Allen-Bradley 857-RAA User manual

Brand: Allen-Bradley

Model: 857-RAA

Type: User manual

This manual is also suitable for

857-RAD

Allen-Bradley 857-RAA is a 12 channel RTD scanner that connects to the base 857 relay via a single ST-type glass fiber optic cable. It is powered by 48...264V AC/DC, 50/60Hz and uses single-glass, fiber-optic communication. The 857-RAA can be mounted remotely up to 2000m from the base 857 relay. It is an ideal solution for applications that require accurate and reliable temperature measurement. The 857-RAA is commonly used in industrial settings, such as power plants, factories, and warehouses, to monitor the temperature of critical equipment.

857-RAA/857-RAD RTD Scanner

Catalog Numbers 857-RAA, 857-RAD

User Manual

Original Instructions

Important User Information

Read this document and the documents listed in the additional resources section about installation, configuration, and

operation of this equipment before you install, configure, operate, or maintain this product. Users are required to

familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,

and standards.

Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are

required to be carried out by suitably trained personnel in accordance with applicable code of practice.

If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may

be impaired.

In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from

the use or application of this equipment.

The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and

requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or

liability for actual use based on the examples and diagrams.

No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or

software described in this manual.

Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,

Inc., is prohibited

Throughout this manual, when necessary, we use notes to make you aware of safety considerations.

Labels may also be on or inside the equipment to provide specific precautions.

WARNING: 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.

ATTENTION: Identifies information about practices or circumstances that can lead to personal injury or death, property

damage, or economic loss. Attentions help you identify a hazard, avoid a hazard, and recognize the consequence.

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

SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous

voltage may be present.

BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may

reach dangerous temperatures.

ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to

potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL

Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 3

Table of Contents

Preface

Summary of Changes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Chapter 1

Layout Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Catalog Number Explanation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Chapter 2

Application 857-RAA Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

857-RAD Scanner. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Communication Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

857-RAD DIP-Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

Chapter 3

Wiring Configurations RTD Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Recommended RTD Cable type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Current Inputs/Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Recommended RTD Cable type . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Thermistor (PTC) Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Chapter 4

Configure the Base 857 Relay Connect a Bulletin 857 Relay to PC. . . . . . . . . . . . . . . . . . . . . . . . . 17

Connect to the 857-RAA RTD Scanner . . . . . . . . . . . . . . . . . . . . . . . . 18

Protocol Configuration to Connect the 857-RAA to the 857 . 18

External I/O configuration for 857-RAA . . . . . . . . . . . . . . . . . . . . 19

RTD Inputs Quick Setup for 857-RAA . . . . . . . . . . . . . . . . . . . . . 20

Connect to the 857-RAD RTD Scanner . . . . . . . . . . . . . . . . . . . . . . . . 21

Protocol Configuration for 857-RAD RTD Scanner . . . . . . . . . 21

External I/O configuration for 857-RAD . . . . . . . . . . . . . . . . . . . 22

RTD Inputs Quick Setup for 857-RAD . . . . . . . . . . . . . . . . . . . . . 23

External Analog Inputs for 857-RAD . . . . . . . . . . . . . . . . . . . . . . . 24

Analog Input Settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

External Analog Outputs for 857-RAD Scanner . . . . . . . . . . . . . . . . . 26

Analog Output Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Chapter 5

Specifications Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

4 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Table of Contents

Appendix A

Configure the 857-RAD Analog

Outputs

Example #1 – mA Output Scaling for IL. . . . . . . . . . . . . . . . . . . . . 35

Example #2 – mA Output Scaling for ULine. . . . . . . . . . . . . . . . . 36

Example #3 – mA Output Scaling for Bidirectional Power . . . . 37

Appendix B

Construction and Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 5

Preface

This manual shows you how to install, wire, and program the Bulletin 857

relay, using the SetPointPS programming and configuration software tool, and

how to configure either RTD scanner.

Summary of Changes

This publication contains new and updated information as indicated in the

following table.

Additional Resources

These documents contain additional information concerning related products

from Rockwell Automation.

