Siemens SIMATIC 505 User manual

SIMA TIC 505
Isolated Interrupt
Discrete Input Modules
User Manual
Order Number: PPX:505–8123–2
Manual Assembly Number: 2586546–0085
Second Edition

!DANGER
DANGER indicates an imminently hazardous situation that, if not avoided, will
result in death or serious injury
.
DANGER is limited to the most extreme situations.
!WARNING
W ARNING indicates a potentially hazardous situation that, if not avoided, could
result in death or serious injury, and/or property damage.
!CAUTION
CAUTION indicates a potentially hazardous situation that, if not avoided, could
result in minor or moderate injury, and/or damage to property
.
CAUTION is also used for property-damage-only accidents.
Copyright 1995 by Siemens Industrial Automation, Inc.
All Rights Reserved — Printed in USA
Reproduction, transmission, or use of this document or contents is not permitted without express consent of
Siemens Industrial Automation, Inc. All rights, including rights created by patent grant or registration of a utility model or design, are
reserved.
Since Siemens Industrial Automation, Inc., does not possess full access to data concerning all of the uses and applications of
customer’ s products, we do not assume responsibility either for customer product design or for any infringements of patents or rights
of others which may result from our assistance.

MANUAL PUBLICA TION HISTOR Y
SIMATIC 505 Isolated Interrupt Discr ete Input Modules User Manual
Or der Manual Number: PPX:505-8123-2
Refer to this history in all correspondence and/or discussion about this manual.
Event Date Description
Original Issue 03/93 Original Issue (2801386–0001)
Second Edition 04/95 Second Edition (2801386–0002)

LIST OF EFFECTIVE P AGES
Pages Description Pages Description
Cover/Copyright Second Edition
History/Ef fective Pages Second Edition
iii — vii Second Edition
1-1 — 1-3 Second Edition
2-1 — 2-14 Second Edition
3-1 — 3-5 Second Edition
A-1 — A-4 Second Edition
Registration Second Edition

Contents iii
Contents
Preface
Chapter 1 Product Overview
1.1 Description of Basic Featur es 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Featur es 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compatibility with SIMA TIC CPUs 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Sour ces 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional T ime Constant Filter 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Featur es 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Contents 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Installing the Module
2.1 Overview of Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flow of T asks 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling the Module 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visual Inspection 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Configuring the Module Operating Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Interrupt T ype 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting 10-ms T ime-Constant Filter 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Inserting the Module into the Base 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the Module 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Field W iring 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Guidelines 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Avoiding Noise 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sequence of Inputs 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring the T er minal Block 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the T er minal Block 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Configuring I/O Memory in the CPU 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3 Operating the Module
3.1 Operational Description 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Module in Non-Interrupt Mode 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Using the Module in Interrupt Mode 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Writing an Interrupt RLL Pr ogram 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Outline of Interrupt Pr ocessing 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Module Status and T roubleshooting 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LED Array 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting 3-5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv Contents
Appendix A Specifications
A.1 Specifications A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
A.2 Terminal Block W orksheet A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents v
List of Figures
Figur e 1-1 DC Interrupt Input Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-1 Flowchart of Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-2 Location of Interrupt Dipswitch Gr oup 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-3 S1 Dipswitch Settings 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-4 S2 Dipswitch Settings 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-5 Example Interrupt T ype Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-6 Inserting the Module into the Base 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-7 I/O Terminals 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-8 Field Input W iring Examples 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-9 Installing the T er minal Block 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-10 Terminal Blocks 2-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 2-11 Sample I/O Module Definition Chart 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e 3-1 Interrupt Input Module Faceplate and LED Display 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Figur e A-1 Input Ter minal W orksheet A-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi Contents
List of T ables
T able 3-1 Logical Points Corr esponding to Interrupt Inputs 9 – 16 3-2. . . . . . . . . . . . . . . . . . . . . . . . .
T able 3-2 Troubleshooting Chart 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T able A-1 Environmental Specifications A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T able A-2 Physical Specifications A-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
T able A-3 Electrical/Performance Specifications A-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface vii SIMATIC 505 Interrupt Input Module User Manual
Preface
This manual provides the information needed to install, wire, and configure
the following SIMA TIC 505 Isolated Interrupt Discrete Input Modules:
PPX:505–4317 24 VDC
PPX:505–4318 48 VDC
PPX:505–4319 125 VDC
Except for their input voltage differences, these modules function
identically.
Refer to the manuals listed below for instructions on installing,
programming, and troubleshooting your controller and I/O. The x in the
order number refers to the latest edition.
•SIMA TIC 505 Programming Reference Manual (PPX:505–8104–x)
•SIMATIC525/535 Hardware/Installation Manual
(PPX:505–8103–x)
•SIMATIC 545 System Manual (PPX:545–8101–x)
•SIMATIC 555 System Manual (PPX:555–8101–x)
•SIMATIC560T/565T System Manual (PPX:560/565–8109–x)
•SIMATIC 545/555 System Manual (PPX:545/555–8101–x)
•The user manual for your release of TISOFT 
The Interrupt Input Modules meet the standards of the following agencies:
• Underwriters Laboratories  : UL Listed (Industrial Control Equipment)
• Canadian Standards Association: CSA Certified (Process Control
Equipment)
• Factory Mutual Approved; Class I, Div . 2 Hazardous Locations
•V erband Deutscher Elektrotechniker (VDE) 0160 Clearance/Creepage
for Electrical Equipment (Self-Compliance)
Series 505 products have been developed with consideration of the draft
standard of the International Electrotechnical Commission Committee
proposed standard (IEC-65A/WG6) for programmable controllers (released
as IEC 1 131–2, Programmable Controllers Part 2: Equipment Requirements
and T ests, First Edition, 1992–09). Contact Siemens Industrial Automation,
Inc., for a listing of the standards to which Series 505 complies.
For technical assistance, contact your Siemens Industrial Automation, Inc.
distributor or sales office. If you need assistance in contacting your U.S.
distributor or sales office, call 1–800–964–41 14.
Other Manuals
Agency Appr ovals
T
elephoning for
Assistance

