NAMUR isolating amplifier

NAMUR isolating amplifier

Nivotester FTL325N

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    • NAMUR interface IEC EN 60947-5-6

    • One- to three-channel version

    • Two-point control and point level detection with vibronic point level switch Liquiphant M/S, Soliphant M, Solicap M/S, Liquicap M and Liquipoint

     

    Specs at a glance

    Function Isolating amplifier
    Approval ATEX II (1) GD EEx ia
    CSA IS Cl. I, II, III Div.1 Gr.A-G,
    NI Cl.I Div.2
    FM IS Cl. I, II, III Div.1 Gr.A-G
    Connectable sensors All NAMUR switches
    Output 1 relay per channel
    Number of channels 1 or 3

    FTL325N

    Product / VersionPrice / pcs. in USDOrder code
    ApprovalPower SupplySwitch Output1 to 34 to 1011+
    ATEX II (1)GD [EEx ia] IIC, WHG, IECEx [Ex ia] IIC85-253VAC1x SPDT level + 1x SPST alarm151.-141.-133.- FTL325N-F1A1
    3x SPDT level + 1x SPST alarm257.-239.-226.- FTL325N-F3A3
    20-30VAC/20-60VDC1x SPDT level + 1x SPST alarm151.-141.-133.- FTL325N-F1E1
    3x SPDT level + 1x SPST alarm257.-239.-226.- FTL325N-F3E3
    CSA85-253VAC1x SPDT level + 1x SPST alarm151.-141.-133.- FTL325N-x1A1
    3x SPDT level + 1x SPST alarm257.-239.-226.- FTL325N-x3A3
    20-30VAC/20-60VDC1x SPDT level + 1x SPST alarm151.-141.-133.- FTL325N-x1E1
    3x SPDT level + 1x SPST alarm257.-239.-226.- FTL325N-x3E3
    FM85-253VAC1x SPDT level + 1x SPST alarm146.-136.-128.- FTL325N-x1A1
    3x SPDT level + 1x SPST alarm252.-234.-222.- FTL325N-x3A3
    20-30VAC/20-60VDC1x SPDT level + 1x SPST alarm146.-136.-128.- FTL325N-x1E1
    3x SPDT level + 1x SPST alarm252.-234.-222.- FTL325N-x3E3

    Accessories

    Product / VersionPrice / pcs. in USDOrder code
    Housing Field, R4 182x180x165, 5xM20, PC Protection housing Minitec. Synthetic housing with transparent cover. Protection IP66. 4x22.5mm / 2x45mm.115.33 52010132

    Prices valid until 31.08.2017 in USD per unit (not including shipping and applicable sales tax). See
    Endress+Hauser Terms and Conditions

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  • Application

    The isolating amplifier Nivotester isolates and amplifies signals coming from hazardous areas. Proximity switches, vibronic point level switches or mechanic contacts can be used as measuring sensors. Isolating amplifiers can be used for the transmission of the switch status or for limit detection. Two-point control is possible in a liquid tank using the three-channel version. Combined with a Liquiphant M or Liquiphant S the isolating amplifiers are approved as overspill protection according to WHG. For using FTL325N in field a protection housing is available.

    Function

    The isolating amplifiers supply voltage to the measuring sensors via a two-wire loop. The switching status of the sensors is evaluated and put out via a relay. By using the quiescent-current-principle this ensures a high operational safety. At the same time, a control current is transferred along this supply line.

    Combined with a vibronic point level switch Liquiphant M/S and Soliphant M the measuring line is controlled of short-cut, supply fails also the vibration fork of corrosion.

    Application Example

    NAMUR Isolating amplifier - FTL325N - Application example

    When channels CH2 and CH3 are used for two-point control Δs, the measuring device consists of:

    • 2 measuring sensors
    • 3-channel Nivotester
    • control or signal devices
  • Technical data

    Input
    Measured variable The limit signal can be triggered at minimum or maximum height as required
    Measuring range The measuring range is dependent on the installation location of the sensors
    Input Galvanically isolated from power supply and output
    Protection type

    II(1)G [Ex ia Ga] IIC

    II(1)D [Ex ia Da] IIIC

    Connectable measuring sensors Liquiphant M, Liquiphant S, Soliphant M, Solicap M, Solicap S, Liquicap M; sensors specified to IEC/EN 60947-5-6; contact switches with an appropriate resistance circuit
    Connecting line two-wire, screening unnecessary
    Line resistance max. 25 Ω per wire
    Signal transmission Current signal on supply line
    Control current range <1.2 mA / >2.1 mA
    Line interruption monitoring <200 µA
    Short-circuit >6.1 mA (can be switched off)
    Output
    Relay output One potential-free switch contact for the level alarm per channel
    Quiescent current safety circuit MIN/MAX safety can be selected with DIL switch
    Switch delay approx. 0.5 s
    Switching power of the relay contacts

    U ~ max. 253 V

    I ~ max. 2 A

    P ~ max. 500 VA at cos φ ≥ 0.7

    U = max. 40 V

    I = max. 2 A

    P = max. 80 W

    Life at least 105 switching operations at maximum contact load
    Function displays LEDs for operation, level alarm and fault
    Power supply
    Supply voltage

    85 to 253 V AC, 50/60 Hz

    20 to 30 V AC, 20 to 60 V DC, max. 60 mA (1-channel), max. 113 mA (3-channel),

    permissible residual ripple within tolerance: Vpp = max. 2 V

    The Nivotester is equipped with reverse polarity protection.

    Power consumption

    AC:
    1-channel: max. 1.75 W
    3-channel: max. 2.75 W

    DC:
    1-channel: max. 1.2 W (at Vmin 20 V)
    3-channel: max. 2.25 W (at Vmin 20 V)

    Operating conditions
    Ambient temperature

    For single installation: –20 to +60 °C (–4 to +140 °F)

    for rail mounting without gaps: –20 to +50 °C (–4 to +122 °F)

    Storage temperature –20 to +85 °C (–4 to +185 °F) (preferably at +20 °C/+68 °F)
    Ingress Protection IP 20, IK06
    EMC Interference emission to EN 61326; Class A apparatus; interference immunity to EN 61326; Appendix A (Industry) and NAMUR Recommendation NE 21 (EMC)
    Materials
    Housing Polycarbonate
    Front cover PP polypropylene
    Fixing slide (for fixing to top-hat rail), Polyamide PA6
    Approvals
    Ex approval ATEX II(1)G [Ex ia Ga] IIC
    ATEX II(1)D [Ex i Da] IIIC
    CSA IS Cl. I, II, III Div.1 Gr.A-G, NI Cl.I Div.2
    FM IS Cl. I, II, III Div.1 Gr.A-G

    Dimensions (in mm)

    NAMUR Isolating amplifier - FTL325N - Dimensions
    Installation according to instruction manual

    Electrical connection

    1-channel version

    NAMUR Isolating amplifier - FTL325N - Connecting the 1 channel version

    Connection cross section max. 1 × 2.5 mm² or 2 × 1.5 mm²

     

    a) Sensor 1 (EEx ia)

    b) Limit value relay 1

    c) Power supply

    d) Alarm relay

    3-channel version

    NAMUR Isolating amplifier - FTL325N - Connecting the 3 channels version

    Connection cross section max. 1 × 2.5 mm² or 2 × 1.5 mm²

     

    a) Sensor 1 (EEx ia)

    b) Limit value relay 1

    c) Power supply

    d) Alarm relay

    e) Sensor 3 (EEx ia)

    f) Sensor 2 (EEx ia)

    g) Limit value relay 2

    h) Limit value relay 3

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