Connecting The Equipotential Bonding - Siemens SIMATIC 577 Operating Instructions Manual

Connecting the power supply
Steps for connecting the device to the 110 / 230 V AC power supply
1
2
3
1.6.3

Connecting the equipotential bonding

A low-impedance ground connection ensures that interference signals generated by external
power supply cables, signal cables or cables to the I/O modules are safely discharged to
ground. The equipotential bonding connection of the device is located at the connection
elements of the computer unit and is identified by the following symbol:
Figure 1-4
Connecting the equipotential bonding
Required tool for equipotential bonding terminal: TORX T20 screwdriver
Steps for connecting the equipotential bonding
(1)
SIMATIC Panel PC 577
Operating Instructions, Release 04/2006, A5E00795255
Switch off the AC power source.
Connect the power supply using the plug.
Lock the power plug to the device (1).
Equipotential bonding
Connect the equipotential bonding connection (M4
thread) (1) on the device (large surface, large-area
contact) with the central grounding point of the control
cabinet.
The minimum conductor cross-section may not
amount to less than 5 mm .
2
Operating Instructions (compact)
1.6 Connecting
1-15