You can view or download publications at http://

www.rockwellautomation.com/global/literature-library/overview.page. To

order paper copies of technical documentation, contact your local Allen-

Bradley distributor or Rockwell Automation sales representative.

Topic Page

Added small section on terminal switches 12

Added footnote about RTD channels 20

Replaced Appendix A on Analog Outputs 35

Resource Description

857 Protection System for Feeder and Motor

Protection, Series A, publication 857-UM001

Provides information on parameters, installation, dimensions,

troubleshooting, control functions, and specifications

SetPointPS Configuration Software Programming

Manual, publication 857-PM001

Provides information on configuring, setting up,

troubleshooting, and using the SetPointPS communication

software

857 Protection System for Feeder and Motor

Protection Quick Start, publication 857-QS001

Provides information on mounting, wiring, and installation of

the 857 relay

857 Protection System Specification Guide,

publication 857-SR001

Provides specifications on protective features, measuring and

monitoring, arc flash protection, and cold load pickup

monitoring

857-VPA3CG PROFIBUS DP Option Module,

publication 857-UM003

Provides information on the PROFIBUS option modules,

including installation, commissioning, dimensions, and

specifications

Product Certifications website, http://

www.rockwellautomation.com/global/

certification/overview.page

Provides declarations of conformity, certificates, and other

certification details.

6 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Preface

Notes:

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 7

Chapter 1

Layout

Overview

The Allen-Bradley™ Bulletin 857-RAA and 857-RAD are both 12 channel

RTD scanners. The 857-RAD enhanced scanner also provides support for a

PTC (thermistor) input along with four programmable 0…25 mA current

input channels and four programmable 0…25 mA current output channels that

can be programmed for any analog scale (for example, 0…1mA, 4…20mA,

1…5mA, and so on). Both the 857-RAA and 857-RAD are connected to the

Bulletin 857 relay via ST-type glass fiber optic cables; the 857-RAA uses one

fiber optic cable (only TX) while the 857-RAD uses a dual fiber optic cable

configuration (TX and RX).

The RTD scanners can also be mounted remotely up to 2000 m from the base

857 relay.

Catalog Number Explanation

123

857 R A A

abc

Scanner Connectivity

R Connection to base 857 relay

Basic Scanner Capabilities

A 12 Channel RTD Scanner

Supply Voltage, Communications Method, and Capabilities

48…264V AC/DC, 50/60Hz

Input power: single-glass, fiber-optic communication

48…264V AC/DC, 50/60Hz

Input power: RS-485 communication

24V DC input power. Comes with 4+4 configurable mA

outputs/inputs, dual-glass, fiber-optic communications

48…264V AC/DC, 50/60 Hz input power. Comes with 4+4

configurable mA outputs/inputs, dual-glass, fiber-optic

communications

8 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 1 Layout

Figure 1 - 857-RAA and 857-RAD Configuration

Figure 2 - 857-RAA RTD Scanner Layout

1. Grounded metal enclosure

2. Glass fiber Tx communication

3. Not used on this model

4. RTD inputs (12 channels, 3-wire connection + shield / channel)

5. Power connector and earthing connection

6. DIN rail mounting

Fiber Optic Connection

Fiber Optic Connections

857-RAD

857-RAA

12 RTD Channels

4 Configurable Analog Inputs

4 Configurable Analog Outputs

1 PTC Input

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 9

Layout Chapter 1

Figure 3 - 857-RAD RTD Scanner with mA inputs/outputs

1. Grounded metal enclosure

2. Glass Fiber Rx communication

3. Glass Fiber Tx communication

4. Not used on this model

5. Not used on this model

6. Address DIP switch

7. RTD inputs (12 channels, 3-wire connection + shield / channel)

8. Power connector and earthing connection

9. PTC input (2-wire connection)

10. Four mA inputs / four mA outputs (2-wire connection /channel)

11. DIN Rail mounting

10 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 1 Layout

Notes:

