Pilz PSSu K S RS232 Modbus ASCII User manual

PSSu E S RS232(-T)
Operating Manual 1001378-EN-04
}Decentralised system PSSuniversal I/O

Preface
This document is a translation of the original document.
All rights to this documentation are reserved by Pilz GmbH & Co. KG. Copies may be made
for internal purposes. Suggestions and comments for improving this documentation will be
gratefully received.
Source code from third-party manufacturers or open source software has been used for
some components. The relevant licence information is available on the Internet on the Pilz
homepage.
Pilz®, PIT®, PMI®, PNOZ®, Primo®, PSEN®, PSS®, PVIS®, SafetyBUS p®,
SafetyEYE®, SafetyNET p®, the spirit of safety® are registered and protected trademarks
of Pilz GmbH & Co. KG in some countries.
SD means Secure Digital

Contents
Operating Manual PSSu E S RS232(-T)
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Section 1 Introduction 5
1.1 Validity of documentation 5
1.1.1 Retaining the documentation 5
1.1.2 Terminology: System environment A and B 5
1.2 Definition of symbols 6
Section 2 Overview 7
2.1 Module structure 7
2.2 Module features 7
2.3 Front view 8
Section 3 Safety 10
3.1 Intended use 10
3.2 Safety regulations 11
3.2.1 Use of qualified personnel 11
3.2.2 Warranty and liability 11
3.2.3 Disposal 11
Section 4 Function description 12
4.1 Block diagram 12
4.2 Module features 12
4.2.1 Functions 12
4.2.2 Integrated protection mechanisms 13
4.3 Data exchange 13
4.4 Configuration 14
4.4.1 Interface parameters 14
4.4.2 Receive buffer threshold 14
Section 5 Installation 15
5.1 General installation guidelines 15
5.1.1 Dimensions 15
5.2 Installing the base module 17
5.3 Inserting and removing an electronic module 18
5.3.1 Inserting an electronic module 18
5.3.2 Removing an electronic module 19
5.3.3 Changing an electronic module during operation 19
Section 6 Wiring 20
6.1 General wiring guidelines 20
6.1.1 Mechanical connection of the base modules 20
6.2 Terminal configuration 22
6.3 Connecting the module 25
Section 7 Operation 26
7.1 Messages 26
7.2 Display elements 26
7.2.1 Display element for operational readiness 26

Contents
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7.2.2 Display element for module error 27
7.2.3 Display elements for data transmission 27
Section 8 Technical details 28
Section 9 Order reference 31
9.1 Product 31
9.2 Accessories 31

Introduction
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1 Introduction
1.1 Validity of documentation
This documentation is valid for the products PSSu E S RS232 and PSSu E S RS232-T. It is
valid until new documentation is published.
This operating manual explains the function and operation, describes the installation and
provides guidelines on how to connect the product.
The module PSSu E S RS232-T is suitable for use where there are increased environ-
mental requirements (see Technical Details).
1.1.1 Retaining the documentation
This documentation is intended for instruction and should be retained for future reference.
1.1.2 Terminology: System environment A and B
The PSSu system can be used in two different system environments. The module's applic-
ation area is described in the chapter "Intended Use" of the manual.
The distinction is made between
}PSSu in system environment A
}PSSu in system environment B
The distinction is based on the application area of the PSSu system.
PSSu in system environment A may be used in the
}Decentralised system PSSu I/O
}Not in the automation system PSS 4000
PSSu in system environment B may be used in the
}Automation system PSS 4000, e.g. with
– Decentralised system PSSu I/O with SafetyNET p
– Control system PSSu PLC
– Control system PSSu multi

Introduction
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1.2 Definition of symbols
Information that is particularly important is identified as follows:
DANGER!
This warning must be heeded! It warns of a hazardous situation that poses
an immediate threat of serious injury and death and indicates preventive
measures that can be taken.
WARNING!
This warning must be heeded! It warns of a hazardous situation that could
lead to serious injury and death and indicates preventive measures that can
be taken.
CAUTION!
This refers to a hazard that can lead to a less serious or minor injury plus
material damage, and also provides information on preventive measures
that can be taken.
NOTICE
This describes a situation in which the product or devices could be dam-
aged and also provides information on preventive measures that can be
taken. It also highlights areas within the text that are of particular import-
ance.
INFORMATION
This gives advice on applications and provides information on special fea-
tures.

