DURAG D-R 290, Operating Manual

Page: 92 / 202

5 | Installation
92 D-R 290
Configuring the protective device
After installation of all the components of the protective device (shutter, control elec­
tronics, air flow sensor) the D-R 290 measuring head configuration must be parame­
terised for the protective device (the presence of the air flow sensor and fail-safe shut­
ter(s)).
Setting path:
> Specific parameters > D-R 290 configuration > Purge air sensor 1 present and
> Specific parameters > D-R 290 configuration > fail-safe shutter 1 present
or
> Specific parameters > D-R 290 configuration > Purge air sensor 2 present and
> Specific parameters > D-R 290 configuration > fail-safe shutter 2 present
The fail-safe shutter is closed during installation and parameterisation. It opens once
the air flow sensor has detected the presence of the purge air.
WARNING High risk of injury due to sudden closure of the shutter
▶
Never insert fingers into the closing area of the fail-safe shutter.
▶
Before maintenance work:
Unplug the connection plug at the measuring head for the fail-safe shutter.
(Caution,
when the connection is broken, the fail-safe shutter closes very quickly)
Checking the protective device
When the mains power is switched on (check the charge status of the supercaps
[
}
196] ; see below) and the purge air is present, the fail-safe shutter automatically
switches to the “
OPEN“ position.
If the power supply or the purge air fails, the fail-safe shutter of the protective device
switches to the “
CLOSED“ position. In this case the D‑SK AE control electronics pro­
vides the necessary power via the maintenance-free supercaps. After the failure has
been rectified the fail-safe shutter automatically switches back to the “
OPEN“ position.
The status feedback message
"Shutter OPEN“ is set at terminals 7 and 8 (connection
closed) in the control electronics.
The charge status of the supercaps is indicated by the green
“Battery check LED“ on
the front panel. When the supercaps are charged the LED lights up.
The LEDs indicate only the activation, but not the shutter position. The feedback
message for the shutter position is given via the cam switch in the rotary drive.
5.5.5
5.5.6