Input

Selectable filters to suppress the line frequency

50 Hz, 60 Hz, also 10 Hz for special applications (line frequency filter is similar with measuring frequency)

Resistance thermometer

Measured variable

Temperature

Measured range

Parameterizable

Measured span

Min. 25 °C (45 °F) x 1/scaling factor

Sensor type

• DIN IEC 751

Pt100 (DIN IEC 751)

• Acc. to JIS C 1604-81

Pt100 (JIS C1604-81)

• Acc. to DIN 43760

Ni100 (DIN 43760)

• Special type (R_RTD ≤ 500 Ω)

Multiples or parts of the defined characteristic values can be parameterized (e.g. Pt500, Ni120)

Voltage measurement

Temperature-linear, resistance-linear or customer-specific

Type of connection

• Normal connection
• Sum or parallel connection
• Mean-value or differential connection

Connection

2, 3 or 4-wire circuit

Measuring range limits

Depending on type of connected thermometer (defined range of resistance thermometer)

Sensor breakage monitoring

Monitoring of all connections for open-circuit (function can be switched off)

Sensor short-circuit monitoring

Parameterizable response threshold (function can be switched off)

Resistance-based sensors, potentiometers

Measured variable

Ohmic impedance

Measured range

Parameterizable

Measured span

Min. 10 Ω

Voltage measurement

Resistance-linear or customer-specific

Type of connection

• Normal connection
• Differential connection
• Mean-value connection

Connection

2, 3 or 4-wire circuit

Input range

0 ... 6000 Ω;

with mean-value and difference circuits: 0 ... 3000 Ω

Sensor breakage monitoring

Monitoring of all connections for open-circuit (function can be switched off)

Sensor short-circuit monitoring

Parameterizable response threshold (function can be switched off)

Thermocouple elements

Measured variable

Temperature

Measured range

Parameterizable

Measured span

Min. 50 °C (32.22 °C) x 1/scaling factor

Measuring range limits

Depend. on type of thermocouple element

Thermocouple

Type B: Pt30 %Rh/Pt6 %Rh (DIN IEC 584)

Type C W5 %-Re (ASTM 988)

Type D W3 %-Re (ASTM 988)

Type E: NiCr/CuNi (DIN IEC 584)

Type J: Fe/CuNi (DIN IEC 584)

Type K: NiCr/Ni (DIN IEC 584)

Type L Fe-CuNi (DIN 43710)

Type N: NiCrSi-NiSi (DIN IEC 584)

Type R: Pt13 %Rh/Pt (DIN IEC 584)

Type S: Pt10 %Rh/Pt (DIN IEC 584)

Type T: Cu/CuNi (DIN IEC 584)

Type U: Cu/CuNi (DIN 43710)

Special type (-10 mV ≤ UTC ≤ 100 mV)

Voltage measurement

Temperature-linear, voltage-linear or customer-specific

Type of connection

• Normal connection
• Sum connection
• Mean-value connection
• Differential connection

Cold junction compensation

None, internal measurement, external measurement or predefined fixed value

Sensor breakage monitoring

Function can be switched off

mV sensors

Measured variable

DC voltage

Measured range

Parameterizable

Measured span

Min. 4 mV

Input range

-120 ... +1000mV

Voltage measurement

Voltage-linear or customer-specific

Overload capacity of inputs

Max. ± 3.5 V

Input resistance

≥ 1 Ω

Sensor current

Approx. 180 μA

Sensor breakage monitoring

Function can be switched off

V sources

Measured variable

DC voltage

Measured range

Parameterizable

Voltage measurement

Voltage-linear or customer-specific

Input range/min. span

• Devices with 7NG3242-xxxx1or 7NG3242-xxxx 0 with U/I plug

-1.2 V ... +10 V 0.04 V

• Devices with 7NG3242-xxxx2

-12 V ... +100 V 0.4 V

• Devices with 7NG3242-xxxx3

-120 V ... +140 V 4.0 V

Sensor breakage monitoring

Not possible

μA, mA sources

Measured variable

DC voltage

Measured range

Parameterizable

Voltage measurement

Current-linear or customer- specific

Input range/min. span

• Devices with 7NG3242-xxxx4

-12 μA ... +100 μA/0.4 μA

• Devices with 7NG3242-xxxx5

-120 μA ... +1000 μA/4 μA

• Devices with 7NG3242-xxxx6

-1.2 mA ... +10 mA 0.04 mA

• Devices with 7NG3242-xxxx7or 7NG3242-xxxx 0 with U/I plug

-12 mA ... +100 mA 0.4 mA

• Devices with 7NG3242-xxxx8

-120 mA ... +1000 mA 4 mA

Sensor breakage monitoring

Not possible

Output

Output signal

Load-independent direct current 0/4 ... 20 mA, can be switched to load-independent DC voltage 0/2 ... 10 V using plug-in jumpers.