Overview
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2 Overview
2.1 Module structure
A module consists of
}Electronic module and
}Base module with
– Screw terminals or
– Cage clamp terminals
The base modules are the carrier units for the electronic modules and are used to connect
the field wiring. The electronic modules are inserted on to the base modules and determine
the module's function.
Details of the base modules that can be used are available in the chapter entitled “Intended
Use”.
2.2 Module features
The product has the following features:
}Serial interface: RS 232
}Communication channels: 2 (Tx/Rx, full duplex)
}Configurable transmission rates
}Receive buffer: 1023 Byte
}Send buffer: 127 Byte
}Max. number per system: 6
}LEDs for:
– Operational readiness
– Module error
– Data transmission
}For standard applications in system environment A and B
}T-type:
PSSu E S RS232-T: for increased environmental requirements

Overview
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2.3 Front view
2111
2212
2313
2414
9
8
7
5
6
10
11
A
B
1
3
4
2
Legend:
}A: Electronic module
}B: Base module
}1: LED for module diagnostics
}2: Labelling strip with:
– Name of electronic module
– Order number
– Serial number
– Hardware version number
– 2D code
}3: Labelling strip for the terminal configuration on the base module
}4: Name of electronic module
}5: Connection level 1
}6: Connection level 2
}7: Connection level 3
}8: Connection level 4

Overview
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}9: Square mounting holes (connection levels 1, 2, 3 and 4)
– With screw to loosen/tighten the screw terminal on base modules with screw termin-
als
– With mechanism to operate the cage clamp on base modules with cage clamp ter-
minals
}10: Round connection holes (connection levels 1, 2, 3 and 4) for connecting the signal
lines
}11: Mounting slot for colour marker to label the connection level (connection levels 1, 2,
3 and 4)

Safety
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3 Safety
3.1 Intended use
The module may be used for standard applications in system environment A and B.
The module provides a serial interface, which is intended for communication in non-safety-
related applications.
The module PSSu E S RS232-T is suitable for use where there are increased environ-
mental requirements (see Technical Details).
Intended use includes making the electrical installation EMC-compliant. Please refer to the
guidelines stated in the "PSSuniversal Installation Manual". The module is designed for use
in an industrial environment. It is not suitable for use in a domestic environment, as this can
lead to interference.
The following is deemed improper use in particular:
}Any component, technical or electrical modification to the module
}Use of the module outside the areas described in this manual
}Any use of the module that is not in accordance with the technical details.
INFORMATION
The module is supported by
}PSSuniversal Configurator and PSSuniversal Assistant from Version
1.8.1
}PAS4000 from Version 1.1.1
– We recommend that you always use the latest version (download
from www.pilz.de).
The PSSu E S RS232 module may be used in conjunction with the following base modules:
}PSSu BP 1/8 S
}PSSu BP 1/8 C
}PSSu BP 1/12 S
}PSSu BP 1/12 C
}PSSu BP-C 1/8 S
}PSSu BP-C 1/8 C
}PSSu BP-C 1/12 S
}PSSu BP-C 1/12 C
The module PSSu E S RS232-T may be used in conjunction with the following base mod-
ules:
}PSSu BP 1/8 S-T
}PSSu BP 1/8 C-T
}PSSu BP 1/12 S-T
}PSSu BP 1/12 C-T
}PSSu BP-C 1/8 S-T

