tb45.pdf

TB 45

Temperature limiter / monitor

Compact design

Suitable for heating and refrigeration processes

For all thermocouple types and resistive sensors

Display & operating functions

Communication functions

Two relay outputs

Analog output

Two universal inputs

Reset via front key combination / external contact

Type-tested to DIN 3440 / EN 14597

FEATURES

Limit signalling function for any

type of input signal

The user-configurable engineering unit

of the measured value can be included

in the display. By means of the exten-

ded Operating Level, it is possible to

show any signal or parameter in the

2nd display line.

Configurable as limiter, monitor,

or limit signaller

...

Compact design, only 22,5 mm

wide

DESCRIPTION

Clips onto top-hat DIN rail

The temperature limiter TB 45 is inten-

ded for precise, cost-effective signal

monitoring & limiting tasks.

Plug-in screw terminals or

spring-clamp connectors

Interfaces and Engineering Tools

The limiter’s settings are also configu-

rable by means of an Engineering

Tool.

Dual-line LC display with addi-

tional display elements

Every TB 45 is fitted with at least one

universal input and two output relays.

Convenient 3-key operation

Communication via bus connec-

tor fitted in top-hat rail

BluePort® front interface

Two universal inputs

Optionally, the TB 45 can be supplied

with an analog output for display pur-

poses.

Via the BlueContro ® software (which

includes a limiter simulation), and

especially the convenient connection

via the BluePort® front interface, the

user can solve the task in hand wit-

hout having to work through operating

instructions.

Galvanic isolation is provided between

inputs and outputs as well as from the

supply voltage and the communication

interfaces.

One or two relay outputs

Two pre-alarms

Of course, practically all settings can

also be made from the device front.

Universal output for display val-

ues

Mounting

The compact TB 45 is clipped onto a

top-hat DIN rail, and can also be un-

mounted very simply.

All connections are of the plug-in type,

so that a device can be replaced very

quickly without disturbing the wiring.

Moreover, the TB 45 can exchange

data with superordinate PLCs and PCs

via an optional RS 485 interface with

Modbus RTU protocol that is fitted

into the top-hat DIN rail.

APPLICATIONS

All plants, in which an exceeded

min/max temperature limit can

cause serious damage.

Devices with option system interface

can be connected to fieldbus coupler

of the rail line series.

Display and operation

The dual-line LC display permits simul-

taneous indication of the measured va-

lue and all of the unit’s operating

functions.

Heating system in buildings to

DIN EN 12828

Password protection

Unauthorized access to the limit set-

tings and the Operating Levels is pre-

vented with a password.

Large hot-water boilers to DIN EN

12953-6

Moreover, a LED and 4 other display

elements give a reliable indication of

operating status, operating mode, and

error messages.

Thermal transfer plants with or-

ganic heat transfer media to DIN

4754

Oil-fired installations to DIN 4755

TECHNICAL DATA

Table 1: Thermocouple input

INPUTS

Thermocouple type

Measurement range

Accuracy

Typical resol.

Survey of inputs

Input

Fe-CuNi (DIN)

-100...900°C

-148...1652°F

ß 2K

0.1 K

Fe-CuNi

-100...1200°C

-148...2192°F

ß 2K

0.1 K

Purpose

NiCr-Ni

-100...1350°C

-148...2462°F

ß 2K

0.2 K

INP1

X1 (process value 1), universal

input

Nicrosil/Nisil

-100...1300°C

-148...2372°F

ß 2K

0.2 K

PtRh-Pt 10%

0...1760°C

32...3200°F

ß 2K

0.2 K

INP2

(Option)

X2 (process value 2), universal

input; input for additional limit

monitoring and display

PtRh-Pt 13%

0...1760°C

32...3200°F

ß 2K

0.2 K

T**

Cu-CuNi

-200...400°C

-328...752°F

ß 2K

0.05 K

di1

Operation disabled; Reset of stored

alarms

W5%Re-W26%Re

0...2315°C

32...4199°F

ß 3K

0.4 K

W3%Re-W25%Re

0...2315°C

32...4199°F

ß 3K

0.4 K

NiCr-CuNi

-100...1000°C

-148...1832°F

ß 2K

0.1 K

UNIVERSAL INPUT INP1

Type: single-ended, except thermocouples

Resolution:

PtRh-Pt6%

0(400)...1820°C

32(752)...3308°F

ß 3K

0.3 K

Special

-25 … +75 mV

ß 0.1%

0.01%

* Values apply from 400 °C upwards

**Values apply from -80°C upwards

> 14 bits

Decimal point:

0 to 3 decimals

Digital input filter:

adjustable 0.0...999.9 s

Table 2: Resistive inputs

Scanning cycle:

100 ms

Linearization:

15 segments, adaptable

with BlueControl ®

Type

Sensor current

Measuerement range

Accuracy

Typical resol.

Measurement value

correction:

2-point or offset

Pt100 ***

-200..100(150)°C

-328...212(302)°F

ß 1 K

0.1 K

Pt100

-200...850°C

-328...1562°F

ß 1 K

0.1 K

Thermocouples (Table 1)

Input resistance:

Pt1000

-200...850°C

-328...1562°F

ß 2 K

0.1 K

? 1M [

KTY 11-6*

-50...150°C

-58...302°F

ß 2 K

0.1 K

Influence of source

resistance:

1 ú V/ [

Special

0...4500 [ **

ß 0.1%

0.01%

≤ 0,25 mA

Special

0...450 [ **

ß 0.1%

0.01%

Input circuit monitor

break, reversed polarity

Potentiom.

0...160 [ **

ß 0.1%

0.01%

Potentiom.

0...450 [ **

ß 0.1%

0.01%

Cold-junction compensation

•

Poti

0...1600 [ **

ß 0.1%

0.01%

Internal

- additional error:

typical:

max.:

Poti

0...4500 [ **

ß 0.1%

0.01%

* Default setting is the characteristic for KTY 11-6 (-50...150°C)

** Including lead resistance

ß_ 0.5 K

ß +1.2 K

•

External

0...100 °C

Table 3: Current and voltage input

Measurement range

Input resistance

Accuracy

Typical resol.

Break monitoring

Sensor current:

0...20 mA

20 [

ß 0.1 %

1,5 µ A

≤ 1 ú A

0...10 V

≈ 110 k [

ß 0.1 %

0,6 mV

Operating sense configurable

-10...10 V

≈ 110 k [

ß 0.1 %

1,2 mV

-5...5 V

≈ 110 k [

ß 0.1 %

0,6 mV

Resistive sensors (Table 2)

Connection technique:

-2,5...115 mV*

>1M [

ß 0.1 %

6 µ V

3-wire or

4-wire (not available if

using INP2)

-25...1150 mV*

>1M [

ß 0.1 %

60 µ V

-25...90 mV*

>1M [

ß 0.1 %

8 µ V

-500...500 mV*

>1M [

ß 0.1 %

80 µ V

Lead resistance

(for max. span):

max. 30 [

-200...200 mV*

>1M [

ß 0.1 %

40 µ V

* For INP1: high-impedance, without break monitoring

for INP2: high impedance, break monitoring always active

Input circuit monitoring:

break and short circuit

Input circuit

monitoring (current):

12.5% below span start

(2 mA)

Measurement span

separated into ranges

Physical measurement range:

ADDITIONAL INPUT INP2

(UNIVERSAL, OPTIONAL)

Resolution:

0...4500 [

O 2 - measuring (option)

EMI-measuring by means of INP1

(high-impedance mV-inputs)

suitable for probes with

–

> 14 bits

Digital input filter:

adjustable 0.0...999.9 s

The BlueControl ® software enables

the internal characteristic curve for the

KTY 11-6 temperature sensor to be

adapted.

