SITRANS TR420 (HART, UNIVERSAL) Overview

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SITRANS TR420 (HART, UNIVERSAL) Overview

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Thương hiệu: Siemens
Danh mục:

SITRANS TR420 (HART, universal)
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Giá:Liên hệ

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Overview

2‑wire rail transmitter with HART communications interface
Device for rail mounting
Universal input for virtually any type of temperature sensor
Connection of two independent input circuits for redundant operation (high input availability)
Input drift detection
Configurable via HART 7

Benefits

Compact design
Connection of two independent input circuits for redundant operation (high input availability)
Galvanic isolation
Test terminals for ammeter
Diagnostics LED (green/red)
Input monitoring wire break and short-circuit
Self-monitoring
Configuration status stored in EEPROM
Expanded diagnostic functions, such as slave pointer, operating hours counter, etc.
Special characteristic
Electromagnetic compatibility according to EN 61326 and NE21
SIL2/3 (with order note C20)

Application

SITRANS TR420 transmitters with two inputs can be used in all sectors. Their compact design enables simple mounting on standard DIN rails on-site in protective boxes or in control cabinets. The following sensors/signal sources can be connected over their universal input module:

2 resistance thermometers (2-wire, 3-wire, 4-wire connection)
2 thermocouples
2 linear resistors, potentiometer and DC voltage sources

The output signal is a load-independent direct current from 4 to 20 mA in accordance with the input characteristic, superimposed by the digital HART signal.

The dual input mode also supports drift detection of the inputs, whereby maintenance intervals can be more easily planned.

Transmitters of the "intrinsically safe or Zone 2 increased safety" type of protection can be installed in hazardous areas. The device meets the requirements of the EU Directive 2014/34/EU (ATEX), the FM and CSA regulations as well as other national approvals.

Function

The SITRANS TR420 is configured via HART. The configuration can be carried out using a handheld communicator or, more conveniently, with a HART modem and the SIMATIC PDM configuration software. The configuration data are then permanently stored in the non-volatile memory (EEPROM).

After correct connection of input and supply voltage, the transmitter outputs a temperature-linear output signal and the diagnostics LED is green. In case of external errors, e.g. sensor short circuit or interruption, the LED flashes red; an internal error is indicated by a permanent red light.

An ammeter can be connected at any time for checking and plausibility via the test terminals. The output current can be read without any interruption, or even without opening the current loop.