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 11

Chapter 2

Application

857-RAA Scanner

Figure 4 - Single Glass Fiber Connection to the Bulletin 857-RAA Scanner

857-RAD Scanner

Figure 5 - Dual Glass Fiber Connection to the 857-RAD Scanner and the 857 Relay

Fiber Optic Interface Module

mounted to the Option Module

857-RAA Fiber Tx

Multimode Fiber Optic Cable

•Diameter: 62.5/125 μm

•Connector Type: ST

857-RAA on Wall or DIN Rail

857-RAD Fiber Tx

Multimode Fiber Optic Cable

• Diameter: 62.5/125 μm

•Connector Type: ST

857-RAD on Wall or DIN Rail

857-RAD Fiber Tx

12 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 2 Application

Communication Settings

857-RAD DIP-Switches

The DIP switches allow you to configure communication settings that are

required by the application.

Figure 6 - DIP Switches

These are the termination switches related only to the RS-485 interface. Both

switches must be ON or OFF at the same time. They are not used with fiber

optic connections.

The portion of the address switch selects the slave address for the 857-RAD

scanner. The slave address must match the setting in the base 857 relay.

The switch position is ON when the switch is turned DOWNWARDS.

Table 1 - LE:1. Optical Fiber Communication Setup

Position Function

ON Light is on when there is data being sent.

OFF

(1)

(1) Default position.

Light is off when there is no data being sent.

Table 2 - LE:2. Optical Fiber Multi-slave Chain/Ring Topology Setup

Position Function

ON 857-RAD echoes the data received to the next device in the chain.

OFF

(1)

(1) Default position.

857-RAD does not echo to the next device in the chain.

Table 3 - Address Switch Block

Position Function

ON Selected single address bit is set to 1.

OFF Selected single address bit is set to 0.

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 13

Application Chapter 2

The address switch block is made up of 8 single switches. Their combination

provides the user with an address block of 256 addresses (0…255). However, it

is very important to note that the Modbus protocol that is used between the

RTD scanner and the base 857 relay restricts the use of addresses 0 and others

larger than 247 (decimal base).

For example, the address switch represents the RTDs address in its binary

notation.

5 (decimal) = 00000101 (binary)

(switch setting 1…8) = 10100000

Address Switch

OFF

12345678

14 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 2 Application

Notes:

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 15

Chapter 3

Wiring Configurations

RTD Connections

RTD connections are the same for all versions of the RTD Scanners. Figure 7

shows the proper way to connect RTDs.

Figure 7 - Connections of RTDs, Typical

Recommended RTD Cable type

Shielded non-paired control and instrumentation cable.

16 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 3 Wiring Configurations

Current Inputs/Outputs

Figure 8 - 857-RAD mA Input and mA Output Connections

The RTD channel number for each terminal connection can be confirmed by

viewing it from the top of the RTD scanner (see Figure 3

Recommended RTD Cable type

Shielded non-paired control and instrumentation cable.

Thermistor (PTC) Connections

Figure 9 - 857-RAD PTC Connection Location

mA Inputs mA Outputs

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 17

Chapter 4

Configure the Base 857 Relay

This section describes the configurations required to correctly set up a Bulletin

857 relay and one of the two optional RTD scanner modules available. There

are different hardware and setup configuration requirements depending on the

model of the RTD scanner used.

Connect a Bulletin 857 Relay to PC

Connect cable 857-VX003-3 to the front panel of the relay (Figure 7).

Figure 10 - Connecting Cable 857-VX003-3 to the Front Port on the 857 Relay

For more information about communication between Bulletin 857 relay and a

PC, refer to publication 857-UM001

and publication 857-PM001.

This manual is divided into two sections to setup the 857-RAA or 857-RAD.

See Connect to the 857-RAA RTD Scanner

on page 18 or Connect to the

857-RAD RTD Scanner on page 21.

IMPORTANT Many newer PCs do not have a serial port. A suitable USB to serial port

converter should be used. Rockwell Automation recommends the use of a

Bulletin 9300-USBS USB to Serial Port Adapter Kit.

18 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 4 Configure the Base 857 Relay

Connect to the 857-RAA RTD

Scanner

The 857-RAA RTD scanner module is connected to the Bulletin 857 relay

using one fiber optic cable interface module (VCM RTD). there are no

hardware settings required on the 857-RAA RTD scanner module.

