5.4
Optional installation components
The following separately certified components can be installed optionally:
● Terminals:
– Ex e for the connection of cable cross-sections >4 mm,
– Ex i for wiring of intrinsically safe signals (blue); these may only be used for Ex i signals.
Make sure when arranging intrinsically safe and non-intrinsically safe terminals that they
are separated ("thread measure") by at least 50 mm.
● Temperature sensors:
For monitoring the temperature inside the enclosure,
● Relays, disconnectors and fuses:
For interrupting, switching or protecting individual signal circuits.
● Command and signaling devices:
For manual switching (control switch) or optical display (indicator lamps) in the enclosure
wall.
● FO couplers:
For connecting the PROFIBUS of the ET 200iSP by means of FO cable
● Lightning protection components:
For protecting the ET 200iSP components from lighting strikes when the enclosure is
installed in exposed locations.
● Heater:
To prevent condensation in the enclosure at low temperatures, it is recommendable to
install a heater. The heater must be dimensioned in accordance with the enclosure size.
A heater permits operation of the devices at temperatures below -20 °C.
Note
If components with a supply voltage of 120 / 230 V AC are installed, you must fuse these
devices according to DIN 41571 and/or IEC 60127 or in accordance with the manufacturer's
data.
● Electro-pneumatic systems and components for use in Zone 2:
When connecting and operating, observe the manufacturer's descriptions and manuals.
When installing a pneumatic system, exit the air passing through the exhaust connections
out of the enclosure.
NOTICE
Damage to seal or screwed glands
Make sure that the vent of the pneumatic system does not blow directly into the enclosure.
The pressure resulting in the enclosure would otherwise damage the seal and screwed
glands, and the degree of protection would no longer be provided.
Mounting
5.4 Optional installation components
Distributed I/O 6DL2804-3xxxx & 6DL2804-4xxxx
22
Hardware Installation Manual, 04/2017, A5E41591350-AA