Product Overview 1-1 SIMATIC 505 Interrupt Input Module User Manual
Chapter 1
Product Overview
1.1 Description of Basic Featur es 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Featur es 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Compatibility with SIMA TIC CPUs 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Sour ces 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating Modes 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Optional T ime Constant Filter 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Physical Featur es 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Contents 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Product Overview
1-2 SIMATIC 505 Interrupt Input Module User Manual
1.1 Description of Basic Features
The SIMA TIC 505 Isolated Interrupt Input Modules have 16 discrete input
circuits and operate on different voltages depending on the module. The
PPX:505–4317 operates on 24 VDC, the PPX:505–4318 on 48 VDC, and the
PPX:505–4319 on 125 VDC. Up to 8 of the 16 points can be configured as
interrupt points. Isolation is provided between each point. The modules
operate identically except for differences in input voltage.
The Interrupt Input Modules are compatible with all Series 505  bases.
The Interrupt Input Modules are compatible with all SIMA TIC 505 CPUs
when used in the non-interrupt mode.
When interrupt mode is selected for any of the configurable inputs, the
module is compatible with the SIMA TIC 545 and 555 CPUs with Firmware
Release 2.1 (or greater). Consult the release notes or other associated
documentation to determine if interrupt mode is supported by a particular
CPU.
The Interrupt Input Modules sense incoming DC signals from field devices
and operate on power supplied by the I/O base backplane. Refer to your
system manual for instructions on supplying power to the system I/O base.
The Interrupt Input Module can be used in one of the following two modes.
• 16 isolated discrete inputs, all non-interrupt mode:
When this module is used in non-interrupt mode, it functions as a
standard 16-point discrete input module and can be installed in any
base (local or remote) of a Series 505 programmable controller system.
• Configurable mix of interrupt inputs and non-interrupt inputs:
When this module is used in interrupt mode, it functions as a 32-point
I/O module (16 physical inputs and 16 internal points) and can only be
installed in the local base of the system. Local Base is defined as the
I/O base containing the CPU.
Interrupt input mode triggers an immediate response to a field device
condition without having to wait for the CPU to complete its program scan
cycle.
Y ou can configure the module to detect transitions from on to off, off to on,
or either edge when you select interrupt type for a pair of input points.
An eight-position dipswitch allows you to enable a 10-ms filter on any of the
16 physical input points in groups of two.
Module Featur
es
Compatibility with
SIMA TIC CPUs
Power Sour ces
Operating Modes
Optional T ime
Constant Filter

