Siemens SIMATIC 505 Operating instructions

SIMA TIC 505
505–2556 Sixteen Channel Isolated
Thermocouple Input Module
Installation and Operation Guide
Order Number: PPX:505–8133–1
Manual Assembly Number: 2807059–0001
Original 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 1998 by Siemens Energy & 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 Energy & Automation, Inc. All rights, including rights created by patent grant or registration of a utility model or design, are
reserved.
Since Siemens Energy & 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 505–2556 Ther mocouple Input Module Installation and Operation Guide
Or der Manual Number: PPX:505–8133–1
Refer to this history in all correspondence and/or discussion about this manual.
Event Date Description
Original Issue 05/98 Original Issue (2807059–0001)

LIST OF EFFECTIVE P AGES
Pages Description Pages Description
Cover/Copyright Original
History/Effective Pages Original
iii — x Original
1-1 — 1-7 Original
2-1 — 2-13 Original
3-1 — 3-31 Original
A-1 — A-1 Original
B-1 — B-2 Original
C-1 — C-1 Original
D-1 — D-1 Original
Registration Original

Contents iii
Contents
Preface
Chapter 1 Description
1.1 Front Panel Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active LED 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Ter minals for Channels 1–16 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Operation and Configuration 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Asynchronous Operation 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Immediate I/O Compatibility 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J, K, R, S, T , E, or L Ther mocouples 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital W or d Map 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Thermocouple Input to Digital Conversion 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engineering Units 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scale Units 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Effect of Out-of-Range Input Signals 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resolution 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog-to-Digital Converter Filter 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Installation
2.1 Getting Started 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planning the Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calculating the I/O Base Power Budget 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unpacking the Module 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Configuring the Module 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Ther mocouple or Millivolt Measur ement via DIP Switch 2-4. . . . . . . . . . . . . . . . . .
Selecting Ther mocouple T ype Input via Har dwar e Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . .
Selecting PLC Login Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Data For mat 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Digital Filtering 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select Degr ees Celsius or Fahr enheit 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the Module Into the I/O Base 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring the Input Connectors 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Shield W iring 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Module Operation 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

iv Contents
Chapter 3Advanced Function Programming
3.1 Advanced Softwar e Functions 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 3-2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Overview of the Advanced Functions 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting the Module Configuration Jumper 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Logging the Module in the Contr oller I/O Configuration Memory 3-4. . . . . . . . . . . . . . . . . .
3.2 Internal Register Structur es 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Description of the I/O Registers 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Registers 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output Registers 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Control Registers 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inputs 3-8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Outputs 3-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Loading Data into the SIMA TIC 505–2556 Module 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.3 Loading Pr ograms into the I/O Module 3-15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.4 Timing Considerations 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Timing Constraints When Using Advanced Functions 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.5 Additional Infor mation about Each Function 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DefaultValues 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Degrees Centigrade or Degr ees Fahr enheit 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scaling 3-20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Alarm Setpoints 3-20. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital Filtering 3-21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Averaging 3-22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak and V alley Hold 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Peak and V alley Hold Reset 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flag Bits 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Advanced Function Pr ecedence 3-24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.6 Troubleshooting 3-25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting the System 3-25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.7 I/O Register Quick Refer ence 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.8 V or K Memory Configuration T ables 3-28. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.9 Addressing W orksheet 3-30. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.10 Items Unique to the SIMA TIC 505–2556 Module 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Appendix A Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Appendix C Jumper Settings Log Sheet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Appendix D Thermocouple Wire Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

