ESA EW2 Series, Installation Manual

Page: 15 / 28

EN_English
WARNING
IMPORTANT: Please read
carefully these instructions
before mounting the product.
Dimensions and holes
EW212A – Fig. 1 . 3
EW212B – Fig. 2 . 3
EW215A – Fig. 4 . 6
EW215B – Fig. 5 . 6
EW218A – Fig. 7 . 9
EW218B – Fig. 8 . 9
EW222A – Fig. 10 . 12
EW222B – Fig. 11 . 12
Front view
EW2xxA – Fig. 13
1) Universal Serial Bus port.
2) Power led.
Rear view
EW2 – Fig. 16 . 17
A) See motherboard manual.
B) COM - See motherboard manual.
C) POWER (ATX power on switch) -
See motherboard manual.
D) Power supply.
E) Slot PCI/PCIe.
F) Slot for HDD/SSD/CFast.
Connection cables
In order to limit as much as
possible the influence of these
disturbances good quality shielded
cables must be used.
Specifications of serial connection
cable:
!
Direct current resistance - Max.
151 Ohm/Km
!
Capacity coupling - Max.
29pF/m
!
Shielding > 80% or total
Always:
!
Find the shortest route.
!
Lay disturbed cables separately.
!
Use connectors with metal or
conduc-tive plastic shells.
Connect the serial cable shield in
accordance with the instructions on
Fig. 26.
NOTE: The braiding must be
electrically connected both to the
connector body and shell.
The interface cable braiding must
be electrically connected both to
the shell and the body of the
connector at both ends of the
cable.
If the connection operation cannot
be carried out at the Device side
due to the particular type of serial
connector, the braiding will have to
be taken outside the connector and
connected to the earth terminal.
As for RS485-connection, please
follow the instructions by Fig. 27.
For strong spikes on the serial line
it’s, please use two noise-reducers
(eg Transil 600W 6.8 V) and
connect them as shown in Fig . 28.
Installation in potentially
explosive atmospheres
When EW2xxA is intended for use
in ATEX environment, the attached
ATEX KIT must be used and
properly applied. For further details
see the ATEX manual supplied with
the product.
WARNING : the closing plate must
be fixed before the EW2xx is
installed in ATEX environment.
Please follow the instructions by
Fig. 14.