Product Overview 1-3 SIMATIC 505 Interrupt Input Module User Manual
The Interrupt Input Modules have two groups of dipswitches located at the
top of the board, as shown in Figure 1-1. The module includes a standard
input terminal connector which can be detached from the module without
having to remove the module from the base. An LED array on the faceplate
shows input status for each point and also interrupt enable mode.
Chapter 2 describes how to configure the dipswitches, wire the terminal
block, and install the module.
Chapter 3 describes the basic operating features and the use of the LED
array for reading the status of the inputs.
Switch S1
Interrupt T ype
Dipswitches
Switch S2
10-ms Filter
Dipswitches
Input
Terminal
Block
Backplane
Connector
Input Status
LED Array
Chart showing
dipswitch settings
Figure 1-1 DC Interrupt Input Module
Physical Featur es
Manual Contents

Installing the Module 2-1
SIMATIC 505 Interrupt Input Module User Manual
Chapter 2
Installing the Module
2.1 Overview of Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flow of T asks 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Handling the Module 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Visual Inspection 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Configuring the Module Operating Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Interrupt T ype 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting 10-ms T ime-Constant Filter 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Example Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.3 Inserting the Module into the Base 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the Module 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.4 Field W iring 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring Guidelines 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Avoiding Noise 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Sequence of Inputs 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring the T er minal Block 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the T er minal Block 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.5 Configuring I/O Memory in the CPU 2-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installing the Module
2-2 SIMATIC 505 Interrupt Input Module User Manual
2.1 Overview of Installation
Figure 2-1 shows the organization of the tasks described in this chapter .
Insert module into base
Power up
Set I/O configuration with TISOFT programming device
W rite I/O configuration to controller memory
Configure operating mode dipswitches
Wire and connect input terminal block
Figure 2-1 Flowchart of Installation
Flow of T asks

Installing the Module 2-3
SIMATIC 505 Interrupt Input Module User Manual
Many integrated circuit (IC) devices are susceptible to damage by the
discharge of static electricity . Follow the suggestions listed below to reduce
the probability of damage to these devices when you are handling a CPU, a
base controller , or any of the I/O modules.
Both the module and the person handling the module should be at the same
ground potential. T o accomplish this, fulfill the following conditions.
•T ransport the module in an anti-static container or antistatic material.
• Ensure that the work area has a conductive pad with a lead connecting
it to a common ground.
• Ground yourself by making contact with the conductive pad and/or by
wearing a grounded wrist strap.
If there is any visible damage to the module, contact your Siemens
Industrial Automation, Inc. distributor or sales office for replacement.
Handling the
Module
V
isual Inspection

Installing the Module
2-4 SIMATIC 505 Interrupt Input Module User Manual
2.2 Configuring the Module Operating Mode
Two groups of dipswitches are located on the top edge of the module facing
upward, as shown in Figure 2-2. The set of switches closest to the backplane
connector , labeled S1, is the group used to select interrupt type for points 9
through 16.
Backplane
Connector
Chart showing
dipswitch settings
Switch S1
Interrupt T ype
Dipswitches
Switch S2
10-ms Filter
Dipswitches
Figure 2-2 Location of Interrupt Dipswitch Gr oup
The interrupt type is selected for pairs of input points and cannot be
selected individually . Each pair of dipswitches in the S1 group selects the
interrupt mode for a pair of input points, as listed below .
Switches 1 and 2 control points 9 and 10
Switches 3 and 4 control points 1 1 and 12
Switches 5 and 6 control points 13 and 14
Switches 7 and 8 control points 15 and 16
Y ou configure each pair of points to detect on-to-off, off-to-on, or either -edge
transitions according to the way you set each pair of dipswitches.
NOTE: This section discusses how to set the dipswitches to select interrupt
types for the configurable input points. T o operate as interrupt inputs, these
points must also be enabled individually in the user program using the
internal logic outputs assigned to this task. Refer to Chapter 3 for more
information.
Selecting Interrupt
Type

Installing the Module 2-5
SIMATIC 505 Interrupt Input Module User Manual
Figure 2-3 shows how to set the dipswitches in S1 to select the interrupt
type for each pair of input points.
12345678
Switch S1
A B ABABAB
Interrupt T ype Switches
AB
Off Off
No Interrupt
On-to-of f edge
Of f-to-on edge
Either edge
On
Off
Off
On
On On
Interrupt T ype
Select Interrupt Type for each pair of
points according to the chart below .
9/10 11/12 13/14 15/16
Each pair of switches selects interrupt type
for a pair of input points, as shown here.
Input
Points
OFF
ON
y
b
Figure 2-3 S1 Dipswitch Settings
The second set of dipswitches, located closest to the faceplate of the module
and labeled S2, is used to select input filter time constants of 10 ms per pair
of points, as shown in Figure 2-4. You can filter any of the 16 input points,
both non-interrupting and interrupting. The 10-ms filter may be useful in
applications where relay chatter or switch bounce is a potential problem.
NOTE: Filtering delays module response time to input transitions. For
interrupt applications with critical response time requirements, be careful
to take into account the time delay before you decide to use these filters.
12345678
Switch S2
10-ms Filter Switches
Input Points:
Each switch activates the filter for a
pair of input points, as shown here.
Of f = no filter
On = 10-ms filter
9/10 11/12 13/14 15/161/2 3/4 5/6 7/8
OFF
ON
y
b
Figure 2-4 S2 Dipswitch Settings
Selecting 10-ms
Time-Constant
Filter

