Allen-Bradley FLEX I/O 1794-IP4 User manual

User
Manual
FLEX I/O 4 Input
Pulse Counter
Module
(Cat. No. 1794-IP4)
Allen-Bradley
Allen-Bradley HMIs

Because of the variety of uses for the products described in this
publication, those responsible for the application and use of this control
equipment 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.
The illustrations, charts, sample programs and layout examples shown in
this guide are intended solely for example. Since there are many
variables and requirements associated with any particular installation,
Allen-Bradley 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 which 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
in part, without written permission of Allen–Bradley Company, Inc.
is prohibited.
Throughout this manual we make notes to alert you to possible injury to
people or damage to equipment under specific circumstances.
!ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death,
property damage, or economic loss.
Attention helps you:
•identify a hazard
•avoid the hazard
•recognize the consequences
Important: Identifies information that is especially important for
successful application and understanding of the product.
Important: We recommend you frequently backup your application
programs on appropriate storage medium to avoid possible
data loss.
DeviceNet, DeviceNetManager, and RediSTATION are trademarks of Allen-Bradley Company, Inc.
PLC, PLC–2, PLC–3, and PLC–5 are registered trademarks of Allen-Bradley Company, Inc.
Windows is a trademark of Microsoft.
Microsoft is a registered trademark of Microsoft
IBM is a registered trademark of International Business Machines, Incorporated.
All other brand and product names are trademarks or registered trademarks of their respective companies.
Important User Information


Publication 1794-6.5.16 – September 1998

This manual shows you how to use your FLEX I/O pulse counter
module with Allen-Bradley programmable controllers. The manual
helps you install, program and troubleshoot your module.
You must be able to program and operate an Allen-Bradley
programmable controller to make efficient use of your FLEX I/O
module. In particular, you must know how to program block
transfers.
We assume that you know how to do this in this manual. If you do
not, refer to the appropriate programming and operations manual
before you attempt to program your modules.
In this manual, we refer to:
–the pulse counter module as the “input module”
–the Programmable Controller as the “controller”
This manual is divided into seven chapters. The following chart lists
each chapter with its corresponding title and a brief overview of the
topics covered in that chapter.
Chapter Title Contents
1Overview of FLEX I/O and the
Pulse Counter Module Describes FLEX I/O pulse counter modules, features, and how they function
2How to Install Your Pulse Counter
Module How to install and wire the module
3Module Programming Explains block transfer programming, sample programs
4Writing Configuration to and
Reading Status From with a
Remote I/O Adapter
Explains how to configure your modules and read status
information from your modules when using a remote I/O
adapter
5How Communication Takes Place
and I/O Image Table Mapping
with the DeviceNet Adapter
Explains how you communicate with your modules, and
how the I/O image is mapped when using a DeviceNet
adapter
6Calibrating Your Pulse Counter
Module How to calibrate the module.
7Troubleshoot Your Pulse Counter
Module How to use the indicators to troubleshoot your module.
Appendix Title Contents
ASpecifications Specifications for the pulse counter module
Purpose of this Manual
Audience
Vocabulary
Manual Organization
Allen-Bradley HMIs

Using This ManualP–2
Publication 1794-6.5.16 – September 1998
We use these conventions in this manual:
In this manual, we show: Like this:
that there is more information about a topic
in another chapter in this manual
that there is more information about the
topic in another manual More
For additional information on FLEX I/O systems and modules, refer
to the following documents:
Catalo
Volta e
Descr pt on
Publications
Catalo
g
Number Voltage Description Installation
Instructions User Manual
1794 1794 FLEX I/O Product Data 1794-2.1
1794-ACN 24V dc ControlNet Adapter 1794-5.8
1794-ACNR 24V dc Redundant Media ControlNet Adapter 1794-5.18
1794-ACN15 24V dc ControlNet Adapter 1794-5.47
1794-ACNR15 24V dc Redundant Media ControlNet Adapter 1794-5.48
1794-ADN 24V dc DeviceNet Adapter 1794-5.14 1794-6.5.5
1794-ASB/C 24V dc Remote I/O Adapter 1794-5.50 1794-6.5.9
1794-ASB2/B 24V dc 2-Slot Remote I/O Adapter 1794-5.44 1794-6.5.13
1794-APB 24V dc Profibus Adapter 1794-5.40 1794-6.5.6
1794-IB8 24V dc 8 Sink Input Module 1794-5.30
1794-OB8 24V dc 8 Source Output Module 1794-5.31
1794-IB16 24V dc 16 Sink Input Module 1794-5.4
1794-OB16 24V dc 16 Source Output Module 1794-5.3
1794-IV16 24V dc 16 Source Input Module 1794-5.28
1794-OV16 24V dc 16 Sink Output Module 1794-5.29
1794-OB8EP 24V dc 8 Electronically Fused Output Module 1794-5.20
1794-IB8S 24V dc Sensor Input Module 1794-5.7
1794-IB10XOB6 24V dc 10 Input/6 Output Module 1794-5.24
1794-IE8 24V dc Selectable Analog 8 Input Module 1794-5.6
1794-OE4 24V dc Selectable Analog 4 Output Module 1794-5.5 1794-6.5.2
1794-IE4XOE2 24V dc 4 Input/2 Output Analog Module 1794-5.15
Table continued on next page
Conventions
For Additional Information

