Conventions - Danfoss VLT PTC Thermistor Card MCB 112 Operating Manual

VLT® PTC Thermistor Card MCB 112
Operating Guide
Abbreviation
NC
PNP
TNF
Abbreviation Reference
ATEX ATEX Directive 2014/34/EU
HFT EN IEC 61508
PDS/SR EN IEC 61800-5-2
PFD EN IEC 61508
SFF EN IEC 61508
SIL EN IEC 61508, EN IEC 62061
STO EN IEC 61800-5-2
SRECS EN IEC 62061

1.7.2 Conventions

• Numbered lists indicate procedures.
• Bulleted and dashed lists indicate listings of other information where the order of the information is not relevant.
• Bolded text indicates highlighting and section headings.
• Italicized text indicates the following:
- Cross-reference.
- Link.
- Footnote.
- Parameter name.
- Parameter option.
- Parameter group name.
• All dimensions in drawings are in metric values (imperial values in brackets).
• An asterisk (*) indicates the default setting of a parameter.
10 | Danfoss A/S © 2022.08
Description
Not connected
Positive negative positive (transistor)
Nominal response temperature
Description
ATmosphere EXplosibles.
Hardware fault tolerance: HFT=n means that n+1 faults could cause a loss of the
safety function.
Power drive system (safety-related).
Average probability of failure on demand, value used for low-demand operation.
Safe failure fraction [%]; percentage of safe failures and dangerous detected fail-
ures of a safety function or a subsystem related to all failures.
Safety integrity level.
Safe Torque Off
Safety-related electrical control system.
Introduction
AQ267038105120en-000101 / 130R0104