Application planning
4.3 Selecting potential distributor modules
Distributed I/O system
46 System Manual, 09/2019, A5E03576849-AJ
4.3.2 Selecting a PotDis-TerminalBlock
Selection of a suitable PotDis-TerminalBlock
With a PotDis-TerminalBlock you are expanding a PotDis-BaseUnit potential distributor
module by an additional 18 potential terminals.
You can freely combine PotDis-TerminalBlocks and PotDis-BaseUnits.
The following PotDis-TerminalBlocks are available:
Table 4- 3 Selection of TerminalBlock PotDis-TB
PotDis-TB-P1-R Terminal block with 18 terminals with red spring
releases with connection to the supply voltage
P1 of the PotDis-BaseUnit with SELV/PELV.
Provision of 18 x P1 potential, e.g. for P1 sensor
supply with 3-wire connection for 16-channel digital
PotDis-TB-P2-B Terminal block with 18 terminals with blue
spring releases with connection to ground (P2)
Provision of 18 x P2 potential, e.g. for ground of
the sensor supply with 2-wire connection for 16-
channel digital output modules
PotDis-TB-n.c.-G Terminal block with 18 terminals with gray
spring releases without connection to each
other or to a voltage bus of the PotDis-BaseUnit
Provision of 18 x n.c. (not connected), for reserving
("parking") unused signals/lines, e.g. for antivalent
sensors in the same potential group
PotDis-TB-BR-W Terminal block with 18 terminals connected to
each other with white spring releases without
connection to a voltage bus of the PotDis-
Provision of 17 terminals with shared potential (the
18th terminal is used for infeed) for supply of ex-
ternal consumers
Additional information
Additional information on the potential distributor modules (PotDis-BaseUnits and PotDis-
TerminalBlocks) is available in the BaseUnits
(http://support.automation.siemens.com/WW/view/en/59753521
) manual.
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