Using This Manual P–3
Publication 1794-6.5.16 – September 1998
Publications
DescriptionVoltage
Catalog
Number User Manual
Installation
Instructions
DescriptionVoltage
Catalog
Number
1794-OF4 24V dc 4 Output Isolated Analog Module 1794-5.37
1794-IF4 24V dc 4 Input Isolated Analog Module 1794-5.38 1794-6.5.8
1794-IF2XOF2 24V dc 2 Input/2 Output Isolated Analog Module 1794-5.39
1794-IR8 24V dc 8 RTD Input Analog Module 1794-5.22 1794-6.5.4
1794-IT8 24V dc 8 Thermocouple Input Module 1794-5.21 1794-6.5.7
1794-IRT8 24V dc 8 Thermocouple/RTD Input Module 1794-5.50 1794-6.5.12
1794-IJ2 24V dc 2 Frequency Input Module 1794-5.49 1794-6.5.11
1794-ID2 24V dc 2 Channel Pulse Counter Module 1794-5.63 1794-6.5.15
1794-IC16 48V dc 48V dc 16 Input Module 1794-5.53
1794-OC16 48V dc 48V dc Output Module 1794-5.54
1794-IA8 120V ac 8 Input Module 1794-5.9
1794-OA8 120V ac 8 Output Module 1794-5.10
1794-IA8I 120V ac Isolated 8 Input Module 1794-5.55
1794-OA8I 120V ac Isolated Output Module 1794-5.56
1794-IA16 120V ac 16 Input Module 1794-5.60
1794-OA16 120V ac 16 Output Module 1794-5.61
1794-IM8 220V ac/dc 8 Input Module 1794-5.57
1794-OM8 220V ac/dc 8 Output Module 1794-5.58
1794-TB2
1794-TB3 2-wire Terminal Base 3-wire Terminal Base 1794-5.2
1794-TBN Terminal Base Unit 1794-5.16
1794-TBNF Fused Terminal Base Unit 1794-5.17
1794-TB3T Temperature Terminal Base Unit 1794-5.41
1794-TB3S Spring Clamp Terminal Base Unit 1794-5.42
1794-TB3TS Spring Clamp Temperature Base Unit 1794-5.43
1794-TB3G Terminal Base Unit 1794-5.51
1794-TB3GS Spring Clamp Terminal Base Unit 1794-5.59
1794-CE1, -CE3 Extender Cables 1794-5.12
1794-NM1 Mounting Kit 1794-2.13
1794-PS1 24V dc Power Supply 1794-5.35
This preface gave you information on how to use this manual
efficiently. The next chapter introduces you to the frequency
module.
Summary
Allen-Bradley HMIs

