eWON
2101CD™
Installation Guide
ver 1.6
page 14 of 34
3.6 Mounting and environmental conditions
The eWON unit has an IP31 protection grade. It is therefore not suited for outdoor mounting. The design of
the unit is such that it has to be integrated in an enclosed electrical cabinet, protected from excessive heat,
humidity and dust. The eWON2101CD™ is complying to the CE-marking requirements regarding
electromagnetic compatibility (EMC) within an industrial environment.
The normal mounting position is wall mounted on DIN-rail (EN 50022). The unit is suited to work in any other
position.
The equipment will operate within specified tolerances only if the following environmental conditions are
respected:
3.7 Preparing the installation
The recommended free space in the cabinet for the eWON should be at least: 80-mm wide x 200-mm high x
160-mm deep (terminal block excluded). A piece of rigid DIN-rail profile (flat 35mm wide) of suitable length
should be firmly fastened, horizontally, in the middle of the area.
Grounding the eWON is necessary to eliminate unwanted transients (lightning protection) and to conform to
the EMC requirements. Therefore, a ground screw is available at the top of the unit. Connect this screw
directly to a low impedance ground.
3.8 Specification for external power supply selection
The eWON2101CD™ has to be supplied by an external voltage source ranging from 12 to 24 VDC. The
power supplied must be a Class 2 or Level 3, SELV-compliant (Safety Extra Low Voltage) and limited in
current to a max of 850mA. The safety voltage power supply is not part of the delivery. .
(*) Properly ground the unit with the earth screw at the top of the unit. This is mandatory to ensure
the security and the electro mechanical compatibility (EMC) of the device.
Equipment Supplied by Class 2 or Level 3 Power Supply.
Ambient temperature range
-20°C to +70°C for eWON with GPRS QB or UMTS Global modem
0°C to +50°C for eWON with PSTN or ISDN modem
Ambient humidity
0-80% non-condensing
Specification
Value
Secondary PS voltage
from 12 to 24 VDC +/-20% (SELV-compliant)
Max secondary PS current
850 mA max.
eWON current protection
2A by auto fuse
eWON voltage protection
30V by transil
eWON EMI filter
Common mode filter (*)
Power absorbed
10 Watts
Input Protection
Protected against polrity inversion
Table 3: Specification for external power supply selection