SITRANS TR420, function block diagram

Technical specifications

SITRANS TR420 (HART, universal)
General
Supply voltage^{1) 2)}
Without explosion protection (non-Ex)	7.5 ... 48 V DC
With explosion protection (Ex i)	7.5 ... 30 V DC
Additional minimum supply voltage when using test terminals	0.8 V
Maximum power loss	≤ 850 mW
Minimum load resistance at supply voltage > 37 V	(V_supply - 37 V)/23 mA
Insulation voltage, test/operation
Without explosion protection (non-Ex)	2.5 kV AC/55 V AC
With explosion protection (Ex i)	2.5 kV AC/42 V AC
Polarity protection	All inputs and outputs
Write protection	Wire jumpers or software
Warm-up time	< 5 min
Starting time	< 2.75 s
Programming	SIPROM T and HART
Signal-to-noise ratio	> 60 dB
Long-term stability	Better than: ± 0.05% of measuring span/year ± 0.18% of measuring span/5 years
Response time	≤ 75 ms (typically 70 ms)
Programmable damping	0 ... 60 s
Signal dynamic
Input	24 bit
Output	18 bit
Influence of change in supply voltage	< 0.005% of measuring span/V DC
Input
Resistance thermometer (RTD)
Input type
Pt10 ... 10000	IEC 60751 JIS C 1604‑8 GOST 6651_2009 Callendar-Van Dusen
Ni10 ... 10000	DIN 43760-1987 GOST 6651-2009/OIML R84:2003
Cu5 ... 1000	Edison Copper Winding No. 15 GOST 6651‑2009/OIML R84:2003
Connection type	2-wire, 3-wire or 4-wire
Wire resistance per wire	Max. 50 Ω
Input current	< 0.15 mA
Effect of the wire resistance (with 3-wire and 4-wire connections)	< 0.002 Ω/Ω
Cable, wire-wire capacity
Pt1000, Pt10000 (IEC 60751 and JIS C 1604‑8)	Max. 30 nF
All other input types	Max. 50 nF
Fault detection, programmable	None, short-circuited, defective, short-circuited or defective Note When the low limit for the configured input type is below the constant detection limit for short-circuited inputs, the detection of short circuits is disabled regardless of the configuration of the fault detection.
Detection limit for short-circuited input	15 Ω
Fault detection time (RTD)	≤ 75 ms (typically 70 ms)
Fault detection time (for 3-wire and 4-wire)	≤ 2 000 ms
Thermocouples (TC)
Input type
B	IEC 60584‑1
E	IEC 60584‑1
J	IEC 60584‑1
K	IEC 60584‑1
L	DIN 43710
Lr	GOST 3044‑84
N	IEC 60584‑1
R	IEC 60584‑1
S	IEC 60584‑1
T	IEC 60584‑1
U	DIN 43710
W3	ASTM E988‑96
W5	ASTM E988‑96
LR	GOST 3044‑84
Cold junction compensation (CJC)	Constant, internal or external over Pt100 or Ni100 RTD
Temperature range internal CJC	-50 ... +100 °C (-58 ... +212 °F)
Connection external CJC	2-wire, 3-wire or 4-wire
External CJC, wire resistance per wire (for 3-wire and 4-wire connections)	50 Ω
Effect of the wire resistance (with 3-wire and 4-wire connections)	< 0.002 Ω/Ω
Input current external CJC	< 0.15 mA
Temperature range external CJC	‑50 ... +135 °C (‑58 ... +275 °F)
Cable, wire-wire capacity	Max. 50 nF
Total wire resistance	Max. 10 kΩ
Fault detection, programmable	None, short-circuited, defective, short-circuited or defective Note The short-circuited fault detection only applies to the CJC input.
Fault detection time (TC)	≤ 75 ms (typically 70 ms)
Fault detection time, external CJC (for 3-wire and 4-wire)	≤ 2 000 ms
Linear resistance
Input range	0 ... 100 kΩ
Minimum measuring span	25 Ω
Connection type	2-wire, 3-wire or 4-wire
Wire resistance per wire	Max. 50 Ω
Input current	< 0.15 mA
Effect of the wire resistance (with 3-wire and 4-wire connections)	< 0.002 Ω/Ω
Cable, wire-wire capacity
R > 400 Ω	Max. 30 nF
R ≤ 400 Ω	Max. 50 nF
Fault detection, programmable	None, defective
Potentiometers
Input range	10 ... 100 kΩ
Minimum measuring span	25 Ω
Connection type	3-wire, 4-wire or 5-wire
Wire resistance per wire	Max. 50 Ω
Input current	< 0.15 mA
Effect of the wire resistance (with 4-wire and 5-wire connections)	< 0.002 Ω/Ω
Cable, wire-wire capacity
R > 400 Ω	Max. 30 nF
R ≤ 400 Ω	Max. 50 nF
Fault detection, programmable	None, short-circuited, defective, short-circuited or defective Note When the configured potentiometer size is below the constant detection limit for short-circuited inputs, the detection of short circuits is disabled regardless of the configuration of the fault detection.
Detection limit for short-circuited input	15 Ω
Fault detection time, wiper arm (no short-circuit detection)	≤ 75 ms (typically 70 ms)
Fault detection time, element	≤ 2 000 ms
Fault detection time (for 4-wire and 5-wire)	≤ 2 000 ms
Voltage input
Measuring range
Unipolar	‑100 ... 1700 mV
Bipolar	‑800 ... +800 mV
Minimum measuring span	2.5 mV
Input resistance	10 MΩ
Cable, wire-wire capacity
Input range: ‑100 ... 1700 mV	Max. 30 nF
Input range: ‑20 ... 100 mV	Max. 50 nF
Fault detection, programmable	None, defective
Fault detection time	≤ 75 ms (typically 70 ms)
Output and HART communication
Normal range, programmable	3.8 ... 20.5 mA/20.5 ... 3.8 mA
Extended range (output limits), programmable	3.5 ... 23 mA/23 ... 3.5 mA
Programmable input/output limits
Fault current	Enable/disable
Fault current setting	3.5 ... 23 mA
Update time	10 ms
Load (with current output)	≤ (V_Supply - 7.5)/0.023 Ω
Load stability	< 0.01% of measuring span/100 Ω (measuring span = currently selected range)
Input fault detection, programmable (detection of input short-circuits is ignored with TC and voltage inputs)	3.5 ... 23 mA
NAMUR NE43 Upscale	> 21 mA
NAMUR NE43 Downscale	< 3.6 mA
HART protocol versions	HART 7
Measuring accuracy
Input accuracy	See "Input accuracy" table
Output accuracy	See "Output accuracy" table
Operating conditions
Ambient temperature	‑50 ... +85 °C (‑58 ... +185 °F)
Ambient temperature for devices with functional safety	‑40 ... +80 °C (‑40 ... +176 °F)
Storage temperature	‑50 ... +85 °C (‑58 ... +185 °F)
Reference temperature for sensor calibration	24 °C ±1.0 °C (75.2 °F ±1.8 °F)
Relative humidity	< 99% (no condensation)
Degree of protection
Transmitter enclosure	IP20
Terminals	IP20
Structural design
Weight	122 g (0.27 lb)
Maximum core cross-section	2.5 mm² (AWG 13)
Tightening torque for clamping screws	0.5 ... 0.6 Nm
Vibrations	IEC 60068‑2‑6
2 ... 25 Hz	± 1.6 mm (0.07 inches)
25 ... 100 Hz	± 4 g
Certificates and approvals
Explosion protection ATEX/IECEx and others
Certificates³⁾	DEKRA 17ATEX0116 X IECEx DEK 17.0054X A5E43700604A-2018X
"Intrinsic safety ia/ib" type of protection	For use in Zone 0, 1, 2, 20, 21, 22
ATEX	II 1 G Ex ia IIC T6 ... T4 Ga II 2(1) G Ex ib [ia Ga] IIC T6 ... T4 Gb II 2 D Ex ia IIIC Db I M1 Ex ia I Ma
IECEx and others	Ex ia IIC T6 ... T4 Ga Ex ib [ia Ga] IIC T6 ... T4 Gb Ex ia IIIC Db Ex ia I Ma
"Intrinsic safety ic" type of protection	For use in Zones 2 and 22
ATEX	II 3 G Ex ic IIC T6…T4 Gc II 3 D Ex ic IIIC Dc
IECEx and others	Ex ic IIC T6 ... T4 Gc Ex ic IIIC Dc
"Non-sparking/increased safety nA/ec" type of protection	For use in Zones 2 and 22
ATEX	II 3 G Ex nA IIC T6…T4 Gc II 3 G Ex ec IIC T6…T4 Gc
IECEx and others	Ex nA IIC T6 ... T4 Gc Ex ec IIC T6 ... T4 Gc
Explosion protection CSA/FM for Canada and USA
Certificates	CSA 1861385 FM18CA0024 FM18US0046
"Intrinsic safety ia" type of protection	IS, CL I, Div 1, GP ABCD, T6 ... T4 Ex ia IIC T6 … T4 Ga, AEx ia IIC T6 … T4 Ga or Ex ib [ia Ga] IIC T6…T4 Gb, AEx ib [ia Ga] IIC T6…T4 Gb
"Non incendive field wiring NIFW" type of protection	NIFW, CL I, Div 2, GP ABCD T6 ... T4
"Non incendive NI" type of protection	NI, CL I, Div 2, GP ABCD T6...T4 Ex nA IIC T6 ... T4 Gc AEx nA IIC T6 ... T4 Gc