Using This ManualP–4
Publication 1794-6.5.16 – September 1998

Publication 1794-6.5.16 – September 1998
Chapter 1
What This Chapter Contains 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
How Y
ou Use the
Pulse Counter Module 1–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What
the Pulse Counter Module Does 1–3. . . . . . . . . . . . . . . . . . . . . .
Typical
Applications 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input
Capabilities 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Variables 1–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select
T ype of Measurement 1–4. . . . . . . . . . . . . . . . . . . . . . . .
Start
Period T ime Measurement 1–5. . . . . . . . . . . . . . . . . . . . . .
Check
if the Measurement is Complete 1–5. . . . . . . . . . . . . . . . .
Select Clock Frequency 1–5. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select
Number of Periods 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 1–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2
What This Chapter Contains 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Before Y
ou Install Y our Input Module 2–1. . . . . . . . . . . . . . . . . . . . . . .
European
Union Directive Compliance 2–1. . . . . . . . . . . . . . . . . . . . . .
EMC Directive 2–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Low V
oltage Directive 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Requirements 2–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring
the T erminal Base Units (1794-TB3G shown) 2–3. . . . . . . .
Installing
the Module 2–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting
the T erminal Base Unit on a DIN Rail 2–4. . . . . . . . . . . . .
Panel/Wall
Mounting 2–6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting
the Pulse Counter Module on the T erminal Base Unit 2–7. .
Connecting
Wiring for Y our Pulse Counter Module 2–9. . . . . . . . . . . . .
Wiring
to a 1794-TBN or -TBNF T erminal Base Unit 2–11. . . . . . . . . .
Wiring
connections for the 1794–IP4 Pulse Counter Module 2–12. . . .
Example
of 16–bit Period T ime Measurement and 16–bit Accumulating
Pulse Counter Wiring (4 channels) 2–13. . . . . . . . . . . . . . . . . . . .
Example
of 32–bit Period T ime Measurement Wiring (4 channels) 2–13
Module Indicators 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 2–14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3
What This Chapter Contains 3–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Enter Block Transfer Instructions 3–1. . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-2 Family Processor 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC-5 Family Processor 3–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SLC-5 Programming 3–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 3–8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Table of Contents
Overview of the Pulse
Counter Module
How to Install Your Pulse
Counter Module
Programming Your Pulse
Counter Module
Allen-Bradley HMIs

Table of Contentsii
Publication 1794-6.5.16 – September 1998
Chapter 4
What This Chapter Contains 4–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
ConfiguringY
our Pulse Counter Module 4–1. . . . . . . . . . . . . . . . . . . . .
Reading Data From Y
our Module 4–2. . . . . . . . . . . . . . . . . . . . . . . . .
Mapping
Data for the Module 4–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pulse
Counter Module (1794-IP4) Image T able Mapping 4–2. . . . . . .
Block
T ransfer Read W ord Assignments for the Pulse Counter Module
(1794-IP4) 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bit/Word
Definitions for Block T ransfer Read W ords for the
Pulse Counter Module 4–3. . . . . . . . . . . . . . . . . . . . . . . . . . .
Block
T ransfer W rite W ord Assignments for the Pulse
Counter Module 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bit/Word
Definitions for the Block T ransfer W rite W ords for the Pulse
Counter Module 4–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter Summary 4–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 5
What This Chapter Contains 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About DeviceNetManager Software 5–1. . . . . . . . . . . . . . . . . . . . . . . .
Polled I/O Structure 5–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adapter
Input Status W ord 5–2. . . . . . . . . . . . . . . . . . . . . . . . . . . .
System
Throughput 5–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mapping
Data into the Image T able 5–3. . . . . . . . . . . . . . . . . . . . . . . .
Pulse
Counter Module (1794-IP4) Image T able Mapping 5–3. . . . . . .
Block
T ransfer Read Word Assignments for the Pulse Counter
Module (1794-IP4) 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block
T ransfer W rite W ord Assignments for the Pulse
Counter Module 5–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Bit/Word
Definitions for the Pulse Counter Module 5–4. . . . . . . . .
Defaults 5–7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 6
Chapter Objectives 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
About
the ControlNet Adapter 6–1. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication Over the FLEX I/O Backplane 6–1. . . . . . . . . . . . . . . .
Scheduled
Data-T ransfer 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unscheduled
Data-T ransfer 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . .
Module
I/O Mapping 6–2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
I/O
Structure 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adapter
Input Status W ord 6–3. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safe
State Data 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Device Actions 6–4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communication
Fault Behavior 6–5. . . . . . . . . . . . . . . . . . . . . . . . .
Idle
State Behavior 6–5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input
Data Behavior upon Module Removal 6–5. . . . . . . . . . . . . . . .
Writing Configuration to and
Reading Status from Your
Module with a Remote I/O
Adapter
How Communication Takes
Place and I/O Image Table
Mapping with the DeviceNet
Adapter
Input, Output and
Configuration Files for
Analog Modules when used
with ControlNet

