Float switch with two switching contacts and one temperature contact ABZMS-35

Description

Product description

Float switches are switching devices operated by a float moved by fluid. They are used to control the tank fluid levels in small power units type ABSKG ... NG10; 20; 40 and 60.

The sliding tubes contain two fixedly set reed contacts (normally closed contact and normally open contact) that are switched by the permanent magnets installed in the float.

Fixedly set temperature contacts (option) are fitted to monitor the max. hydraulic fluid temperature.

Function of level switch

When the float reaches the switching points while the oil level is falling, the contacts are operated magnetically. The switching positions of the contacts are maintained until the float passes the switching points again due to a rising oil level.

Switching point L1 is a normally closed contact, the contact function of switching point L2 is optionally a normally closed or normally open contact.

Level switch function

When the float reaches the switching points while the oil level is falling, the contacts are operated magnetically. The switching positions of the contacts are maintained until the float passes the switching points again due to a rising oil level.

Switching point L1 is a normally closed contact, the contact function of switching point L2 is optionally a normally closed or normally open contact.

Temperature contact function

A bimetal plate, which is influenced by temperature, switches when a firmly set response temperature is reached. The temperature contact is not suitable for temperature controlling, but merely for a shutdown function.

Type code

Ordering code

Technical data

Resistance

electrical

Reed contacts of the float switches
with connection K24 for mating connector M12 x 1; 4-pole

Temperature contacts of the float switches
with connection K24 for mating connector M12 x 1; 4-pole

Reed contacts of the float switches
with connection K14 according to DIN EN 175301-803 / K6 according to DIN EN 175201-804

Temperature contacts of the float switches
with connection K14 according to DIN EN 175301-803 / K6 according to DIN EN 175201-804

For inductive and capacitive loads, protection circuits are to be provided (diode, RC element, varistor).

Assignment to reservoirs

Float switches with min./max. switching points

Tank size DN10 and 20 Dimensions in mm	Tank size DN40 and 60 Dimensions in mm

Float switches with min. early warning switching points

Tank size DN10 and 20 Dimensions in mm	Tank size DN40 and 60 Dimensions in mm

Symbols/Circuit diagrams

With two switching contacts

With two switching contacts and one temperature contact

Dimensions

Dimensions: Float switches with two switching contacts

Plug-in connection M12 x 1, max. 50 VDC
Dimensions in mm

Plug-in connection DIN EN 175301-803, max. 230 VAC
Dimensions in mm

Pinout

Switching function with plug-in connection M12 x 1
Switching function with plug-in connection DIN EN 175301-803
L1 =	Normally closed contact at min.
L2 =	Normally closed or normally open contact as early warning

Dimensions: Float switches with two switching contacts and temperature contact

Plug-in connection M12 x 1, max. 50 VDC
Dimensions in mm

Plug-in connection DIN EN 175201-804, max. 230 VAC
Dimensions in mm

Pinout

Switching function with plug-in connection M12 x 1
Switching function with plug-in connection DIN EN 175201-804
L1 =	Normally closed contact at min.
L2 =	Normally closed or normally open contact as early warning
ϑ =	Normally closed contact at max. temperature

Mounting

Installation information

• Vertical installation according to technical data (see “Technical data”)

• Avoid flows

• Do not expose the switch to heavy impacts and bends

• Avoid external magnetic fields. Thus, the function of the reed contacts may be impaired.

Electrical connections:

• Electrical connections may only be established by specialists

• Tighten the round connectors M12 x 1 and/or mating connectors after connection

• Only plug in the round connectors M12 x 1 and/or mating connectors in the de-energized condition

• Do not overload the contacts (see “Technical data”)

• In case of inductive load provide a protection circuit!

Information

Normative reference

DIN EN 50020

Electric operating equipment for potentially explosive atmospheres - Intrinsic safety “i”; German version EN 50020:2002

DIN EN 60079-0

Electric operating equipment for potentially explosive gas atmospheres - Part 0: General requirements (IEC 60079-0:2004); German version EN 60079-0:2004

DIN EN 60079-14

Electric operating equipment for potentially explosive gas atmospheres - Part 14: Electric systems for endangered areas (except for mining) (IEC 60079-14:2002); German version EN 60079-14:2003

DIN EN 175201-804

Detail specification - Circular connectors - Round contacts, size diameter 1.6 mm, threaded coupling; German version EN 175201-804:1999

DIN EN 175301-803

Detail specification: Rectangular connectors - Flat contacts, 0,8 mm thickness, locking screw not detachable; German version EN 175301-803:1999

Accessories

Mating connectors

Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard

4P Z14

Mating connectors for mechanical pressure switches with connector “K14”, without circuitry, standard

4P Z14

• For mechanical pressure switches with connector “K14”, according to EN 175301-803 and ISO 4400, 3-pole + PE, “large cubic connector”

• Data sheet

• Spare parts and repair

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1

4P Z24

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1

4P Z24

• For sensors and valves with connector “K24”, “K35” and “K72”
• Mating connectors M12, 4-pole, line cross-section 0.75 mm2

• Data sheet

• Spare parts and repair

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1, with assembled connection line

4P Z24 +

Mating connectors for sensors and valves with connector “K24”, “K35” and “K72”, M12 x 1, with assembled connection line

4P Z24 +

• For sensors and valves with connector “K24”, “K35” and “K72”
• Mating connectors M12, 4-pole, line cross-section 0.75 mm2

• Data sheet

• Spare parts and repair

Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6” and “DK6L”, 6-pole + PE

7P Z6

Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6” and “DK6L”, 6-pole + PE

7P Z6

• Mating connectors for mechanical position switches, mechanical pressure switches and valves with central connection with connector “K6”

• Data sheet

• Spare parts and repair

Safety Instructions

Use in potentially explosive atmospheres according to Directive 94/9/EC (ATEX)

According to DIN EN 50020 float switches are simple electrical apparatus, which are not provided with voltage sources.

The electrical components consist of reed contacts, bimetal thermostats, plug-in connections and terminals.

The equipment complies with construction regulations according to DIN EN 60079-0 and DIN EN 50020.

According to DIN EN 60079-14 these simple, electrical apparatus may be used in intrinsically safe electric circuits [EEx ib] in systems for equipment class II, category 2G (Zone 1) and category 3G (Zone 2) without marking and certification.

The apparatus are assigned to category ib and temperature class T6.

Intrinsically safe, electrical equipment in potentially explosive atmosphere (zone 1 and 2)		Associated electrical equipment in safe zone

Downloads

Float switch with two switching contacts and one temperature contact Data Sheet | RE50212 | 2007-04-01 | English | PDF | 238k Product Groups: Power units