eWON4001™
Installation Guide
ver 2.1
page 10 of 31
3.5 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 eWON4001™ 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:
3.6 Preparing the installation
The recommended free space in the cabinet for the eWON should be at least: 50-mm wide x 225-mm high x 200-
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 back of the unit just below the DIN latch. Connect
this screw directly to a low impedance ground.
3.7 Specification for external power supply selection
The eWON4001™ has to be supplied by an external voltage source ranging from 12 to 24 VDC. The power supplied
must be a Class2 or Level 3, SELV-compliant (security voltage) and limited in current to a max of 500mA. The safety
voltage power supply is not part of the delivery. The data given below is intended to allow correct selection of the
external power supply.
(*) Properly ground the unit with the earth screw at the bottom of the unit. This is a must 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 0°C to +50°C
Ambient humidity 0-80% non-condensing
Specification Value
Secondary PS voltage from 12 to 24 VDC +/-20% (SELV-compliant)
Max secondary PS current 300 mA max.
eWON current protection 300 mA by auto fuse
eWON voltage protection 30V by varistor
eWON EMI filter Common mode filter (*)
Power absorbed (typ)
5 Watts (eWON4001™ PSTN)
6 Watts (eWON4001™ GSM/GPRS)
Table 5: Specification for external power supply selection
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