¹⁾ Note that the minimum supply voltage must correspond to the value measured at the terminals of the SITRANS TR420. All external voltage drops must be taken into account.

²⁾ Protect the device from overvoltage with the help of a suitable power supply or suitable overvoltage protection equipment.

³⁾ Additional available certificates are listed on the internet at http://www.siemens.com/processinstrumentation/certificates

Measuring ranges/Minimum measuring span

RTD

Input type	Standard	Measuring range in °C (°F)	α₀ in °C^-1 (°F^-1)	Minimum measuring span in °C (°F)
Pt10 ... 10000	IEC 60751	‑200 ... +850 (‑328 ... +1 562)	0.003851 (0.002139)	10 (50)
	JIS C 1604‑8	‑200 ... +649 (‑328 ... +1 200)	0.003916 (0.002176)	10 (50)
	GOST 6651_2009	‑200 ... +850 (‑328 ... +1 562)	0.003910 (0.002172)	10 (50)
	Callendar-Van Dusen	‑200 ... +850 (‑328 ... +1 562)	-	10 (50)
Ni10 ... 10000	DIN 43760-1987	‑60 ... +250 (‑76 ... +482)	0.006180 (0.003433)	10 (50)
Ni10 ... 10000	GOST 6651-2009/OIML R84:2003	‑60 ... +180 (‑76 ... +356)	0.006170 (0.003428)	10 (50)
Cu5 ... 1000	Edison Copper Winding No. 15	‑200 ... +260 (‑328 ... +500)	0.004270 (0.002372)	100 (212)
	GOST 6651‑2009/OIML R84:2003	‑180 ... +200 (‑292 ... +392)	0.004280 (0.002378)	100 (212)
	GOST 6651‑94	‑50 ... +200 (‑58 ... +392)	0.004260 (0.002367)	100 (212)