Safety
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}PSSu BP-C 1/8 C-T
}PSSu BP-C 1/12 S-T
}PSSu BP-C 1/12 C-T
3.2 Safety regulations
3.2.1 Use of qualified personnel
The products may only be assembled, installed, programmed, commissioned, operated,
maintained and decommissioned by competent persons.
A competent person is someone who, because of their training, experience and current pro-
fessional activity, has the specialist knowledge required to test, assess and operate the
work equipment, devices, systems, plant and machinery in accordance with the general
standards and guidelines for safety technology.
It is the company’s responsibility only to employ personnel who:
}Are familiar with the basic regulations concerning health and safety / accident preven-
tion
}Have read and understood the information provided in this description under "Safety"
}And have a good knowledge of the generic and specialist standards applicable to the
specific application.
3.2.2 Warranty and liability
All claims to warranty and liability will be rendered invalid if
}The product was used contrary to the purpose for which it is intended
}Damage can be attributed to not having followed the guidelines in the manual
}Operating personnel are not suitably qualified
}Any type of modification has been made (e.g. exchanging components on the PCB
boards, soldering work etc.).
3.2.3 Disposal
}In safety-related applications, please comply with the mission time TM in the safety-re-
lated characteristic data.
}When decommissioning, please comply with local regulations regarding the disposal of
electronic devices (e.g. Electrical and Electronic Equipment Act).

Function description
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4 Function description
4.1 Block diagram
Module Bus
Periphery
Supply
+ 24 V DC
Module
Supply
+ 5 V DC
Data
(ST)
RS232
13 23
(C-Rail)
11 12 21 22 14 24
4.2 Module features
4.2.1 Functions
The module enables communication via a serial interface.
Module supply
}The module supply provides the module with voltage.
Periphery supply
}The periphery supply provides the serial interface with voltage.
Signal processing
}In each cycle, a max. of 8 Bytes of data can be transferred in both directions between
control system and module. The data to be transferred is stored temporarily in a send
and receive buffer.
}Two additional status bytes and control bytes are available in the process image for
data exchange between control system and module.
}All the configuration data is stored in the head module and is assigned to the module on
restart. This way the configuration data is retained even if you change the module.

Function description
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Schematic representation of signal processing with decentralised system PSSu I/O:
Ext. device
with serial
interface
RS232
Control
system
Electronic module
PSSu E S RS232(-T)
Head
module
Bus system/
Network
Module
bus
PSSu I/O
Schematic representation of signal processing with the PSSu PLC/PSSu multi control sys-
tem:
Ext. device
with serial
interface
RS232
Electronic module
PSSu E S RS232(-T)
Head
module
with
control
system
Module
bus
4.2.2 Integrated protection mechanisms
When the PSSuEFPS1(-T) or PSSu E F PS2(-T)(-R) is used to supply the system, the
module supply is buffered for 20ms if the supply voltage is interrupted.
The module detects the following errors:
}Start-up error
}Configuration error
}ST communication error
}Bus termination error
4.3 Data exchange
Data is exchanged between subscribers via a special protocol based on the Modbus ASCII
protocol.
INFORMATION
The necessary function block is available from Technical Support (tele-
phone: [phone]).

Function description
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4.4 Configuration
The module has the following configuration options:
}Interface parameter
}Threshold receive buffer
4.4.1 Interface parameters
The following interface parameters can be configured:
}Transmission rate
}Block size (data bits and parity)
}Number of stop bits
}Continuous sending
}Xon/Xoff when sending
}Xon/Xoff when receiving
}RTS and CTS activated
4.4.2 Receive buffer threshold
The number of Bytes in a receive buffer of the module is defined with this value, from which
the status bit "Receive buffer full" is set (default value: 512).

