Rockwell Automation 1751-SLBP Installation Instructions

Installation Instructions

SynchLink Bypass Switch Block

Catalog Number 1751-SLBP

This document describes how to install and use the 1751-SLBP SynchLink bypass
switch block.

Topic Page

Important User Information 2
SynchLink Overv iew 4
Installing the Bypass Switch Block 5
Wiring the Bypass Switch Block 8
Indicators 9
Mounting Dimensions 10
Hazardous Location 11
Rockwell Automation Support 12
Specifications 13

Related Publications

Publication Title Publication Number

SynchLink Base Block Installation Instructions 1751-IN001A-EN-P SynchLink 4-port Splitter Block Installation Instructions 1751-IN002A-EN-P SynchLink Bypass Switch Block Installation Instructions 1751-IN003A-EN-P ControlLogix SynchLink Module Installation Instructions 1756-IN575A-EN-P SynchLink System Overview 1756-SO008A-EN-P ControlLogix SynchLink Module User Manual 1756-UM521A-EN-P

Publication 1751-IN003B-EN-P - September 2001

2 SynchLink Bypass Switch Block

WARNING

!

ATTENTION

!

IMPORTANT

Important User Information

Because of the variety of uses for the products described in this publication, those
responsible for the application and use of these products must satisfy themselves
that all necessary steps have been taken to assure that each application and use
meets all performance and safety requirements, including any applicable laws,
regulations, codes and standards. In no event will Allen-Bradley be responsible or
liable for indirect or consequential damage resulting from the use or application of
these products.

Any illustrations, charts, sample programs, and layout examples shown in this
publication are intended solely for purposes of example. Since there are many
variables and requirements associated with any particular installation, Allen-B radley
does not assume responsibility or liability (to include intellectual property liability)
for actual use based upon the examples shown in this publication.

Allen-Bradley publication SGI-1.1, Safety Guidelines for the Application, Installation
and Maintenance of Solid-State Control (available from your local Allen-Bradley
office), describes some important differences between solid-state equipment and
electromechanical devices that should be taken into consideration when applying
products such as those described in this publication.

Reproduction of the contents of this copyrighted publication, in whole or part,
without written permission of Rockwell Automation, is prohibited.

Throughout this publication, notes may be used to make you aware of safety
considerations. The following annotations and their accompanying statements help
you to identify a potential hazard, avoid a potential hazard, and recognize the
consequences of a potential hazard:

Publication 1751-IN003B-EN-P - September 2001

Identifies information about practices or circumstances that
can cause an explosion in a hazardous environment, which
may lead to personal injury or death, property damage, or
economic loss.

Identifies information about practices or circumstances that
can lead to personal injury or death, property damage, or
economic loss.

Identifies information that is critical for successful application
and understanding of the product.

SynchLink Bypass Switch Block 3

ATTENTION

!

Environment and Enclosure

This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications
(as defined in IEC publication 60664-1), at altitudes up to 2000
meters without derating.

This equipment is considered Group 1, Class A industrial
equipment according to IEC/CISPR Publication 11. Without
appropriate precautions, there may be potential difficulties
ensuring electromagnetic compatibility in other environments
due to conducted as well as radiated disturbance.

This equipment is supplied as "open type" equipment. It must
be mounted within an enclosure that is suitably designed for
those specific environmental conditions that will be present
and appropriately designed to prevent personal injury resulting
from accessibility to live parts. The interior of the enclosure
must be accessible only by the use of a tool. Subsequent
sections of this publication may contain additional information
regarding specific enclosure type ratings that are required to
comply with certain product safety certifications.

See NEMA Standards publication 250 and IEC publication
60529, as applicable, for explanations of the degrees of
protection provided by different types of enclosure. Also, see
the appropriate sections in this publication, as well as the
Allen-Bradley publication 1770-4.1 ("Industrial Automation
Wiring and Grounding Guidelines"), for additional installation
requirements pertaining to this equipment.

Publication 1751-IN003B-EN-P - September 2001

4 SynchLink Bypass Switch Block

SynchLink Overview

W e designed the SynchLink system to provide the synchronization and coordination
of drive and motion control applications that are based on ControlLogix and
PowerFlex 700s stations.

About the SynchLink Bypass Switch Block

Use the SynchLink bypass switch block in SynchLink daisy-chain configuration
where a station, or group of stations, needs to be temporarily disconnected from
the SynchLink system without physical re-configuration of the cable system. The
bypass switch block is DIN rail-mounted and is housed in a two-piece plastic
enclosure. Figure 1 identifies the components of the bypass switch block.

Figure 1 - Components of the bypass switch block

RxIN2

Indicators

+24V dc
(pin 4)

+24V dc
Common (pin 3)

+24V dc Digital
Input (pin 2)

+24V dc

Common Digital

Input (pin 1)

RxIN1

TxOUT1

Din Rail Lock Tab

The bypass switch block has two modes of operation, pass-through and bypass.
The operational mode is determined by the state of the 24V dc digital input that is
driven by the local SynchLink station.

The pass-through mode is entered when the digital input is ON. In this mode,
optical signals from the upstream station are received at the receiver port RxIN1
and retransmitted to the local station via the transmitter port TxOUT2. Optical
signals generated by the local station are received at the receiver port RxIN2 and
retransmitted to the downstream station via the transmitter port TxOUT1. There is
no re-timing or signal regeneration in this mode.

The bypass mode is entered when the digital input is OFF. In this mode, signals
received from the upstream station at the port RxIN1 are converted to electrical
signals, re-timed, and retransmitted to the downstream station via the port TxOUT1.

The bypass switch block has no capabilities to detect or correct communication
error conditions that may exist during the course of pass-through or bypass
operation. The bypass switch block has no ability to report any abnormal
conditions to the local station.

TxOUT2

31223-M

Publication 1751-IN003B-EN-P - September 2001

SynchLink Bypass Switch Block 5

ATTENTION

!

Prevent Electrostatic Discharge

This equipment is sensitive to electrostatic discharge, which
can cause internal damage and affect normal operation.
Follow these guidelines when you handle this equipment:

• Touch a grounded object to discharge potential static.

• Wear an approved grounding wriststrap.

• Do not touch connectors or pins on component boards.

• Do not touch circuit components inside the equipment.

• If available, use a static-safe workstation.

• When not in use, store the equipment in appropriate

static-safe packaging.

Installing the Bypass Switch Block

To install the switch block on the DIN rail:

1. Position the switch block on the 35×7.5mm DIN rail (Allen-Bradley catalog

number 199-DRI) at a 30° angle.

31203a-M

Publication 1751-IN003B-EN-P - September 2001