Current 0/4 ... 20 mA

• Overrange

-0.5 ... +23.0 mA, continuously adjustable

• Output range following sensor fault

-0.5 ... +23.0 mA, continuously adjustable

• Load

≤ 650 Ω

• Open-circuit voltage

≤ 30 V

Voltage 0/2 ... 10 V

• Overrange

-0.25 ... +10.75 V, continuously adjustable

• Output range following sensor fault

-0.25 ... +10.75 V, continuously adjustable

• Load resistance

≥ 1 kΩ

• Load capacitance

≤ 10 nF

• Short-circuit voltage

≤ 100 mA (not permanently short-circuit-proof)

• Electrical damping

• Adjustable time constant T₆₃

0 ... 100 s, in steps of 0.1 s

• Current source/voltage source

Continuously adjustable within the total operating range

Sensor fault/limit signalling

By operation indicator, relay output or HART interface

Operation indicator

Flashing signal

• Limit violation

Flashing frequency 5 Hz

• Overrange

Flashing frequency 1 Hz

Relay output

Either as NO or NC contact with 1 changeover contact

• Switching capacity

≤ 150 W, ≤ 625 VA

• Switching voltage

≤ 125 V DC, ≤ 250 V AC

• Switching current

≤ DC 2.5 A

Overrange

Signalling of sensor or line breakage and sensor short-circuit

Limit monitoring

• Operating delay

0 ... 10 s

• Monitoring functions of limit module

• Sensor fault (breakage and/or short-circuit)
• Lower and upper limit
• Window (combination of lower and upper limits)
• Limit and sensor fault detection can be combined

• Hysteresis

Parameterizable between 0 and 100 % of measuring range

Power supply

Universal power supply unit

115/230 V AC/DC or 24 V AC/DC

Tolerance range for power supply

• With 115/230 V AC/DC PSU

80 ... 300 V DC; 90 ... 250 V AC

• With 24 V AC/DC PSU

18 ... 80 V DC; 20.4 ... 55.2 V AC (in each case interruption-resistant up to 20 ms in the complete tolerance range)

Tolerance range for mains frequency

47 ... 63 Hz

Power consumption with

• 230 V AC

≤ 5 VA

• 230 V DC

≤ 5 W

• 24 V AC

≤ 5 VA

• 24 V DC

≤ 5 W

Electrical isolation

Electrically isolated circuits

Input, output, power supply and sensor fault/limit monitoring output are electrically isolated from one another. The HART interface is electrically connected to the output.

Working voltage between all electrically isolated circuits

The voltage U _eff between any two terminals must not exceed 300 V

Measuring accuracy

Measurement error

• Error in the internal cold junction

≤ 3 °C ± 0,1 °C/10 °C (≤ 5.4 °F ± 0,18  °F/18 °F)

• Error of external cold junction terminal 7NG3092-8AV

≤ 0.5 °C ± 0,1 °C/10 °C (≤ 0.9 °F ± 0.18 °F/18 °F)

• Digital output

See "Digital error"

• Analog output I_AN or U_AN

≤ 0.05 % of span in addition to digital error

Influencing effects (referred to the digital output)

Compared to the max. span:

• Temperature drift

≤ 0.08 %/10 °C (≤ 0.08 %/18 °F)

≤ 0.2 % in the range -10 ... +60 °C (14 ... 140 °F)

• Long-term drift

≤ 0.1 %/year

Influencing effects referred to the analog output I_AN or U_AN

Compared to the span:

• Temperature drift

≤ 0.08 %/10°C (≤ 0.08 %/18 °F)

≤ 0.2 % in the range -10 ... +60 °C (14 ... 140 °F)

• Power supply

≤ 0.05 %/10 V

• Load with current output

≤ 0.05 % with change from 50 ... 650 Ω

• Load with voltage output

≤ 0.1 % with change in load current from 0 … 10 mA

• Long-term drift (start-of-scale value, span)

≤ 0.03 %/month

Response time (T₆₃without electrical damping)

≤ 0.2 s

Electromagnetic compatibility

According to EN 61 326 and NAMUR NE21

Certificate and approvals

ATEX

To DIN EN 50014: 1997, EN 50020: 1994

Intrinsic safety to EN 50 020

• for 7NG3242-xAxxx

II (1) G D [EEx ia/ib ] IIB

• for 7NG3242-xBxxx

II (1) G D [EEx ia/ib ] IIC

EC-Type Examination Certificate

TÜV (German Technical Inspectorate) 01 ATEX 1675

Rated conditions

Installation conditions

Location (for devices with explosion protection)

• Transmitters

Outside the potentially explosive atmosphere

• Sensor

Within the potentially explosive atmosphere zone 1 (also in zone 0 in conjunction with the prescribed protection requirements for the sensor)

Ambient conditions

Permissible ambient temperature

-25 ... +70 °C (-13 ... +158 °F)

Permissible storage temperature

-40 ... +85 °C (-40 ... +185 °F)

Climatic class

• Relative humidity

5 ... 95 %, no condensation

Design

Weight

Approx. 0.24 kg (0.53 lb)

Enclosure material

PBT, glass-fibre reinforced

Degree of protection to IEC 529

IP20

Degree of protection to VDE 0100

Protection class I

Type of installation

35-mm top hat rail (1.38 inch) (DIN EN 50022) or 32-mm G-type rail (1.26 inch) (DIN EN 50035)

Electrical connection / process connection

Screw plug connectors, max. 2.5 mm² (0.01 inch²)

Parameterization interface

Protocol

HART, version 5.9

Load with connection of

• HART communicator

230 ... 650 Ω

• HART modem

230 ... 500 Ω

Software for PC/laptop

SIMATIC PDM version V5.1 and later

mV sources (linear)

-1  ... +16

35

-3 ... +32

20

-7 ... +65

20

-15 ... +131

50

-31 ... +262

100

-63 ... +525

200

-120 ... +1000

300

Measuring range V

Digital error mV

V sources (linear)

-1,2 ... +10

3

-12 ... +100

30

-120 ... +140

300

Measuring range μA/mA

Digital error μA

μA/mA sources (linear)

-12 ... 100 Î¼A

0,05

-120 ... +1000 Î¼A

0,5

-1,2 ... +10 mA

5

-12 ... +100 mA

50

-120 ... +1000 mA

500