Appendix
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520
N Negative switching (sourcing) BL20-2DI-24VDC-N
NC engl. normally closed normally closed contact BL20-2DO-R-NC
NI For connecting resistance thermometers with sensors
Ni100 and NI1000 in 2- or 3-wire measurement type
BL20-2AI-PT/NI-2/3
NO engl. normally open normally open contact BL20-2DO-R-NO
P Positive switching BL20-2DI-24VDC-P
P Designation of the base module for Power Feeding and
Bus Refreshing modules
BL20-P3T-SBB
PBDP BL20 gateway for PROFIBUS-DP BL20-GW-PBDP-1.5MB
PF Power Feeding module BL20-PF-24VDC-D
PT Analog input module for connecting resistance ther-
mometers with sensors PT100, PT200, PT500 and
PT1000 in 2- or 3-wire measurement type
BL20-2AI-PT/NI-2/3
QV Jumper for relay modules BL20-QV/1
R Relay module BL20-2DO-R-NC
S Designation for base module in slice design BL20-S3T-SBB
S engl. screw Designation for base module with screw
connection
BL20-S3S-SBB
S engl. screw Designation for gateway with screw con-
nection
BL20-GW-PBDB-1.5MB-S
S engl. single connector: non-bridged connections on
the same connection level in a base module, used for
connecting the signal
BL20-S3T-SBB
T engl. tension clamp Designation for base module with
tension clamp connection
BL20-S3T-SBB
x Partly for ”S” or ”T” in the designations of base modules
with screw or tension clamp connection
BL20-S3×-SBB
Abbrev. Designation Example
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