Siemens SITRANS TW 7NG3242 Betriebsanleitung Seite 118

Technical data
Thermocouples
Measured variable
Measuring range
Measuring span
Measuring range limits
Thermocouple element
Characteristic curve
Type of connection
Cold junction compensation
Sensor breakage monitoring
mV sensors
Measured variable
Measuring range
Measuring span
Input range
Characteristic curve
Overload capacity of inputs
Input resistance
Sensor current
Sensor breakage monitoring
V sources
Measured variable
Measuring range
Characteristic curve
Input range/min. span
• Devices with 7NG3242-xxxx1 or
7NG3242-xxxx0 with U/I plug
• Devices with 7NG3242-xxxx2
• Devices with 7NG3242-xxxx3
Sensor breakage monitoring
CAUTION: For devices with explosion protection the maximum permitted voltages and currents according to the
EC-Type-Examination Certificate have to be observed.
118
Temperature
Parameterizable
min. 50 °C (90 °F) x 1/scaling fac-
tor
Depend. on type of thermocouple
element
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 d UTC d 100 mV)
Temperature-linear, voltage-linear
or customer-specific
• Normal connection
• Averaging connection
• Mean-value connection
• Differential connection
None, internal measurement,
external measurement or pre-
defined fixed value
Function can be switched off
DC voltage
Parameterizable
min. 4 mV
-120 ... +1000mV
Voltage-linear or customer-spe-
cific
max. ± 3.5 V
t 1 M:
Approx. 180 PA
Function can be switched off
DC voltage
Parameterizable
Voltage-linear or customer-spe-
cific
-1.2 ... + 10 V/0.04 V
-12 ... +100 V/0.4 V
-120 ... +140 V/4.0 V
Not possible
PA-, mA sources
Measured variable
Measuring range
Characteristic curve
Input range/min. span
• Devices with 7NG3242-xxxx4
• Devices with 7NG3242-xxxx5
• Devices with 7NG3242-xxxx6
• Devices with 7NG3242-xxxx7 or
7NG3242-xxxx0 with U/I plug
• Devices with 7NG3242-xxxx8
Sensor breakage monitoring
Output
Output signal
Current 0/4 ... 20 mA
• Overrange
• Output range following sensor
fault (conforming to NE43)
• Load
• No-load voltage
Voltage 0/2 ... 10 V
• Overrange
• Output range following sensor
fault
• Load resistance
• Load capacitance
• Short-circuit current
• Electrical damping
- adjustable time constant
63
• Current source/voltage source
Sensor fault/limit signalling
Operation indicator
• Limit violation
• Sensor fault monitoring
Relay outputs
• Switching capacity
• Switching voltage
• Switching current
Sensor fault monitoring
Limit monitoring
• Operating delay
• Monitoring functions of limit
module
• Hysteresis
DC voltage
Parameterizable
Current-linear or customer-specific
-12 ... +100 PA/0.4 PA
-120 ... +1000 PA/4 PA
-1.2 ... +10 mA/0.04 mA
-12 ... +100 mA/0.4 mA
-120 ... +1000 mA/4 mA
Not possible
Load-independent direct current
0/4 ... 20 mA, can be switched to
load-independent DC voltage 0/2
... 10 V using plug-in jumpers
-0.5 ... +23.0 mA, continuously
adjustable
-0.5 ... +23.0 mA, continuously
adjustable
d 650 :
d 30 V
-0.25 ... +10.75 V, continuously
adjustable
-0.25 ... +10.75 V, continuously
adjustable
t 1 k:
d 10 nF
d 100 mA (not permanently short-
circuit-proof)
0 ... 100 s, in steps of 0.1 s
Continuously adjustable within
the total operating range
By operation indicator, relay out-
put or HART interface
Flashing signal
Flashing frequency 5 Hz
Flashing frequency 1 Hz
Either as NO or NC contact with
1 changeover contact
d 150 W, d 625 VA
d 125 V DC, d 250 V AC
d 2.5 A DC
Signalling of sensor or line break-
age and sensor short-circuit
0 ... 10 s
• 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
Parameterizable between 0 and
100 % of measuring range
SITRANS TW
A5E00054075-05