Siemens Sitrans TH300 Temperature Transmitters

SITRANS TH300 with HART- protocol is designed to support all common thermocouples, resistance and millivolt sensors. Setup is quick and easy with SIMATIC PDM or handheld communicator. Unique user-friendly details are implemented: Without opening the 4..20mA loop the output current can read out directly with a multimeter. A red/green LED shows the technician the status at a glance.

Detail

Input Resistance thermometers, Thermocouples, Resistance-type sensors, DC sources
Output 4 to 20 mA, HART
Siemens Sitrans TH300
  • Compact design
  • Flexible mounting and center hole allow you to select your preferred type of installation
  • Electrically isolated
  • Test sockets for multimeters
  • Diagnostics LED (green/red)
  • Sensor monitoring
    open circuits and short-circuits
  • Self-monitoring
  • Configuration status stored in EEPROM
  • SIL2 (with order code C20), SIL2/3 (with C23)
  • Expanded diagnostic functions, such as slave pointer, operating hours counter, etc.
  • Special characteristic
  • Electromagnetic compatibility to EN 61326 and NE21

Siemens Sitrans TH300 Temperature Transmitters

The SITRANS TH300 is configured over HART. This can be done using a handheld communicator or even more conveniently with a HART modem and the SIMATIC PDM parameterization software. The configuration data are then permanently stored in the non-volatile memory (EEPROM).

Once the sensors and power supply have been correctly connected, the transmitter outputs a temperature-linear output signal and the diagnostics LED displays a green light. In the case of a sensor short-circuit, the LED flashes red, an internal device fault is indicated by a steady red light.

The test socket can be used to connect an ammeter at any time for monitoring purposes and plausibility checks. The output current can be read without any interruption, or even without opening the current loop.

SITRANS TH 300 function diagram

Dimensional drawings

SITRANS TH300, dimensions and pin assignment, dimensions in mm (inch)

Mounting on DIN rail

SITRANS TH300, mounting of transmitter on DIN rail

DIN rail adapter, dimensions in mm (inch)

Technical specifications

Input

Resistance thermometer

Measured variable

Temperature

Sensor type
  • According to IEC 60751

Pt25 … Pt1000
  • Acc. to JIS C 1604; a = 0.00392 K-1

Pt25 … Pt1000
  • According to IEC 60751

Ni25 … Ni1000
  • Special type

Via special characteristic (max. 30 points)

Sensor factor

0.25 … 10 (adaptation of the basic type, e.g. Pt100 to version Pt25 … 1000)

Units

°C or °F

Connection
  • Standard connection

1 resistance thermometer (RTD) in 2-wire, 3-wire or 4-wire system
  • Averaging

2 identical resistance thermometers in 2-wire system for generation of average temperature
  • Differentiation

2 identical resistance thermometers (RTD) in 2-wire system (RTD 1 – RTD 2 or RTD 2 – RTD 1)

Connection
  • 2-wire system

Line resistance can be configured ≤100 Ω (loop resistance)
  • 3-wire system

No trim necessary
  • 4-wire system

No trim necessary

Sensor current

≤ 0.45 mA

Response time

≤ 250 ms for 1 sensor with break monitoring

Break monitoring

Always active (cannot be switched off)

Short-circuit monitoring

Can be switched on/off (default value: ON)

Measuring range

Assignable (see “Digital measuring error” table)

Min. measuring span

10 °C (18 °F)

Characteristic curve

Temperature-linear or special characteristic

Resistance-based sensor

Measured variable

Actual resistance

Sensor type

Resistance-based, potentiometers

Units

Ω

Connection
  • Normal connection

1 resistance-based sensor (R) in 2-wire, 3-wire or 4-wire system
  • Averaging

2 resistance-based sensors in 2-wire system for generation of average value
  • Differentiation

2 resistance thermometers in 2-wire system
(R1 – R2 or R2 – R1)

SITRANS TH300 (UNIVERSAL, HART) ORDERING DATA

Product No. / Product Description Listprice / Your price
7NG3212-0….
Temperature transmitter SITRANS TH300 For installation in the connection head, Type B (DIN 43729), Two-wire system 4 … 20 mA, programmable, communication-capable acc. to HART, with electrical isolation
7NG3212-0AN00
Temperature transmitter SITRANS TH300 For installation in the connection head, Type B (DIN 43729), Two-wire system 4 … 20 mA, programmable, communication-capable acc. to HART, with electrical isolation With explosion protection to ATEX . .
7NG3212-0BN00
Temperature transmitter SITRANS TH300 For installation in the connection head, Type B (DIN 43729), Two-wire system 4 … 20 mA, programmable, communication-capable acc. to HART, with electrical isolation With explosion protection to FM (cFMUS) . .
7NG3212-0NN00
Temperature transmitter SITRANS TH300 For installation in the connection head, Type B (DIN 43729), Two-wire system 4 … 20 mA, programmable, communication-capable acc. to HART, with electrical isolation Without explosion protection . .

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