Table of Contents iii
Publication 1794-6.5.16 – September 1998
Pulse Counter Module (1794-IP4) Image T able Mapping 6–6. . . . . . .
Bit/Word
Definitions for Block T ransfer Read W ords for the
Pulse Counter Module 6–6. . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 7
What This Chapter Contains 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Status
Indicators 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
What’s Next 7–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 8
Specifications A–1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshoot the Pulse
Counter Module
Specifications
Allen-Bradley HMIs

Table of Contentsiv
Publication 1794-6.5.16 – September 1998

Chapter 1
Publication 1794-6.5.16 – September 1998


Read this chapter to familiarize yourself with the 1794–IP4 module.
For information on See page
How You Use the Pulse Counter Module . . 1–1
What the Pulse Counter Module Does . . . . 1–3
Input Capabilities . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–4
How the Pulse Counter Operates . . . . . . . . . . . . . . . . . . . . . NO TAG
The 1794–IP4 module is an intelligent I/O module designed to
perform high speed pulse counting. The module provides:
•4 pulse transmitter interfaces, each with 2 optocoupled inputs
Each input has + and – inputs for connection to transmitters with
complementary and noncomplementary signals.
The pulse inputs can accept frequencies up to 100KHz. The module
accepts and returns binary data.
The module’s primary use is accurate, high-speed counting of pulses
from flow meters or density meters. This includes quantity counting
and speed calculations.
The module has 2 16–bit up/down counters per channel. Each of the
4 interfaces can be individually configured for:
•period time measurement using one 16–bit counter and
accumulating pulse counting using the other 16–bit counter.
•period time measurement using a 32–bit counter.
An internal clock (1 or 10MHz) is used for period time
measurement.
The number of periods of the input signal to be measured is
selectable (1, 2, 4, 8, 16, 32, 64 and 128 periods).
The Pulse Counter has 4 identical pulse transmitter interfaces
(12–24V dc), each with 2 signal inputs (N and D). Each input has +
and – connections to the pulse transmitter.
What This Chapter
Contains
How You Use the
Pulse Counter Module
Allen-Bradley HMIs

1–2 Overview of the Pulse Counter Module
Publication 1794-6.5.16 – September 1998
+
+
Gavanically Isolated
dc/dc Converter
Internal +5V dc 12–24V dc
0V
Serial Bus
Bus Interface
Optocouplers
Logic
Logic
Logic
Logic
16–bit Counter
16–bit Counter
16–bit Counter
16–bit Counter
16–bit Counter
16–bit Counter
16–bit Counter
16–bit Counter
Control Word
ND
+
–
+
–
+
–
+
–
+
–
+
–
+
–
+
–
N
D
N
D
N
D
N
D
Configuration is selected by setting A (below) in the appropriate
position (variable SelectMeasureType). The arrows show signals
(control words and registers) controlled by the control system.
Gate Control
1–128 periods 16–bit Counter 16–bit Counter
1MHz
10MHz
Clock
&
A

1–3Overview of the Pulse Counter Module
Publication 1794-6.5.16 – September 1998
The Pulse Counter module performs high-speed scaling calculation
operations for various industrial applications. The module interfaces
with a FLEX I/O family adapter which then communicates with a
programmable controller processor that has block-transfer capability
and external I/O devices.
The adapter/power supply transfers data to the module (block
transfer write) and from the module (block transfer read) using BTW
and BTR instructions in your ladder diagram program. These
instructions let the adapter read input values and status from the
module, and let you write output values and configure the module’s
mode of operation. The following illustration describes the
communication process.
ADAPTER
ACTIVE FAULT LOCAL FAULT
24VDC
POWER SUPPLY
RIO ADAPTER
1794-ASB
Allen-Bradley
1
The adapter transfers your configuration data
to the module using a BTW.
Flexbus
External devices transmit
frequency signals to the mod-
ule.
2
The module converts
frequency signals into integer
format and stores these
values until the adapter
requests their transfer.
3
Your ladder program instructs the
adapter to perform a BTR of the
values and stores them in a data
table.
4
The adapter and module determine
that the transfer was made without
error and input values are within speci-
fied range.
5
Your ladder program can use and/or move the data (if valid)
before it is written over by the transfer of new data in a
subsequent transfer.
6
Your ladder program performs BTWs to the module when you
power it up, and any time you wish to reconfigure the module.
7
OK
4 CH Pulse Counter Module
1
1794–IP4
Allen-Bradley
What the Pulse Counter
Module Does
Allen-Bradley HMIs

