Float switch with switching contacts and temperature contact, with resistance measuring chain / resistance thermometer, with display and control unit ABZMS-41

Description

Product description

Float switches are switching devices operated by a float moved by fluid. These are used to control fluid levels in power unit tanks.

Three series are available:

• Float switches typeABZMS…M with a maximum of four adjustable switching contacts normally closed contact/ normally open contact or a maximum of three switching contacts and optionally fixedly set temperature contact as normally closed contact for 60 °C, 70 °C or 80 °C

• Float switches type ABZMS…RTA with resistance measuring chain (level) and resistance thermometer (temperature) with analog output from 4 to 20 mA.

• Float switches type ABZMS…D with resistance measuring chain and resistance thermometer as with type ABZMS...RTA and additional display and control unit for level and temperature setting.

Level function

Level contacts:

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

If with decreasing oil level, the float reaches the switching points, the contacts are magnetically operated. The spool positions of the contacts are maintained until the float passes the switching points once again due to the increasing oil level.

The switching points can be adjusted in the device.

Rotating the contacts by 180° changes the switching function; the normally closed contact type becomes a normally open contact or vice versa.

Resistance measuring chain:

The sliding tube contains the resistance measuring chain (contact distance 5 mm / resolution) for the continuous recording of the filling level height. If the individual reed contact is switched (closed) by the permanent magnet located in the float, a resistance will in each case be activated.

The added resistance value is converted by a transformer into 4 … 20 mA.

Temperature function

Temperature contact:

At the lowest point within the sliding tube, the bi-metal temperature contacts are attached to the circuit board and secured by means of a shrinkable tubing (the same procedure is used with the versions with PT 100 temperature sensor and resistance thermometer with analog output 4 … 20 mA). If the desired temperature switching point is reached, the bi-metal contact is opened or closed.

Temperature sensor PT100:

The PT100 consists of a temperature sensor guaranteeing continuous temperature recording. In this connection, the max. cable length of [si]6 m[/si][mp]236 in[/imp] is to be observed.

Resistance thermometer with measuring transducer, output 4 … 20 mA:

The PT100 resistance thermometer with measuring transducer is also attached to the circuit board in the sliding tube. The temperature-dependent signal is converted into a linear current change from 4 … 20 mA.

Display and control unit function (version D)

The micro-processor controlled display and control unit processes the analog input signals for the analysis of the level and temperature control. Level and temperature can be set at the control unit in an easy menu navigation by means of pushbuttons and the settings can be read off at the LED display.

The display and control unit has a four-digit, red seven-segment LED display and 3 pushbuttons for the operation as well as up to 4 LEDs integrated in the front plate for the display of alarm conditions.

Apart from that, the device has four freely adjustable PNP switching outputs plus the adjustable switch-back points (version D1) and alternatively (version D2) two freely programmable PNP switching outputs and 2 x 4 … 20 mA output for the continuous measurement of oil level and temperature. The switching conditions are shown in the display.

The output 4 … 20 mA can optionally be set to 0 … 10 V, 2 … 10 V or 0 … 5 V.

Depending on the setting, the display shows the measured temperature or filling level value in the desired unit (°C, °F, L, cm, %, inch or mm). By default, the temperature display is set to °C.

During the setting and/or programming of the corresponding process parameters, the parameter values and/or the related menu items are shown in the display.

In case of energy supply failure, all input values will be stored, the max/min values can be called from a permanent memory, if necessary.

Parameterization

The menu navigation is based on the VDMA standard sheet for fluid sensors 24574-1.

The operating menu is designed hierarchically as tree structure.

That means that frequently used functions and adjustment points are quickly accessible and rarely used menu items can be found in a submenu.

Using the ▲ and ▼ keys, the corresponding parameters are set and/or the next menu item is displayed.

Using the ► key, the selected menu item is selected and/or the set parameter is accepted and stored.

The parameter may be a numerical value and a selection of functions (e.g. NO [output as normally open contact], NC [output as normally closed contact] or i1 [analog output 4 … 20 mA]).

After confirmation of a parameter or function selection by means of the ► key, the display will switch back to the current menu item. Then, you can use ▲ and ▼ to display the next menu item and ► to select it.

