2
021-
03
22
Installation
The switch provides a relay contact output for status indication.
Spur Connection
Figure 3.10
Screw terminal
Figure 3.11
Spring terminal
The Ethernet-APL field devices are connected through a pluggable 3-pin connector.
3.4
Grounding / Shielding
Grounding the Device
The grounding terminal is marked with "PA".
The device provides a grounding terminal to which an equipotential bonding conductor with a
minimum cross section of 4 mm
²
must be connected.
-
+
S
-
+
S
Danger!
Explosion hazard from wrong or missing grounding!
Wrong or missing grounding can cause sparks. This can ignite the surrounding potentially
explosive atmosphere.
■
Ground the device. Observe the grounding requirements for type of protection Ex i
according to IEC/EN 60079-14.
■
Ensure that external ground connections exist, are in good condition, and are not
damaged or corroded.
Caution!
Risk of electric shock or property damage from inadequate grounding!
If you fail to connect all metal parts of the device to protective local earth correctly, this could
result in potential equalization currents. These currents could hurt operating personnel or
cause property damage.
■
The grounding terminal is not a safety earth: Do not use the grounding terminal to ground
exposed metal parts.
■
Ground exposed metal parts of the device separately. Ensure that a correct grounding is
guaranteed at all times.