Contents v
List of Figures
1-1 SIMATIC 505–2556 Fr ont Panel Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-2 Word Input to the PLC fr om the Module 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-3 Example Change in Input Level 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-4 Effect of V oltage Input on T ype J Ther mocouple 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-5 Effect of V oltage Input on T ype K Ther mocouple 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-6 Effect of V oltage Input on T ype R Ther mocouple 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-7 Effect of V oltage Input on Type S Ther mocouple 1-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-8 Effect of V oltage Input on T ype T Ther mocouple 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-9 Effect of V oltage Input on T ype E Ther mocouple 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-10 Effect of V oltage Input on T ype L Ther mocouple 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-11 Effect of V oltage Input on Millivolt Range 1-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1-12 Input Resolution 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-1 Factory Configuration Jumper Settings 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-2 Configuration Jumper Location 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-3 Input Connector W iring 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-4 Thermocouple W iring Application 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-5 Millivolt W iring Application 2-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-6 Cable Gr ounding 2-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2-7 Example Configuration Chart 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-1 Configuring the SIMA TIC 505–2556 Module for Advanced Featur es 3-3. . . . . . . . . . . . . . . . . . .
3-2 SIMATIC 505–2556 I/O Configuration Chart 3-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Input Flag Bits 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Discrete Handshake Inputs 3-9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Data T ransfer Contr ol Bits 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Data Loading Pr ocess 3-11. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7 Sample Low and High Alar m Setpoints 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-8 The Module_Ready Bit 3-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-9 Identifying the Data Being T ransferred 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-10 The Data_Ready Bit 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-11 Enabling the Functions Loaded 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-12 Loading the Enable Bits 3-14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-13 Startup Relay Ladder Logic 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-14 Peak/Valley T ruth T able 3-22. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-15 Peak/Valley Reset T ruth T able 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-16 Mapping Bit Position to Channel Number 3-23. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-17 I/O Register Quick Refer ence 3-27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-18 Open Ther mocouple Bits 3-31. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

vi Contents
A-1 Troubleshooting Matrix A-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
C-1 Factory Configuration Jumper Settings C-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
D-1 Thermocouple W ir e Guide D-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Contents vii
List of T ables
3-1 Input and Output Register Of fsets 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-2 Input Channel Data 3-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-3 Peak/Valley Hold Input W ords 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-4 Output Data Registers 3-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-5 Function Enable Bits 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-6 Data Identification Bits 3-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-7 Timing Over head for Functions Enabled 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-8 Default Function V alues 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-9 Default Function V alues for SIMA TIC 505–2556 3-19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3-10 Troubleshooting Flow Diagram 3-26. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
B-1 Physical and Envir onmental Specifications B-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Preface ix SIMATIC 505–2556 Installation and Operation Guide
Preface
This Installation and Operation Guide provides installation and operation
instructions for the SIMA TIC 505–2556 Sixteen Channel Isolated
Thermocouple Input Module for SIMA TIC 505 programmable controllers.
W e assume you are familiar with the operation of SIMA TIC 505
programmable controllers. Refer to the appropriate SIMA TIC user
documentation for specific information on the SIMA TIC 505 programmable
controllers and I/O modules.
This Installation and Operation Guide is organized as follows:
• Chapter 1 provides a description of the module.
• Chapter 2 covers installation and wiring.
• Chapter 3 is a guide to advanced function programming.
• Appendix A is a guide to troubleshooting
• Appendix B is a table of specifications.
• Appendix C is a log sheet for your configuration jumper settings.
• Appendix D is a Thermocouple W ire Guide
505–2556
Figur e 1 SIMA TIC 505–2556 16-Channel Isolated Ther mocouple Input Module

Preface
xSIMATIC 505–2556 Installation and Operation Guide
Additional manuals that have relevant information include the following:
•SIMA TIC 545/555/575 System Manual (PPX:505–8201–x).
•SIMA TIC 545/555/575 Programming Reference User Manual
(PPX:505–8204–x).
•SIMA TIC 505 TISOFT2 t User Manual (PPX:TS505–8101–x).
Refer to material in these manuals as necessary for additional information
about programming and operating your 545/555/575 system.
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 Energy
& Automation, Inc., for information about regulatory agency approvals that
have been obtained on Series 505 units.
Agency approvals are the following:
– UL-listed (industrial control equipment)
– CUL (Canadian UL)
– FM (Class I, Div . 2, Group A, B, C, D Hazardous Locations)
Generally , products listed in this manual comply with the essential
requirements of European Community EMC Directive, number 89/336/EEC,
and carry the CE label. See the declaration of conformity included with each
CPU for a listing of specific products and compliance details.
For additional technical assistance, call the Siemens T echnical Services
Group in Johnson City , T ennessee at 1-800-942-5697 or 423-461-2522, or
contact them by e-mail at [email protected] . For
technical assistance outside the United States, call 49-91
1-895-7000.
Related Manuals
Agency Standar ds
Agency Appr ovals
European
Community (CE)
Approval
Technical
Assistance

