4
3
1
2
5
Fig. 1:
Position of the stickers on the product
1 Hot surface warning sign
4
Warning sign for live voltage
2 Operating instructions note
5
Rating plate of the rotary vane vacuum pump
3 Prohibition sign - No stepping on surface
1.3.4 Abbreviations
Abbreviation Meaning in this document
OI
Operating instructions
CB
Certified body according to IEC (international electrotechnical commission)
DI
Digital Input
DO
Digital Output
f
Rotation speed value of a vacuum pump (frequency, in rpm or Hz)
FCC
Federal Communications Commission (USA)
N/A
not connected
N.N.
Mean sea level
NRTL
Nationally Recognized Test Laboratory
[P:xxx]
Parameters are printed in bold as three-digit numbers in square brackets. Example:
[P:xxx] Software version
PC
Personal computer
PE
Protective earth (earthed conductor)
PFC
Power factor correction circuitry in power supply pack
RCD
Residual Current Device
RS-485
Standard for a physical interface for asynchronous serial data transmission (recom-
mended standard)
WAF
Width Across Flats
MM
Maintenance manual
Tbl. 2:
Abbreviations used in this document
About this manual
9/68