1–4 Overview of the Pulse Counter Module
Publication 1794-6.5.16 – September 1998
You can use the 1794–IP4 module in the power management,
automotive, food and beverage, and oil and gas industries for various
flow and/or turbine metering applications. Some sample
applications include:
•quantity counting
•speed calulations
•brewery flow monitoring
•petrochemical flow and custody transfer
The Pulse Counter module has 4 identical input interfaces. Each of
the input channels may accept + and – input signals:
•N+ and N–
•D+ and D–
The pulse inputs can accept frequencies up to 100KHz. The module
accepts and returns binary data.
Each of the 4 counters has two 16–bit counter registers.
Variables
Communication between the Pulse Counter module and the control
system take place using variables accessible in the control system
program. Examples of variables are:
•selection of clock frequency (ClockFrequency)
•selection of measurement type (SelectMeasureType).
Control words are used to set parameters for configuration. Control
words sent to the Pulse Counter module are read back to the control
system to verify that at least 1 I/O scan has been performed since the
control system cycle which initiated the frequency module
command.
Select
T ype of Measurement
The module can be configured for 2 alternate functions using the
variable SelectMeasureType. Each of the 4 inputs can be individually
configured.
SelectMeasureType Function
0Period time measurement using a 16–bit counter register and the
function of a 16–bit accumulating counter
1Period time measurement using a 32–bit counter register
Typical Applications
Input Capabilities

1–5Overview of the Pulse Counter Module
Publication 1794-6.5.16 – September 1998
Start Period T ime Measurement
The control bit StartMeasurement starts the measurement of the time
period.
StartMeasurement Function
0Period time measurement stopped (not enabled)
1Period time measurement starts on the positive edge of the
variable
Check if the Measurement is Complete
After a complete measurement the flag MeasurementReady is set.
MeasurementReady Function
0The measurement is not complete
1The positive edge of the flag indicates that the measurement is
complete
MeasurementReady is reset by the module when a positive edge of
StartMeasurement is received.
Select
Clock Frequency
The clock period for the period time measurement resolution
selection can be set to 1 or 10MHz using the variable
ClockFrequency. 10MHz clock frequency is recommended at 32–bit
period time measurement to provide the best accuracy and
resolution. Use 1mHz clock frequency at 16–bit frequencies to avoid
overflow in the counter at frequencies over 15Hz.
ClockFrequency Function
0Clock frequency = 10MHz
1Clock frequency = 1MHz
Allen-Bradley HMIs

1–6 Overview of the Pulse Counter Module
Publication 1794-6.5.16 – September 1998
Select Number of Periods
The number of periods to be measured can be selected using the
variable NumberofPeriods.
NumberofPeriods Function
0Measure during 1 period
1Measure during 2 period
2Measure during 4 period
3Measure during 8 period
4Measure during 16 period
5Measure during 32 period
6Measure during 64 period
7Measure during 128 period
In this chapter, you learned about the Pulse Counter module, block
transfer communication, and details of how the module functions.
Now you can install the module.
Install the
IP4 Module

