Ensuring Readiness For Operation - Siemens SIMATIC Panel PC 870 Equipment Manual

2.2

Ensuring readiness for operation

Connecting and turning on the computing unit
Before you connect the computing unit to the mains, connect the operating unit
(see Equipment Manual "Operating Unit") and, as applicable, appropriate
peripherals (see Chapter 3):
1. Plug the connecting cables into the appropriate female connectors on the
interface side of the computing unit (see Sections 3.1 and 3.2).
2. Before you connect the device to the mains, observe the following information
with regard to the power supply and the equipotential bonding.
Since the computing unit does not possess a mains switch, it will be ready for
service immediately after the mains plug has been connected.
Power supply
Socket connector for
AC–powered non–hea-
ting appliances
(with DC–powered devi-
ces, a screw–type termi-
nal as an option)
Figure 2-1 Power supply connection
The AC power supply of the computing unit is designed for 120/240V systems.
The power supply has a wide–range input; therefore, no setting of the voltage
range is required.
The DC power supply of the computing unit is designed for 24V systems.
Mains supply
The device is intended for connection to grounded power supply systems
(TN systems to VDE 0100, Part 300, or IEC 364-3).
No provision is made for connection to non-grounded or impedance-grounded
power supply systems (IT networks).
Panel PC 870 Computing Unit Equipment Manual
Edition 12/01
Starting Up the Computing Unit
Equipotential bon-
ding connection
2-3