s to 12 Mbit/s.

Ordering focus: check the Y-Link architecture, bus module power feed and lower-level DP-device count before replacement.

Key Functions

Redundant-system coupling

Builds the Y-Link connection used with redundant controllers.

PROFIBUS DP network

Supports a lower-level DP master system with transmission rates up to 12 Mbit/s.

System diagnostics

Provides a diagnostics function for the coupled DP system.

Official Specifications

Power Supply Design	Via bus module
Permissible DC Voltage	20.4 to 28.8 V
Maximum Current Consumption	300 mA
Typical Power Loss	1 W
Lower-Level DP Transmission Rate	45.45 kbit/s to 12 Mbit/s
Lower-Level DP Termination	Active bus terminating resistor
RS 485 Repeaters	Up to 9
DP Device Capacity	31; up to 64 with RS 485 repeaters or OLM/OBT
Parameter Assignment Telegram	244 bytes
Electrical Isolation	Lower-level DP master system isolated
Protection Rating	IP20
Dimensions	40 × 125 × 130 mm
Approximate Weight	200 g

Official source: Siemens technical document for 6ES7197-1LB00-0XA0.

Frequently Asked Questions

Can I use 6ES7197-1LB00-0XA0 to build a Y-Link for redundant controllers?

The coupler is designed for a Y-Link in a redundant-controller arrangement.

Which PROFIBUS DP speeds can I configure with 6ES7197-1LB00-0XA0?

The lower-level DP system operates from 45.45 kbit/s to 12 Mbit/s.

How many DP devices can 6ES7197-1LB00-0XA0 serve without repeaters?

The lower-level DP system permits up to 31 DP devices without repeaters.

Can I expand the DP-device count connected through 6ES7197-1LB00-0XA0?

The documented limit rises to 64 devices when RS 485 repeaters or OLM/OBT are used.

How is 6ES7197-1LB00-0XA0 supplied with power?

The coupler receives its supply through the bus module within the 20.4 to 28.8 V DC range.

Does 6ES7197-1LB00-0XA0 provide diagnostic information?

The coupler has a diagnostics function for the lower-level DP system.

What enclosure protection should I provide for 6ES7197-1LB00-0XA0?

The IP20 rating calls for installation in a suitable protected enclosure.

Compatibility & Ordering Notes

Before ordering 6ES7197-1LB00-0XA0: confirm the redundant Y-Link topology, bus-module supply, termination and DP-device count against the installed network.

Compatibility checklist

• Use this Y-coupler within the specified redundant-controller Y-Link arrangement; verify the installed bus module.
• Check that the bus-module supply remains within 20.4–28.8 V DC and that the lower-level PROFIBUS DP segment is terminated correctly.
• Count the connected DP devices: up to 31 without repeaters, or up to 64 with the documented RS 485 repeaters or OLM/OBT.
• Match the lower-level DP transmission rate to the documented 45.45 kbit/s–12 Mbit/s range and provide an enclosure suitable for IP20 equipment.

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