Protocol Configuration to Connect the 857-RAA to the 857

Follow these steps to connect the 857-RAA to the base 857 relay.

1. Select Protocol Configuration in SetPointPS.

2. In the Extension Port protocol section, confirm External I/O is selected.

3. If it is not, click the pulldown menu and select External I/O.

IMPORTANT The unit Bulletin 857 relay must be equipped with a suitable optical

interface module (VCM RTD) to receive data from the 857-RAA scanner. One

of the communication ports must include an interface called VCM RTD

(Figure 5-3). See publication 857-UM001

for catalog number information.

IMPORTANT If a parameter is changed, it will be highlighted in red. This indicates that a

change has been made in the setup tool and this data must be uploaded into

the base relay. Once saved to the relay, the relay may request a reboot

(restart).

Rockwell Automation Publication 857-UM002C-EN-P - February 2018 19

Configure the Base 857 Relay Chapter 4

External I/O configuration for 857-RAA

Follow these steps to verify the correct external input device and external input

protocol are selected.

1. Under Protocol Configuration, select External I/O Configuration.

2. Click External I/O Device Type.

3. Click 857-RAA.

4. Click External I/O Protocol.

5. Click RTDinput.

The External I/O Bit Rate should be set to 9600 bits per second (bps) and the

Data Parity is always Even.

The 857-RAA input settings are shown in Tabl e 4

IMPORTANT If a parameter is changed, it will be highlighted in red. This indicates that a

change has been made and this data must be uploaded into the base relay.

Once saved to the relay, the relay may request a reboot (restart) depending

on the setting changed.

Table 4 - External I/O Configuration Settings

External I/O Device Type 857-RAA

External I/O Protocol

(1)

(1) After changing this parameter, you must restart the 857 base relay using SetPointPS or by cycling power the 857 base relay.

RTD Input

External I/O bit rate

(1)

9600

Parity

(1)

Even

20 Rockwell Automation Publication 857-UM002C-EN-P - February 2018

Chapter 4 Configure the Base 857 Relay

RTD Inputs Quick Setup for 857-RAA

In the External I/O Configuration of SetPointPS, you will find RTD Inputs-

Quick Setup. This interface makes individual RTD channel setup quick and

simple.

Once all the settings for the 857-RAA have been completed, all these new

setting values must be uploaded into the relay by using the depressing the Write

All Settings to the Device icon within the SetPointPS software interface. See

publication 857-PM001

. The alarm (start) and trip status information for each

channel enabled must be reviewed and mapped to an output device through

the Output Matrix in the 857 relay. See publication 857-UM001

for details of

the Output Matrix configuration.

Table 5 - RTD Inputs • Quick Setup Parameters

(1)

(1) Only the first 12 channels are used for RTD inputs. Channels 13…16 only used with 857-RAD.

Parameter Value(s) To Modify:

AI Enabled On / Off 1. Select the row of the channel you want to modify.

2. Choose the desired selection from the pulldown menu.

RTD Ch Cannot modify N/A

RTD Sensor Type Other..., Pt100, Ni100,

Ni120, Cu10

1. Select the row of the channel you want to modify.

2. Choose the desired selection from the pulldown menu.

RTD Sensor

Function

Off, WindingG, Bearing G,

Ambient, Other...

Alarm Limit >

(2)

(2) Units are in Celsius.

User-defined 1. Select the row of the channel you want to modify.

2. Enter the desired value on your keyboard.

3. Press Enter.

Trip Limit >>

(2)

User-defined

IMPORTANT If a parameter is changed, it will be highlighted in red. This indicates that a

change has been made and this data must be uploaded into the base relay.

Once saved to the relay, the relay may request a reboot (restart) depending

on the setting changed.

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Allen-Bradley 857-RAA User manual

Brand: Allen-Bradley

Model: 857-RAA

Type: User manual

This manual is also suitable for

857-RAD

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Allen-Bradley 857-RAA User manual

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Allen-Bradley 857-RAA User manual

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