9
Description
GB
Model 9010/9020 SIL
Symbols and Abbreviations Used in this Manual
The board is available in two versions:
Description
ACK Acknowledgement
EMC Electromagnetic Compliance
FS Full Scale
LED Light Emission Diode
LEL Lower Explosive Limit - measurement units for gas detection point detectors
LELm
Lower Explosion Limit meter - measurement units for gas detection open path detec-
tors
PCB Printed Circuit Board
SPDT Single Pole Dual Throw
STEL Short Time Exposure Limit
TWA Time Weighted Exposure Limit
VAC Alternate Current Voltage
VDC Direct Current Voltage
SCADA Supervisory Control and Data Acquisition
PLC Programmable Logic Controller
DCS Distributed Control System
SIL Safety Integrity Level
Earth Terminal
Protective Conductor Terminal
Important Note
Caution, risk of danger (See note)
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