4.8 Floating relay contacts
Potential-free contacts for the transmission of messages are provided.
For information on location, loading capacity, and message type please see electrical wiring dia‐
grams options in Chapter 13.6.
If the floating relay contacts are connected to an external voltage source, voltage may be
present even when the machine is isolated from the power supply.
4.9 Options
The options available for your machine are described below.
4.9.1 Option C5
Oil level monitor
This device monitors the level of lubricating oil in the blower block.
This electronic monitoring does not relieve the obligation to make regular manual checks of the oil
level.
Functional description
Two float-type level sensors monitor the level of oil in the drive and gear-end oil chambers. If the oil
level falls below the minimum level, a switching contact is opened. The resulting signal is interpre‐
ted by external components provided by the user.
4.9.2 Option C9
Pressure switch
The pressure switch sends a signal when the set pressure is exceeded.
The pressure switch is factory set according to the customer's specification.
In other cases it must be set according to the application.
Fig. 11 Pressure switch
1
Switching point adjusting screw
2
Switching differential adjusting screw
3
Screw sealed with a protective coating
The switching point can be adjusted by the screw
1
while the machine is running.
4
Design and Function
4.8
Floating relay contacts
Number: 9_9572 28 USE
Installation and Operating Manual Rotary lobe blower
HBPI pr
29
