Siemens SIMATIC ET 200eco PN - Wiring the ET 200 eco PN

Wiring
3.5 Wiring the ET 200eco PN
ET 200eco PN
Operating Instructions, 08/2016, A5E01250250-AJ
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3.5
Wiring the ET 200eco PN
3.5.1
Wiring the ET 200eco PN to functional earth (FE)
Introduction
You must connect the ET 200eco PN with the functional earth (FE).
What is functional ground?
All ET 200eco PN I/O devices have a functional earth connection. This connection is used to
suppress interference but not for protective purposes. You establish a direction electrical
connection to a point in your plant or a shield using the functional earth connection. EMC
interference is discharged directly to earth through this connection. The interference
immunity of the entire I/O device is increased by the discharge of the EMC interference.
Install ET 200eco PN I/O devices on conductive base
Requirements
Conductive base for installation of the I/O device.
Tools required
You need the following tools to connect to the functional ground:
● Screwdriver
Required accessories
You need the following accessories to connect to the functional ground:
● 2 x M5 x 8 fixing screws and washers
Installation
To connect ET 200eco PN I/O devices to functional earth with conductive base, follow these
steps:
● Drill 2 fixing holes.
● Bolt the I/O device with the M5 fixing screws and washes using a torque of 1.5 Nm.
Note
Grounding with conductive base
When you fasten an I/O device of ET 200eco PN to a conductive, grounded base, the lower
fixing screw creates a conductive connection to the ground pote
ntial.
Make sure there is a low
-impedance connection between the peripheral device and the
conductive substrate and between the conductive substrate and the functional ground.