3 Connect relay box to EWR 2 / EWR 2 Net
Marking
NO (normally open)
CO (change over)
NC (normally closed)
Tab. 2
3 Connect relay box to EWR 2 / EWR 2 Net
NOTICE
Material damages due to modifications of cable connections
Modifications at the cable connection between the relay box and the EWR2/EWR 2 Net
can cause malfunctions and material damages to the devices.
Those damages are not subject to the guarantee.
• Do not make any structural modifications to the device.
Figure on title page
The following components must be on hand to use the relay box:
• EWR 2 / EWR 2 Net with firmware
status 1.4 or higher
Tab. 3
1 Screw the T-piece (6) into the connector for the EWR 2 / EWR 2 Net power supply (7).
2 Attach the relay box cable to the relay box connector at the T-piece (2).
3 Attach the power supply to the power supply connector at the T-piece (5).
4 Relay box default settings
The relay box factory settings stipulate that the relay switches if the EWR 2 / EWR 2 Net
displays one or more of the following errors:
Error
Calibration error
Tab. 4
EN - 6
Relay box terminal assignment
Required components
Cause
Calibration values in the device are not available.
Errors that switch the relay as defined in the factory settings
Terminal assignment
Normally open contact (make contact)
Changeover contact
Normally closed contact (break contact)
• T-piece
• Relay box
BEI.0339.0 • 2021-12-14
EWR 2 / EWR 2 Net