Installation
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5 Installation
5.1 General installation guidelines
Please refer also to the PSSuniversal Installation Manual.
NOTICE
Damage due to electrostatic discharge!
Electrostatic discharge can damage components. Ensure against discharge
before touching the product, e.g. by touching an earthed, conductive sur-
face or by wearing an earthed armband.
5.1.1 Dimensions
Base modules with four connection levels:
12,6 mm
76 mm
52,1 mm8,1 mm
67,7 mm
12,6 mm
56,1 mm 71,8 mm 0,8 mm
128,9 mm
72,6 mm
(2.051")(0.319")
(0.496") (2.858")
(0.496")
(2.99")
(2.209") (2.827") (0.031")
(5.075")
(2.665")

Installation
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Base modules with six connection levels:
12,6 mm
76 mm
52,1 mm8,1 mm
67,7 mm
82,0 mm 71,8 mm 0,8 mm
72,6 mm
(2.051")(0.319")
(2.858")
(0.496")
(2.99")
(3.228") (2.827") (0.031")
(2.665")
12,6 mm
(0.496")
154,6 mm (6.087")

Installation
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5.2 Installing the base module
Prerequisite:
}The head module must be installed.
}If the head module does not have an integrated power supply, a supply voltage module
must be installed to the right of the head module.
Please note:
}For mechanical reasons it is not possible to mix base modules with screw terminals and
base modules with cage clamp terminals.
}All contacts should be protected from contamination.
}The mechanics of the base modules are designed for 50 plug in/out cycles.
Procedure:
}We recommend that you wire up the base modules before inserting the electronic mod-
ules.
}Slot the groove on the base module on to the mounting rail from below [1].
}Push the base module back [2] until you hear it lock into position.
}On the mounting rail, slide the base module to the left until you hear the two lateral
mounting hooks on the adjacent module lock into position [3].
Schematic representation:
[2]
[1]
[3]

Installation
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5.3 Inserting and removing an electronic module
Please note:
}Only insert on to base modules that are already installed.
}Preferably these base modules should be ready wired.
}Electronic modules with outputs may only be inserted and removed when the load is
switched off. Unforeseeable error reactions may be triggered if modules are inserted
and removed under load.
}When an electronic module is plugged into a base module for the first time, one part of
the coding element remains on the electronic module, while its counterpart is fixed on to
the base module. This is how the base module is coded.
}The mechanics of the electronic modules are designed for 50 plug in/out cycles.
5.3.1 Inserting an electronic module
Procedure:
}The electronic module must audibly lock into position [1].
}Mark the electronic module using the labelling strips [2].
Schematic representation:
[2]
[1]
[1]

Installation
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5.3.2 Removing an electronic module
Procedure:
}Press the locking mechanisms [1] together simultaneously.
}Pull out the electronic module [2].
Schematic representation:
[1]
[2]
[1]
5.3.3 Changing an electronic module during operation
It is possible to change an electronic module during operation. However, changing an elec-
tronic module during operation may cause an ST communication error. The configuration
data is retained when a module is changed.

Wiring
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6 Wiring
6.1 General wiring guidelines
Please note:
}The supply voltages for actuators and sensors must be extra low voltages with protect-
ive electrical separation (PELV or SELV) in accordance with VDE0100, Part 410. Fail-
ure to do so could result in electric shock.
}We recommend that you use shielded signal lines.
}On base modules with C-rail:
– Connect the shield to the terminals on the C-rail.
– Connect the C-rail with low impedance to the functional earth.
}On base modules without C-rail:
– Connect the shield as shown in the terminal configuration section.
The module connects the shield to the mounting rail.
– Connect the mounting rail to the functional earth via an earthing terminal.
}In environments with strong EMC interference, base modules without a C-rail provide
better protection if the shield is connected.
}Use copper wiring.
}The terminal configuration as stated on the front plate applies for base modules with C-
rail. The terminal configuration as stated in the technical documentation applies for all
other base modules.
6.1.1 Mechanical connection of the base modules
Procedure:
}Use a flat blade screwdriver (DIN 5264-A)!
DIN 5264-A
}Strip the wire back 8 mm.
}If necessary, label the connection level with a colour marker [3].
}Base module with screw terminals:
– Use a screwdriver to loosen the screw on the screw terminal [1]
– Insert the stripped cable into the round fixing hole [2], as far as it will go.
– Tighten up the screw on the screw terminal.
– Check that the cable is firmly seated.