Input type	Standard	Measuring range in °C (°F)	Minimum measuring span in °C (°F)
B	IEC 60584‑1	0 (85) ... 1 820 (32 (185) ... 3 308)	100 (212)
E	IEC 60584‑1	‑200 ... +1 000 (‑392 ... +1 832)	50 (122)
J	IEC 60584‑1	‑100 ... +1 200 (‑212 ... +2 192)	50 (122)
K	IEC 60584‑1	‑180 ... +1 372 (‑356 ... +2 502)	50 (122)
L	DIN 43710	‑200 ... +900 (‑392 ... +1 652)	50 (122)
Lr	GOST 3044‑84	‑200 ... +800 (‑392 ... +1 472)	50 (122)
N	IEC 60584‑1	‑180 ... +1 300 (‑356 ... +2 372)	50 (122)
R	IEC 60584‑1	‑50 ... +1 760 (‑122 ... +3 200)	100 (212)
S	IEC 60584‑1	‑50 ... +1 760 (‑122 ... +3 200)	100 (212)
T	IEC 60584‑1	‑200 ... +400 (‑392 ... +752)	50 (122)
U	DIN 43710	‑200 ... +600 (‑392 ... +1 112)	50 (122)
W3	ASTM E988‑96	0 ... 2 300 (32 ... 4 172)	100 (212)
W5	ASTM E988‑96	0 ... 2 300 (32 ... 4 172)	100 (212)
LR	GOST 3044‑84	‑200 ... +800 (‑392 ... +1472)	50 (122)