Description 1-1 SIMATIC 505–2556 Installation and Operation Guide
Chapter 1
Description
1.1 Front Panel Description 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Active LED 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Input Ter minals for Channels 1–16 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.2 Operation and Configuration 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Asynchronous Operation 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Immediate I/O Compatibility 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
J, K, R, S, T , E, or L Ther mocouples 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Digital W or d Map 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.3 Thermocouple Input to Digital Conversion 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Engineering Units 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Scale Units 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Effect of Out-of-Range Input Signals 1-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Resolution 1-7 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Analog-to-Digital Converter Filter 1-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Description
1-2 SIMATIC 505–2556 Installation and Operation Guide
1.1 Front Panel Description
The Sixteen Channel Thermocouple Input Module is a member of Siemens
Energy & Automation, Inc., family of I/O modules compatible with the
SIMA TIC 505 programmable controllers. The SIMA TIC 505–2556 is
designed to translate a J, K, R, S, T , E, and L (DIN J) thermocouple or
millivolt input signal into an equivalent digital word which is then sent to
the programmable controller (PLC).
The SIMA TIC 505–2556 Thermocouple Input Module features built–in
independent internal cold junction compensation and linearization for each
thermocouple input for T ypes J, K, E, R, S, L, and T . No external cold
junction compensation is required.
The Active LED is illuminated when the module is functioning normally . If
the Active LED is not lit, refer to Chapter 3 for troubleshooting.
The SIMA TIC 505–2556 uses a fixed wire press in connector to minimize
the effects of the connector mettalurgy on the accuracy of the measurement.
This connector provides wiring terminals for channels 1–16.
Figure 1-1 shows the front panel of the SIMA TIC 505–2556.
Active Led
Input T erminals
for Channels 1-16
Figure 1-1 SIMATIC 505–2556 Fr ont Panel Description
Active LED
Input T er minals for
Channels 1–16

Description 1-3 SIMATIC 505–2556 Installation and Operation Guide
1.2 Operation and Configuration
The module operates asynchronously with respect to the PLC; a scan of the
PLC and input sampling of the module do not occur at the same time.
Instead, the module will translate all inputs in one module update (24
milliseconds maximum) and store the translated words in a buffer memory .
The PLC retrieves the stored words from the module buffer memory at the
start of the I/O scan.
The SIMA TIC 505–2556 has been tested and is compatible with the
Immediate Read function of the SIMA TIC 545 and 555 PLC. The SIMA TIC
505–2556 is compatible with 545 and 555 PLCs. It is compatible with the
525 PLCs in 16WX mode only .
Each of the module’ s sixteen channels may be configured to receive either
J, K, R, S, T , E, or L thermocouple input signals or a DC voltage signal
ranging from –55 to +55 millivolts. Selection of thermocouple type or
millivolts are made via internal DIP switch settings and hardware jumpers
(see Sections 2.4.1 and 2.4.2).
Thermocouple and/or millivolt signals are translated into a 14–bit digital
word. Since the PLC requires a 16–bit input word, the 14–bit value from the
converter is placed into a 16–bit word for transmittal to the controller . As
shown in Figure 1-2, of the two bits not used for the digital word, one is
used to show the sign of the word, while the other is used to note values
which are ”overrange.”
Figure 1-2 Wor d Input to the PLC fr om the Module
Asynchronous
Operation
Immediate I/O
Compatibility
J, K, R, S, T , E, or L
Thermocouples
Digital W or d Map

Description
1-4 SIMATIC 505–2556 Installation and Operation Guide
1.3 Thermocouple Input to Digital Conversion
The following equations may be used to calculate the digital word in decimal
format which will result from a particular thermocouple input:
Thermocouple Mode, Digital W ord (WX) = Degrees X10
Millivolt Mode, Digital W ord (WX) = Millivolts X100
As an example, the following figure illustrates the effects of a change in
input level going from 0 _ to 102.4 _ F in the Thermocouple Input Mode.
Figure 1-3 Example Change in Input Level
When data format is selected as SCALE the full temperature range of the
thermocouple is scaled as an unsigned integer from 0–32000. The following
formula may be used to calculate the scaled integer value.
Scaled Integer = (measured temp – min temp) ÷ (max temp – min temp) x
32000
For example the scaled integer offset at 0 _ C for a T ype J thermocouple is:
Scaled integer = 0 – (–210) ÷(760 – (–210)) x 32000 = 6928
Thermocouple inputs exceeding the ANSI standard of 760 degrees C for
T ype J, or 1768 degrees C for T ype R and S, and 1000 degrees C for T ype E
will cause the overrange bit to be set and the maximum temperature for
that thermocouple type to be returned. Open thermocouples report
temperatures that are out of the allowable range. This condition may occur
due to failure of the thermocouple or due to the thermocouple wire being cut
or disconnected. The SIMATIC 505–2556 will report an open thermocouple
condition within 200 milliseconds.
NOTE: The SIMA TIC 505–2556 uses the least significant bit (16) to indicate
an open thermocouple. The value of this bit is set to 1 when this condition
occurs. An open thermocouple condition will report within 200 milliseconds.
Engineering Units
Scale Units
Ef fect of
Out-of-Range Input
Signals