Installing the Module
2-6 SIMATIC 505 Interrupt Input Module User Manual
Configuring the Module Operating Mode (continued)
Figure 2-5 shows an example of a configuration that enables interrupt mode
and the dipswitch setting used for the given configuration.
• Points 9 and 10 are configured to be non-interrupting.
• Points 1 1 and 12 are configured to generate an interrupt upon an
on-to-off transition.
• Points 13 and 14 are configured to generate an interrupt upon an
off-to-on transition.
• Points 15 and 16 are configured to generate an interrupt upon either
transition.
No Interrupt
On-to-Of f edge Of f-to-On edge
Either edge
Switch S1
12345678
OFF
ON
y
b
A BABABAB
9/10 11/12 13/14 15/16 Input Points:
Figure 2-5 Example Interrupt T ype Settings
NOTE: T o operate as interrupt inputs, these points must also be enabled
individually in the user program using the internal logic outputs assigned to
this task. Refer to Chapter 3 for more information.
Example Settings

Installing the Module 2-7
SIMATIC 505 Interrupt Input Module User Manual
2.3 Inserting the Module into the Base
!WARNING
Failure to follow appropriate safety precautions could result in death or serious
injury and/or damage to equipment.
T o minimize risk of potential shock hazard, turn off power to the I/O base and to
any modules installed in the base before inserting or removing a module or
installing a terminal block.
The power must be turned off to the I/O base and to any modules installed in
the base before inserting or removing a module or installing a terminal block.
The Interrupt Input Modules are single-wide and may be installed in any
available slot for single-wide modules. Do not touch the printed circuit
board (PCB) while inserting the module. This could cause electrostatic
damage to its components. To insert the module, follow these steps.
1. Position the module so that the front bezel is facing you.
2. Hold the top and bottom of the bezel and slide the module carefully into
the slot, pushing it all the way into the base. If you have inserted the
module correctly , you will feel a slight increase in resistance as the
module mates with the backplane connector . (See Figure 2-6).
3. Use a flat-head screwdriver to tighten the screws at the top and bottom
of the bezel. This grounds the module to the base. Do not overtighten.
Backplane
connectors
0.3 N–m (2.61 in.-lbs.) minimum torque
0.6 N–m (5.22 in.-lbs.) maximum torque
C
P
U
P
S
Earth
Ground
Figure 2-6 Inserting the Module into the Base
Inserting the
Module

Installing the Module
2-8 SIMATIC 505 Interrupt Input Module User Manual
2.4 Field Wiring
These modules do not require user-supplied power. A module consumes a
maximum of 2.0 W of +5 V power from the base backplane.
The modules have been designed to work with up to 1000 feet (303 meters)
of wire to the switch. The size of the wire used must be adequate for switch
current. T o prevent noise on the signal wiring, keep signal and power wiring
separate. For input or output signals and class 2 power supply wires, use
shielded, twisted-pair cable (12–26 A WG or 0.16–3.2 mm
2
, either stranded
or solid-type).
!WARNING
Use supply wires suitable for at least 75 ° C. Signal wiring connected to this
module must be rated at least 300 V .
W iring that does not meet the requirements could cause death and/or serious
injury or damage to equipment.
Ensure that your wire is suitable for at least 75
° C, and that signal wiring con -
nected to this module is rated at least 300 V .
To minimize unwanted noise, follow these wiring installation guidelines.
• Use the shortest possible wires.
• Separate discrete and analog wires.
•A void placing signal wires parallel to high-energy wires. If the two
must meet, cross them at right angles.
•A void bending the wire into sharp angles.
• Use wireways for wire routing.
• When using shielded wires, ground them only at the source end for
better noise immunity .
• Place wires so that they do not interfere with existing wiring.
• Label the wires.
NOTE: Terminate shielding for the output cable at the same earth ground as
the user power supply . T erminate shielding for the input signal wire at the
same earth ground as the transmitter .
W iring Guidelines
A voiding Noise