8.6
Replacing a terminal block
Introduction
The terminals for connecting the supply voltage and process terminals are components of the
terminal block. You can replace the terminal block if necessary. This requires the I/O module
to be removed.
NOTICE
Power busbars of the potential group are interrupted
The power busbars of potential groups are interrupted when a terminal block is replaced.
● When you position a light-colored terminal block on the left next to a dark-colored terminal
block, the light-colored terminal block interrupts the power bus to the left and opens a new
potential group at the same time.
● When you replace a light-colored terminal block with a dark-colored terminal block, the
potential groups are interconnected.
Requirements
● The terminal block is installed, wired and equipped with an I/O module.
● Only replace the terminal block when the supply voltage is switched off.
Tools required
3 to 3.5 mm screwdriver
Maintenance
8.6 Replacing a terminal block
ET 200SP HA Distributed I/O system
System Manual, 08/2019, A5E39261167-AD
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Summary of Contents for SIMATIC ET 200SP HA
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