Description 1-5 SIMATIC 505–2556 Installation and Operation Guide
Figure 1-4 Effect of V oltage Input on T ype J Ther mocouple
Figure 1-5 Ef fect of V oltage Input on T ype K Ther mocouple
Figure 1-6 Ef fect of V oltage Input on T ype R Ther mocouple
Figure 1-7 Ef fect of V oltage Input on Type S Ther mocouple

Description
1-6 SIMATIC 505–2556 Installation and Operation Guide
Figure 1-8 Effect of V oltage Input on T ype T Ther mocouple
Figure 1-9 Ef fect of V oltage Input on Type E Ther mocouple
Figure 1-10 Ef fect of V oltage Input on T ype L Ther mocouple
Figure 1-11 Ef fect of V oltage Input on Millivolt Range

Description 1-7 SIMATIC 505–2556 Installation and Operation Guide
The module has a resolution of approximately 0.1 _ C, 0.2 _ F or exactly 0.01
millivolts.
Figure 1-12 shows the corresponding input resolution per step for each of
the input configuration modes:
Figure 1-12 Input Resolution
The SIMATIC 505–2556 features a configurable notch filter on the
analog–to–digital converters. This filter is very effective at removing
power–line frequency input noise from the analog–to–digital conversion
process. The filter frequency is configurable at jumper locatio CN10 on the
printed circuit board. W ith no jumper at CN10, the filter frequency is 60 Hz.
By placing the 3–pin jumper (included in an envelope packed with the
SIMA TIC 505–2556) at location CN10, the filter frequency is changed to
50 Hz.
Resolution
Analog-to-Digital
Converter
Filter

Installation 2-1 SIMATIC 505–2556 Installation and Operation Guide
Chapter 2
Installation
2.1 Getting Started 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Planning the Installation 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Calculating the I/O Base Power Budget 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unpacking the Module 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2.2 Configuring the Module 2-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Ther mocouple or Millivolt Measur ement via DIP Switch 2-4. . . . . . . . . . . . . . . . . .
Selecting Ther mocouple T ype Input via Har dwar e Jumpers 2-4. . . . . . . . . . . . . . . . . . . . . . .
Selecting PLC Login Mode 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Data For mat 2-4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Selecting Digital Filtering 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Select Degr ees Celsius or Fahr enheit 2-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Inserting the Module Into the I/O Base 2-7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Wiring the Input Connectors 2-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Connecting the Shield W iring 2-10. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checking Module Operation 2-12. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Installlation
2-2 SIMATIC 505–2556 Installation and Operation Guide
2.1 Getting Started
The installation of the SIMA TIC 505–2556 Sixteen Channel Thermocouple
Input Module involves the following steps:
1. Planning the installation
2. Configuring the module
3. Inserting the module into the I/O base
4. W iring the module input connector
5. Checking module operation
The steps listed above are explained in detail in the following pages.
Planning is the first step in the installation of the module. This involves
calculating the I/O base power budget and routing the input signal wiring to
minimize noise. The following sections discuss these important
considerations.
The SIMA TIC 505–2556 requires 5 watts of +5 VDC power from the I/O
base. Use these values to verify that the base power supply capacity is not
exceeded.
Open the shipping carton and remove the special anti–static bag which
contains the module.
!CAUTION
The components on the SIMA TIC 505–2556 module printed circuit card can be
damaged by static electricity discharge. T o prevent this damage, the module is
shipped in a special anti-static bag.
Static control precautions should be followed when removing the module from
the bag, when opening the module, and when handling the printed circuit card
during configuration.
After discharging any static build–up, remove the module from the static
bag. Do not discard the static bag. You will need it for the following
configuration procedure.
Planning the
Installation
Calculating the I/O
Base Power Budget
Unpacking the
Module