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.
7 Technical Data
Operating data BFS-10-N 1" BFS-10-N ½" BFS-10-N ¼"
Pressure MS 250 bar 300 bar 300 bar
Pressure MS with GL 100 bar 100 bar 100 bar
Pressure VA 300 bar 350 bar 350 bar
Pressure drop 0.02 - 0.4 bar 0.02 - 0.3 bar 0.02 - 0.2 bar
Temperature max. 100 °C 100 °C1) 100 °C
Electrical data – only valid for application in non-explosive atmosphere
Normally Open NO 250 V - 3 A - 100 VA 230 V - 3 A - 60 VA 200 V - 1 A - 20 VA
Change over* 250 V - 1.5 A - 50 VA 250 V - 1.5 A - 50 VA 200 V - 1 A - 20 VA
System of protection IP65 IP65 IP65
Materials Brass Stainless steel Brass Stainless steel Brass Stainless steel
Housing Brass 1.4571 Brass 1.4571 Brass 1.4571
Float Brass 1.4571 Brass 1.4571 Brass 1.4571
Spring 1.4571 1.4571 1.4571 1.4571 1.4571 1.4571
Seals none none none none none none
Tolerance ±10% of FS ±10% of FS ±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" BFS-10-O ½" BFS-10-O ¼"
Pressure MS 10 bar 16 bar 16 bar
Pressure VA 10 bar 16 bar 16 bar
Pressure drop 0.02 - 0.4 bar 0.02 - 0.3 bar 0.02 - 0.2 bar
Temperature max. 100 °C 100 °C 100 °C
Electrical data – only valid for application in non-explosive atmosphere
Normally Open NO 250 V - 3 A - 100 VA 230 V - 3 A - 60 VA 200 V - 1 A - 20 VA
Change over* 250 V - 1.5 A - 50 VA 250 V - 1.5 A - 50 VA 200 V - 1 A - 20 VA
System of protection IP65 IP65 IP65
Materials Brass Stainless steel Brass Stainless steel Brass Stainless steel
Housing Aluminum
anodized
1.4571 Brass 1.4571 Brass 1.4571
Float Brass 1.4571 Brass 1.4571 Brass 1.4571
Spring 1.4571 1.4571 1.4571 1.4571 1.4571 1.4571
Seals none none none none none none
Tolerance ±10% of FS ±10% of FS ±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)
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