Endress Hauser FTS20 Liquifloat Point Level Switch Instruction Manual

Endress Hauser FTS20 Liquifloat Point Level Switch Instruction Manual

Safety instructions

The FTS20 floating switch may only be used as a level limit switch in suitable liquids. Improper use may cause dangerous situations. The instrument may only be installed, connected and commissioned by qualified and authorised personnel, paying particular attention to:

• this compact manual
• the appropriate standards
• the statutory regulations and
• certificates (depending on version and application)

Safety symbols

Warning!
“Warning” indicates an action or procedure which, if not performed correctly, can result in injury or a safety hazard. Read the instructions thoroughly and proceed carefully.

Note!
“Note” indicates processes which – if improperly executed – could affect operation or trigger unexpected instrument actions.

Instrument variants

hazardous areas 2-wire to EN 60947-5-2 (NAMUR)Use with isolating amplifier; ATEX II 2 G Ex ia IIB T5 Gb
5201011971035516| 5 m20 m| With PVC cable material (black)
5201012071035517| 5 m20 m| With PUR cable material (gray)
5201012171035518| 5 m20 m| With CSM cable material (black)
Warning!NAMUR device versions: if using accessories in hazardous areas, their use must be assessed by the user.
| | |
A  C  /  D  C| | Microswitch with switching ball for standard application,3-wire, change-over contact for max. 250 V AC / 150 V DC
5201012271035520| 5 m20 m|
5201012371035521| 5 m20 m|
5201012471035522| 5 m20 m|
Accessories|
Nivotester FTL325N| Isolating amplifier
52010125| Compression gland G1A, PVC
52010126| Counter nut G1A, PVC
52010127| Weight (coated with polyamide) **** Warning! The weight No. 52010127 may not be used in hazardous areas.

Function

An element built into the floating switch switches when a deviation in the horizontal is detected. The switching process is triggered by the movement of a steel ball and, depending on the version, is carried out by an inductive initiator or a microswitch. The inductive initiator acts as a switching output and provides a switching signal to EN 60947-5-2 (NAMUR). The microswitch version is a two-way switch.

Features

• Reliable level limit detection in liquids
• Electrical connections to NAMUR for hazardous areas (to Zone 1) or change-over contact (AC/DC) for universal standard application
• Different cable materials for different media
• Small diameter for simple installation using tapped hole G1A

Applications

Controlling pumps and valves with one switch or signal level height or limit

Installation

The floating switch can be installed as follows:

• The floating switch can be inserted into the tank – through a tapped hole G1A – and screwed to the compression gland (G1A).
• If it is installed from above, use the weight.

Note!

• The fulcrum of the cable should always be horizontal.
• The cable length between the fixture and the floating body is dependent on the cable type (see “Technical data”).
• When using the weight, place an extra strain relief (e.g. a knot in the cable) behind the compression gland – on the outside of the tank.

Electrical connection

Warning!
Note the switch type!

Inductive proximity switch with switching ball (NAMUR) Order codes: 52010119, 5201012052010121, 7103551671035517, 71035518| | Connection indication L+ = black or brownL- = blue(closing when floating)
---|---|---
Change-over contact (AC/DC) Order codes: 52010122, 5201012352010124, 7103552071035521, 71035522| | Cable colours:black + brown = contact open blak

• blue = contact closed (contact position when floating)

Technical data FTS20 (NAMUR)

Measuring system| Comprising an FTS20 floating switch and an isolating amplifier, e.g.Endress+Hauser Nivotester FTL325N
---|---
Switching element| Inductive proximity switch with switching ball, closed when floating
Power supply| 8.2 V ±2 V
Operating current| <1.2 mA unswitched; >2.1 mA switched
Reverse polarity protection| Yes
Switching angle| Switching points: top +15° ±5°, bottom +15° ±5°, measured to the horizontal
Process temperature range| Dependent on cable material: PVC and PUR: +5…+70 °C, CSM: –20…+70 °C
Ingress protection| DIN EN 60529, IP68 (immension depth: 20 m / without temporal limit)
Process pressure| £ 3 bar at 20 °C
Density of liquid| ³ 0.8 g/cm3
Floating body material| Polypropylene (PP)
Cable material| PVC, CSM: standard length 5 m and 20 m, cross section 2 x 0.75 mm2 PUR: standard length 5m and 20 m, cross section 2 x 0.50 mm2
Minimum cable length between fixing and floating body| PVC: ³ 50 mmPUR: ³ 100 mm CSM: ³ 100 mm
Ex approval| TÜV 99 ATEX 1709
Ex ingress protection| 0 II 2G Ex ia IIB T5 Gb
Temperature class Ambient temperature Voltage CiCurrent Ii Power Pi Inductance Li Capacitance Ci| T4-20 °C…+70 °C16 V72 mA242 mW1 mH153 nF| T5-20 °C…+40 °C16 V72 mA242 mW1 mH153 nF| T5-20 °C…+55 °C16 V52 mA208 mW1 mH153 nF| T5-20 °C…+70 °C16 V52 mA180 mW1 mH153 nF
Standards| EN 60947-5-2:2007 +A1:2012; EN 60079-0:2012 + A11:2013; EN 60079-11:2012

Technical data FTS20 (AC/DC)

±10°, measured to the horizontal
Process temperature range| Dependent on cable material:PVC and PUR: +5…+70 °C, CSM: –20…+70 °C
Ingress protection| DIN EN 60529, IP68 (immension depth: 20 m / without temporal limit)
Process pressure| £ 3 bar at 20 °C
Density of liquid| ³ 0.8 g/cm3
Floating body material| Polypropylene (PP)
Cable material| PVC, CSM: standard length 5 m and 20 m, cross section 3 x 0.75 mm2 PUR: standard length 5m and 20 m, cross section 3 x 0.50 mm2
Minimum cable length between fixing and floating body| PVC: ³ 50 mm PUR: ³ 100 mm CSM: ³ 100 mm

Dimensions

FTS20 floating switch

Compression gland weight

Weight

(Dimensions in mm)

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