IEC 61131-2:2007

IEC 61131-2 ®
Edition 3.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Programmable controllers –
Part 2: Equipment requirements and tests

Automates programmables –
Partie 2: Exigences et essais des équipements

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IEC 61131-2 ®
Edition 3.0 2007-07
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Programmable controllers –
Part 2: Equipment requirements and tests

Automates programmables –
Partie 2: Exigences et essais des équipements

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XF
ICS 25.040.40; 35.240.50 ISBN 978-2-88912-076-5

– 2 – 61131-2  IEC:2007
CONTENTS
FOREWORD . 10
INTRODUCTION . 12

1 General . 14
1.1 Scope and object. 14
1.2 Compliance with this standard . 15
1.3 Normative references . 15
2 Type tests . 18
2.1 Equipment to be tested (equipment under test/EUT) . 18
2.2 Special features for immunity and EMC tests . 20
2.3 Withstand test conditions . 21
2.4 Verification procedure . 21
2.5 Requirements for test programmes and proper functioning verification
procedures (PFVPs) to be provided by the manufacturer . 21
2.6 General conditions for tests . 22
3 Terms and definitions . 22
4 Normal service conditions and requirements . 29
4.1 Climatic conditions and requirements . 30
4.1.1 Operating ambient air temperature . 30
4.1.2 Relative humidity . 30
4.1.3 Altitude . 30
4.1.4 Pollution degree . 30
4.2 Mechanical service conditions and requirements . 30
4.2.1 Vibrations . 31
4.2.2 Shock . 31
4.2.3 Free falls (portable and hand-held equipment) . 31
4.3 Transport and storage conditions and requirements . 32
4.3.1 Temperature . 32
4.3.2 Relative humidity . 32
4.3.3 Altitude . 32
4.3.4 Free falls (PLC units in manufacturer's original packaging) . 32
4.3.5 Other conditions . 33
4.4 Electrical service conditions and requirements . 33
4.4.1 AC and d.c. equipment power supply . 33
4.4.2 Overvoltage category, control of transient overvoltages . 33
4.4.3 Non-periodic overvoltages . 33
4.5 Special conditions and requirements . 33
5 Functional requirements . 33
5.1 Functional power supply and memory back-up requirements . 35
5.1.1 AC and d.c. power supply . 35
5.1.2 Memory back-up . 36
5.2 Digital I/Os . 37
5.2.1 Digital inputs (current sinking) . 38
5.2.2 Digital outputs for alternating currents (current sourcing) . 39
5.2.3 Digital outputs for direct current (current sourcing) . 42

61131-2  IEC:2007 – 3 –
5.3 Analogue I/Os . 43
5.3.1 Analogue inputs . 43
5.3.2 Analogue outputs. 44
5.4 Communication interface requirements . 44
5.5 Main processing unit(s) and memory(ies) of the PLC-system requirements . 44
5.6 Remote input/output stations (RIOSs) requirements . 44
5.7 Peripherals (PADTs, TEs, HMIs) requirements . 45
5.8 PLC-system self-tests and diagnostics requirements . 45
5.9 Functional earthing . 46
5.10 Mounting requirements . 46
5.11 General marking requirements . 46
5.11.1 Functional identifications . 46
5.11.2 Module location and module identifications . 46
5.11.3 Functional earth terminals markings . 46
5.12 Requirements for normal service and functional type tests and verifications . 47
5.13 Requirements for information on normal service and function . 47
6 Normal service and functional type tests and verifications . 47
6.1 Climatic tests . 47
6.2 Dry-heat and cold withstand tests . 47
6.2.1 Variation of temperature . 48
6.2.2 Cyclic damp heat withstand test . 49
6.3 Mechanical tests . 50
6.3.1 Vibration (type test associated with normal service conditions) . 50
6.3.2 Shock (type test associated with normal service conditions) . 50
6.3.3 Free fall (type test associated with normal service conditions) . 51
6.3.4 Free fall (type test associated with transport and storage conditions) . 51
6.3.5 Plugging/unplugging of removable units. 51
6.4 Verification of special functional requirements for power ports and memory
back-up – Special immunity limits for power ports . 51
6.4.1 Verification of functional equipment power input port (a.c. or d.c.) . 52
6.4.2 External energy supply variation tests (immunity tests) . 53
6.4.3 Improper equipment power supply connection tests . 56
6.4.4 Verification of memory back-up requirements . 57
6.5 Verification of input/output requirements . 57
6.5.1 General . 57
6.5.2 Verification of digital inputs . 58
6.5.3 Verification of digital outputs . 58
6.5.4 Verification of analogue I/Os. 59
6.6 Verification of communication interface requirements . 60
6.7 Verification of MPU requirements .
...