Chapter Summary

Chapter 2
Publication 1794-6.5.16 – September 1998


In this chapter, we tell you about:
For information on See page
Before You Install Your Module . . . . . . . . . . . . . . . . . . . . . . . 2–1
European Union Directives . . . . . . . . . . . . . . . . . . . . . . . . . . 2–1
Power Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–2
Installing the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4
on a DIN rail . . . . . . . . . . . . . . . . . . . 2–4
on a wall/panel 2–6
on the terminal base 2–7
Connecting Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–9
Module Indicators . . . . . . . . . . . . . . . . . . 2–14
Before installing your Pulse Counter module in the FLEX I/O
system:
You need to: As described under:
Calculate the power requirements of all
modules in each FLEX system. Power Requirements, page 2-2
Position the keyswitch on the terminal base Installing the Module, page 2–4
!ATTENTION: The Pulse Counter module does not
receive power from the backplane. +24V dc power
must be applied to your module before installation. If
power is not applied, the module position will appear
to the adapter as an empty slot in your chassis.
If this product has the CE mark it is approved for installation within
the European Union and EEA regions. It has been designed and
tested to meet the following directives.
EMC Directive
This product is tested to meet Council Directive 89/336/EEC
Electromagnetic Compatibility (EMC) and the following standards,
in whole or in part, documented in a technical construction file:
•EN 50081-2EMC – Generic Emission Standard, Part 2 –
Industrial Environment
•EN 50082-2EMC – Generic Immunity Standard, Part 2 –
Industrial Environment
This product is intended for use in an industrial environment.
What This Chapter
Contains
Before You Install Your
Input Module
European Union Directive
Compliance
Allen-Bradley HMIs

2–2 How to Install Your Pulse Counter Module
Publication 1794-6.5.16 – September 1998
Low Voltage Directive
This product is tested to meet Council Directive 73/23/EEC
Low Voltage, by applying the safety requirements of EN 61131–2
Programmable Controllers, Part 2 – Equipment Requirements and
Tests.
For specific information required by EN 61131-2, see the appropriate
sections in this publication, as well as the following Allen-Bradley
publications:
•Industrial Automation Wiring and Grounding Guidelines For
Noise Immunity, publication 1770-4.1
•Guidelines for Handling Lithium Batteries, publication AG-5.4
•Automation Systems Catalog, publication B111
This equipment is classified as open equipment and must be mounted
in an enclosure during operation to provide safety protection.
The wiring of the terminal base unit is determined by the current
draw through the terminal base. Make certain that the current draw
does not exceed 10A.
!ATTENTION: Total current draw through the
terminal base unit is limited to 10A. Separate power
connections may be necessary.
Power Requirements

2–3How to Install Your Pulse Counter Module
Publication 1794-6.5.16 – September 1998
Methods of wiring the terminal base units are shown in the
illustration below.
Wiring
the T erminal Base Units (1794-TB3G shown)
Wiring when total current draw is less than 10A
Wiring when total current draw is greater than 10A
Daisy-chaining
Individual
Total current draw through any base unit must not be greater than 10A
Combination
24V dc
24V dc
24V dc
24V dc
24V dc
24V dc
Note: Use this configuration if using any
“noisy” dc digital I/O modules in your system.
Pulse Counter Module wiring separate from digital wiring.
Note: All modules powered by the same power supply
must
be pulse, frequency or TC/R TD/mV modules for this configuration.
Note: All modules must be pulse, frequency or TC/RTD/mV modules for this configuration.
Pulse Counter
Module
Digital Input
Module
ATTENTION: Do not daisy chain power or
ground from the terminal base unit to any ac or dc
digital module terminal base unit.
!
Digital Output
Module
Digital Input
Module
Pulse Counter
Module
TC/RTD/mV
Module
Pulse Counter
Module
TC/RTD/mV
Module
Pulse Counter
Module
Pulse Counter
Module
Pulse Counter
Module
Pulse Counter
Module
Allen-Bradley HMIs

2–4 How to Install Your Pulse Counter Module
Publication 1794-6.5.16 – September 1998
Installation of the Pulse Counter module consists of:
•mounting the terminal base unit
•installing the module into the terminal base unit
•installing the connecting wiring to the terminal base unit
If you are installing your module into a terminal base unit that is
already installed, proceed to “Mounting the Pulse Counter Module
on the Terminal Base” on page 2–7.
Mounting the Terminal Base Unit on a DIN Rail
!ATTENTION: Do not remove or replace a terminal
base unit when power is applied. Interruption of the
flexbus can result in unintended operation or machine
motion.
1. Remove the cover plug (if used) in the male connector of the unit
to which you are connecting this terminal base unit.
2. Check to make sure that the 16 pins in the male connector on the
adjacent device are straight and in line so that the mating female
connector on this terminal base unit will mate correctly.
3. Position the terminal base on the 35 x 7.5mm DIN rail A(A-B pt.
no. 199-DR1; 46277-3). Proceed as follows:
Position terminal base at a slight angle and hooked over the top
of the DIN rail.
A
BA
C
4. Make certain that the female flexbus connector C is fully
retracted into the base unit.
Installing the Module