Type code

Ordering code

Technical data

Resistance

electrical

Reed contacts of the float switches
with connection K24, K14, K6/DC

Temperature contacts of the float switches
with connection K24, K14, K6/DC

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

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

Temperature sensor Pt100

Resistance measuring chain and resistance thermometer
with connection K24 for mating connector M12 x 1; 4-pole

Display and control unit

Symbols/Circuit diagrams

With two switching contacts

With two switching contacts and one temperature contact

With resistance measuring chain/resistance thermometer

With display and control unit, resistance measuring chain/resistance thermometer

Electrical connection

Connection versions and pin assignment

By default, the switching point L1 is set as normally closed contact and switching points L2 to L4 as normally open contact. The switching points can be adjusted in the device.

Rotating the contacts by 180° changes the switching function; the normally closed contact type becomes a normally open contact or vice versa.

Dimensions

Pre-set switching points Type M

Dimensions:

Float switch with level and temperature contacts (version M - T..F)

Float switch with resistance measuring chain and resistance thermometer (version RTA)

Dimensions in mm

Dimensions: Float switch with display and control unit (version D..)

Dimensions in mm

Oil volume specification for float switch

Type M with two switching contacts

Attention!

Before the commissioning, the switching contacts are to be set according to the necessary operating conditions.

Adjustment of the switching height

The contacts installed in the float switch are screwed to a contact strip within the sliding tube. They are set to the switching points according to the preceding table and can be adjusted to higher or lower values retroactively (observe minimum distances!). For adjusting the contacts, proceed as follows:

• Interrupt the voltage supply

• Loosen the plug-in connection

• Loosen the screws of the connector base and pull out the connector base with the contact strip

• Loosen the contact from the strip and fasten it at the desired position (it can be adjusted in steps of 10 mm)

• Carefully insert the contact strip

• Fasten the connector base by means of the screws

• Re-establish the plug-in connection and the power connection

Type RTA, D1 and D2

in tank according to AB 40-40, AB 40-43 and AB 40-44

Tank size DN100 to 800
Dimensions in mm

Tank size DN1000 to 2000
Dimensions in mm

Installation opening of the tank cover

Dimensions in mm

Standard breakthrough AB 03-39.73 similar to DIN 24557 part 2

Fastening screws:

6 HEXAGONSOCKET HEAD CAP SCREWS ISO4762-M5X18-8.8-A2P; Material no. R900202612

Mounting

Assembly information

• Vertical installation according to technical data (see "Technical Data")

• Avoid flows

• Do not expose the switch to strong impact and bends

• Avoid external magnetic fields. They may impair the function of the reed contacts.

Electrical connections:

• Electrical connections may only be performed by specialists

• Before performing any works at electrical parts, the voltage supply is to be interrupted

• Tighten round connector M12 x 1 or mating connectors after connection

• Only plug in the round connector M12 x 1 or mating connector if it is de-energized

• Do not overload the contacts (see technical data)

• In case of inductive load, provide for a protective circuit!

Information

Normative reference

AB 24-02

Cable sets and distributors

AB 40-40

Tank made of steel, form AN, cover form C, oil pan according to WHG

AB 40-43

Tank made of steel, cover form C

AB 40-44

Tank made of steel, with frame

R.08006

Mating connectors for controlling electric valves and sensors

DIN 24320

Flame-resistant fluids - Hydraulic fluids of categories HFAE and HFAS - Properties and requirements

DIN 51524

Hydraulic fluids; hydraulic oils

DIN EN 175201-804

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

DIN EN 175301-803

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

DIN EN 60751

Industrial platinum resistance thermometers and platinum temperature sensors (IEC 60751:2008)

DIN EN 60529

Protection classes by housing

VDMA 24317

Fluid technology – Flame-resistant fluids – Technical minimum requirements

VDMA 24568

Fluid technology – Fast bio-degradable fluids – Technical minimum requirements

VDMA 24574-1

Fluid technology – Terms, menu navigation and electrical connection for fluid sensors

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 explosive areas according to directive 94/9/EC (ATEX)

The float switches ABZMS-41 are not suitable for the use in explosive areas.

Downloads

	Float switch with switching contacts and temperature contact, with resistance measuring chain / resistance thermometer, with display and control unit Data Sheet | RE50222 | 2010-05-01 | English | PDF | 513k Product Groups: Power units Type ABZMS-41
	Float switch, Type ABZMS-41 Manual | RE50222-B | 2012-03-31 | English | PDF | 7MB Product Groups: Power units