7
5.2 Resistance
Arti fi cial leather
coati ng
NBR
coati ng*
Eff ect
solvent
Wipe
1 h
24 h
Wipe
1h
24 h
Water
1
1
1
1
1
1
Detergent
1
1
1
1
1
1
Causti c-soda 10%
1
1
1
3
4
4
Ammonia 10%
1
1
1
-
-
-
Aceti c acid 10%
1
1
1
3
4
4
Sulphuric acid 10%
1
1
1
3
4
4
Ethyl alcohol
1
2
3
-
-
-
Ethyl acetate
4
5
6
-
-
-
Acetone
4
5
6
-
-
-
Gasoline
1
2
3
1
2
3
Diesel
1
1
1
1
2
3
Engine oil
1
1
2
1
2
2
Transmission oil
1
1
2
1
2
2
*Please see technical informati on: Product informati on SENTIR bumper NBR
1 = no eff ects
Permanent contact allowed
2 = few eff ects
contact allowed
3 = medium eff ects
contact allowed
4 = noti ceable eff ects
contact restricted
5 = strong eff ects
very brief contact
6 = extreme eff ects
avoid contact
- = without specifi cati on/test
The listed material properti es are considered as guideline.
Criti cal applicati ons have to be tested directly at the actual applicati on.
5.3 The signal processing
!
Evaluati on electronic
Relay output
Supply voltage
Terminal resistor 8,2 kΩ
To avoid the risk of crushing, Safety gloves must be worn!
Please pay a� enti on to:
The SENTIR bumper is equipped with two two-core cables which allow for series connecti on. The maximum number of
connected bumpers is 5 and the total length of the system must not exceed 25 m. One line end connected to the evaluati on
eletronic and the other end with a terminati ng resistor (factory-made). The electronic monitor the whole circuit, including
sensor and terminati ng resistor. By extern force the contact areas bridge the resistor. The evaluati on eletronic detects the
change of the resistance and via the potenti al-free relay contact give a signal to the machine control. Additi onal the hole
system is monitoring on cable break or manipulati on. Opti onally the bumper can be use under cross-fault monitoring.