Input accuracy

Basic values

Input type	Basic accuracy	Temperature coefficient¹⁾
RTD
Pt10	≤ ±0.8 °C (1.44 °F)	≤ ±0.020 °C/°C (°F/°F)
Pt20	≤ ±0.4 °C (0.72 °F)	≤ ±0.010 °C/°C (°F/°F)
Pt50	≤ ±0.16 °C (0.288 °F)	≤ ±0.004 °C/°C (°F/°F)
Pt100	≤ ±0.04 °C (0.072 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt200	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt500	T_max. < 180 °C (356 °F) = ≤ ±0.08 °C (0.144 °F) T_max. > 180 °C (356 °F) = ≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt1000	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt2000	T_max. < 300 °C (572 °F) = ≤ ±0.08 °C (0.144 °F) T_max. > 300 °C (572 °F) = ≤ ±0.4 °C (0.72 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt10000	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Pt x	Largest tolerance of neighboring points	Largest temperature coefficient of neighboring points
Ni10	≤ ±1.6 °C (2.88 °F)	≤ ±0.020 °C/°C (°F/°F)
Ni20	≤ ±0.8 °C (1.44 °F)	≤ ±0.010 °C/°C (°F/°F)
Ni50	≤ ±0.32 °C (0.576 °F)	≤ ±0.004 °C/°C (°F/°F)
Ni100	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni120	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni200	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni500	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni1000	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni2000	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni10000	≤ ±0.32 °C (0.576 °F)	≤ ±0.002 °C/°C (°F/°F)
Ni x	Largest tolerance of neighboring points	Largest temperature coefficient of neighboring points
Cu5	≤ ±1.6 °C (2.88 °F)	≤ ±0.040 °C/°C (°F/°F)
Cu10	≤ ±0.8 °C (1.44 °F)	≤ ±0.020 °C/°C (°F/°F)
Cu20	≤ ±0.4 °C (0.72 °F)	≤ ±0.010 °C/°C (°F/°F)
Cu50	≤ ±0.16 °C (0.288 °F)	≤ ±0.004 °C/°C (°F/°F)
Cu100	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)
Cu200	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)
Cu500	≤ ±0.16 °C (0.288 °F)	≤ ±0.002 °C/°C (°F/°F)
Cu1000	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)
Cu x	Largest tolerance of neighboring points	Largest temperature coefficient of neighboring points
Linear resistance
0 ... 400 Ω	≤ ±40 mΩ	≤ ±2 mΩ/°C (1.11 mΩ/°F)
0 ... 100 kΩ	≤ ±4 Ω	≤ ±0.2 Ω/°C (0.11 Ω/°F)
Potentiometers
0 ... 100%	< 0.05%	< ± 0.005%
Voltage input
mV: -20 ... 100 mV	≤ ±5 μV	≤ ±0.2 μV/°C (0.11 μV/°F)
mV: -100 ... 1700 mV	≤ ±0.1 mV	≤ ±36 μV/°C (20 μV/°F)
mV: ± 800 mV	≤ ±0.1 mV	≤ ±32 μV/°C (17.8 μV/°F)
TC
E	≤ ±0.2 °C (0.36 °F)	≤ ±0.025 °C/°C (°F/°F)
J	≤ ±0.25 °C (0.45 °F)	≤ ±0.025 °C/°C (°F/°F)
K	≤ ±0.25 °C (0.45 °F)	≤ ±0.025 °C/°C (°F/°F)
L	≤ ±0.35 °C (0.63 °F)	≤ ±0.025 °C/°C (°F/°F)
N	≤ ±0.4 °C (0.72 °F)	≤ ±0.025 °C/°C (°F/°F)
T	≤ ±0.25 °C (0.45 °F)	≤ ±0.025 °C/°C (°F/°F)
U	< 0 °C (32 °F) ≤ ±0.8 °C (1.44 °F) ≥ 0 °C (32 °F) ≤ ±0.4 °C (0.72 °F)	≤ ±0.025 °C/°C (°F/°F)
Lr	≤ ±0.2 °C (0.36 °F)	≤ ±0.1 °C/°C (°F/°F)
R	< 200 °C (392 °F) ≤ ±0.5 °C (0.9 °F) ≥ 200 °C (392 °F) ≤ ±1 °C (1.8 °F)	≤ ±0.1 °C/°C (°F/°F)
S	< 200 °C (392 °F) ≤ ±0.5 °C (0.9 °F) ≥ 200 °C (392 °F) ≤ ±1 °C (1.8 °F)	≤ ±0.1 °C/°C (°F/°F)
W3	≤ ±0.6 °C (1.08 °F)	≤ ±0.1 °C/°C (°F/°F)
W5	≤ ±0.4 °C (0.72 °F)	≤ ±0.1 °C/°C (°F/°F)
B²⁾	≤ ±1 °C (1.8 °F)	≤ ±0.1 °C/°C (°F/°F)
B³⁾	≤ ±3 °C (5.4 °F)	≤ ±0.1 °C/°C (°F/°F)
B⁴⁾	≤ ±8 °C (14.4 °F)	≤ ±0.8 °C/°C (°F/°F)
B⁵⁾	Not specified	Not specified
CJC (internal)	< ±0.5 °C (0.9 °F)	Included in basic accuracy
CJC (external)	≤ ±0.08 °C (0.144 °F)	≤ ±0.002 °C/°C (°F/°F)

¹⁾ Temperature coefficients correspond to the specified values or 0.002% of the input span, depending on which value is greater.

²⁾ Accuracy of the specification range > 400 °C (752 °F)

³⁾ Accuracy of the specification range > 160 °C (320 °F) < 400 °C (752 °F)

⁴⁾ Accuracy of the specification range > 85 °C (185 °F) < 160 °C (320 °F)

⁵⁾ Accuracy of the specification range < 85 °C (185 °F)

Output accuracy

Output type	Basic accuracy	Temperature coefficient
Average value measurement	Average of accuracy of input 1 and input 2	Average of temperature coefficient of input 1 and input 2
Differential measurement	Sum of accuracy of input 1 and input 2	Sum of temperature coefficient of input 1 and input 2
Analog output	≤ ±1.6 μA (0.01% of the full output span)	≤ ±0.48 μA/K (≤ ±0.003% of the full output span/K)

Dimensional drawings

SITRANS TR420, dimensions in mm (inch)

Circuit diagrams

Connections

SITRANS TR420, connector assignment

Output and test connection

SITRANS TR420, output connection assignment

Input connection

SITRANS TR420, input connection assignment

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SITRANS TR420 (HART, UNIVERSAL) Overview

Overview

Benefits

Application

Function

Technical specifications

Measuring ranges/Minimum measuring span

Input accuracy

Output accuracy

Dimensional drawings

Circuit diagrams

Connections