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EWR 2 / EWR 2 Net
5 Functional description
The device is an electronic gas management system with a closed loop gas system. The shielding gas flow during the welding
process is optimized in terms of gas consumption and process stability. This compact device consists of a housing with display
and touch buttons, as well as a status LED. It also has a proportional valve and pressure sensors. The EWR 2 Net device
version has a measurement shunt interface, a CANopen interface, and an Ethernet interface. Figure 1 is an enlarged
illustration of the device to scale. The device adjusts the gas supply according to a characteristic curve adjusted in
accordance with the welding process.
13.6 Shunt types on page EN-23
1
Mounting direction
18
17
16
15
14
1
Jack connector
2
LED status display
3
Touch buttons (total of 4)
4
OK button
5
Slots for mounting (total of 4)
Fig. 1
Functional description
* Available only with EWR 2 Net version
5.1 Fluid plan
Fig. 2
Fluid plan
BAL.0598 • 2018-04-09
2
3
13
12
11
10
6
Gas discharge line
10 Ethernet connector*
(connecting piece 6 mm)
11 CAN open connector*
7
Power source
12 Measurement shunt connector
8
Wire feeder
13 Power IN connector
9
Shunt
14 Power supply
IN/OUT
Input/output
P
P
Relative pressure sensor
IN,
OUT
p
Differential pressure sensor
Proportional solenoid valve
PV
BI
Metering orifice
5 Functional description
4
5
6
15 Shielding gas supply
16 Gas supply line
(connecting piece 6 mm)
17 Display
18 Power button (ESC)
7
8
9
EN - 7
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