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The reed contacts are tungsten, gold-rhodium-plated and are installed in an inert gas atmosphere.
Hence direct connection to the inputs of a PLC system is possible.
Wiring diagram for switches provided with connector (standard)
NO contact
Change over
5.2 Adjusting the switching point
The switching point is adjusted via the scale on the flow monitor. Please take into account that the
scale always indicates the shut-down point. That means:
when the flow rate is decreasing the NO (Normaly Open) contact will open when the set volume
is reached
when the flow rate is sufficient, the NO (Normaly Open) contact is closed
in case of an alarm (flow rate too low) the NO (Normaly Open) contact will open
6
Maintenance/Cleaning
IMPORTANT
Maintenance of the flow monitor may only be carried out by trained staff.
The flow monitor has only a few moving parts. Maintenance only involves cleaning these parts from
time to time.
6
7
Technical Data
Operating data
BFS-10-N 1"
Pressure MS
250 bar
Pressure MS with GL
100 bar
Pressure VA
300 bar
Pressure drop
0.02 - 0.4 bar
Temperature max.
100 °C
Electrical data – only valid for application in non-explosive atmosphere
Normally Open NO
250 V - 3 A - 100 VA
Change over*
250 V - 1.5 A - 50 VA
System of protection
IP65
Materials
Brass
Stainless steel
Housing
Brass
1.4571
Float
Brass
1.4571
Spring
1.4571
1.4571
Seals
none
none
Tolerance
±10% of FS
Switch housing with connector acc. to DIN EN 175 301-803-C (formerly DIN 43650-C) or 1 m pre-fitted cable
*
Minimum load: 3 VA; contact rating for PLC applications: 200 V, 1 A, 20 VA (Please request)
1)
HT: max. medium temperature: + 130 °C, max. ambient temperature: +125 C°
Operating data
BFS-10-O 1"
Pressure MS
10 bar
Pressure VA
10 bar
Pressure drop
0.02 - 0.4 bar
Temperature max.
100 °C
Electrical data – only valid for application in non-explosive atmosphere
Normally Open NO
250 V - 3 A - 100 VA
Change over*
250 V - 1.5 A - 50 VA
System of protection
IP65
Materials
Brass
Stainless steel
Housing
Aluminum
1.4571
anodized
Float
Brass
1.4571
Spring
1.4571
1.4571
Seals
none
none
Tolerance
±10% of FS
Switch housing with connector acc. to DIN EN 175 301-803-C (formerly DIN 43650-C) or 1 m pre-fitted cable
*
Minimum load: 3 VA; contact rating for PLC applications: 200 V, 1 A, 20 VA (Please request)
BFS-10-N ½"
BFS-10-N ¼"
300 bar
300 bar
100 bar
100 bar
350 bar
350 bar
0.02 - 0.3 bar
0.02 - 0.2 bar
1)
100 °C
100 °C
230 V - 3 A - 60 VA
200 V - 1 A - 20 VA
250 V - 1.5 A - 50 VA
200 V - 1 A - 20 VA
IP65
IP65
Brass
Stainless steel
Brass
Stainless steel
Brass
1.4571
Brass
1.4571
Brass
1.4571
Brass
1.4571
1.4571
1.4571
1.4571
1.4571
none
none
none
none
±10% of FS
±10% of FS
BFS-10-O ½"
BFS-10-O ¼"
16 bar
16 bar
16 bar
16 bar
0.02 - 0.3 bar
0.02 - 0.2 bar
100 °C
100 °C
230 V - 3 A - 60 VA
200 V - 1 A - 20 VA
250 V - 1.5 A - 50 VA
200 V - 1 A - 20 VA
IP65
IP65
Brass
Stainless steel
Brass
Stainless steel
Brass
1.4571
Brass
1.4571
Brass
1.4571
Brass
1.4571
1.4571
1.4571
1.4571
1.4571
none
none
none
none
±10% of FS
±10% of FS
7
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