NOTICE!
Note the maximum I/O bus current!
Observe the maximum current that your Bus Coupler can supply to the I/O bus!
Electrical installation
Operation Manual
Safety I/O Terminals
SI4000 / SO4000
Document no.: 5.08009.05
Baumüller Nürnberg GmbH
38
6.4
m
The power contacts deal with the supply for the field electronics and thus represent a
supply rail within the bus terminal block. The power contacts are supplied via terminals
on the Bus Coupler.
NOTICE!
Note the pin assignment of the power contacts!
During the design of a bus terminal block, the pin assignment of the individual Bus
Terminals must be taken account of, since some types (e.g. analog Bus Terminals or
digital 4-channel Bus Terminals) do not or not fully loop through the power contacts.
Power Feed Terminals (ES0000) interrupt the power contacts and thus represent the
start of a new supply rail.
PE power contact
The power contact labeled PE can be used as a protective earth. For safety reasons this
contact mates first when plugging together, and can ground short-circuit currents of up to
125 A.
CAUTION!
Danger from damage of the terminal
Note that, for reasons of electromagnetic compatibility, the PE contacts are capaci-
tatively coupled to the mounting rail. This may lead to incorrect results during insula-
tion testing or to damage on the terminal (e.g. disruptive discharge to the PE line
during insulation testing of a consumer with a nominal voltage of 230 V).
Therefore:
m
For insulation testing, disconnect the PE supply line at the Bus Coupler or the Pow-
er Feed Terminal! In order to decouple further feed points for testing, these Power
Feed Terminals can be released and pulled at least 10 mm from the group of ter-
minals.
DANGER!
Serious risk of injury!
The PE power contact must not be used for other potentials!
Summary of Contents for SI4000
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