Scanning cycle:

100 ms

Linearization:

as for INP1

Measurement value

correction:

2-point or offset

constant sensor temperature

(heated probes), setting by means of

parameter

Type:

single-ended except

thermocouples

Current and voltage measurement

(Table 3)

Span start and span:

–

measured sensor temperature

(non-heated probes), measuring by

means of INP2

anywhere within the

measurement range

Scaling:

freely selectable

–1999...9999

TB 45

Thermocouples (Table 1)

Max. contact

rating:

500 VA, 250 VAC, 2A

at 48...62 Hz, resistive load

Between power supply and

in-/outputs:

2.3 kV AC, 1 min

Cold-junction compensation

•

Min. contact

rating:

6V,1mADC

Between input and output :

500 V AC; 1min

Internal

- additional error:

typical:

max.:

Switching

cycles

(electrical):

for I=1A/2A: ? 800.000/500.000

(at 250VAC, resistive load)

Isolation:

between in-/output against

earth:

ß_ 0.5 K

ß -2.5 K

ß 33VAC

Note:

If the relays OUT1 and OUT2 operate external

contactors, these must be fitted with RC

snubber circuits to manufacturer

specifications to prevent excessive voltage

peaks at switch-off.

•

External

0...100 °C

Remaining technical data as for INP1.

Fig.1: galvanic isolation

Resistive sensors (Table 2)

Connection technique:

System

RS 485

Input INP1

Input INP2

3-wire

Front interface

Power

Measurement span

Remaining technical data as for INP1.

di 1 (contact)

di 1 (option

optocoupler)

OUT3 AS UNIVERSAL OUTPUT

(OPTION)

Galvanically isolated from the inputs.

Parallel current/voltage output with

common ‘minus’ terminal (combined

use only in galvanically isolated cir-

cuits).

Freely scalable

Resolution:

Current and voltage measurement

(Table 3)

Remaining technical data as for INP1

except:

•

Relay LC

Relay OUT2

Output OUT3

Voltage input ranges –10...0...+10V and

-5...+5V not possible.

Safety isolation

Functionisolation

•

14 bits

Millivolt input ranges: break monitoring

always active.

Tracking error I/U :

ß 2%

Residual ripple: (referred to

end of span)

ß_ 1%

0...130 kHz

FUNCTIONS

CONTROL INPUT DI1 (RESET)

Current output

0/4...20 mA, configurable

short-circuit proof

Control range:

Configurable as direct or inverse

switch or push button!

LC RELAY OUTPUT

Interruption of the power supply if the

upper or lower limit for the process va-

lue is exceeded.

Possible operation as:

Contact input

Connection of potential-free contact

that is suitable for switching ‘dry’ cir-

cuits.

Switched voltage:

-0,5...23 mA

Load:

ß 700 [

Load effect:

ß 0,02%

Limiter

•

Resolution:

ß 1,5 ú A

5 V

Switch-off if a limit is exceeded

Error:

ß 0,1%

Switched current:

1 mA

•

Output is re-enabled when the

process value is within limits again

(incl. hysteresis), and the electronic

latch has been released manually

via the reset function.

Voltage output

0/2...10V, configurable

not continuously short-circuit proof

Control range:

Optocoupler input

Actively switched optocoupler input

Nominal voltage:

24 V DC external

-0,15...11,5 V

Logic ”0”:

-3 V…+5 V

Monitor

•

Logic ”1”:

15 V…30 V

Load:

? 2k [

Switch-off if a limit is exceeded

Current demand:

max. 6 mA

Load effect:

ß 0,06%

•

Output is re-enabled automatically

when the process value is within

limits again (incl. hysteresis).

Resolution:

ß 0,75 mV

Error:

ß 0,1%

OUTPUTS

Additional error with

simultaneous use of

current output

ß 0,09%

SURVEY OF OUTPUTS

Limit signaller

•

Limit signalling function (see below)

Output

Purpose

LC (relay)

Limit contact, alarms *

OUT3 as transmitter supply

Process value settings:

INP1, optional difference INP1-INP2,

MAX/MIN (INP1, INP2), O 2 measure-

ment.

OUT2 (relay)

Limit contact, alarms, errors *

Output:

22 mA / ? 13 V

OUT3 (logic,

option)

Same as OUT2

OUT3 as logic signal

Load ≤ 700 [

OUT3

(continuous,

option)

Analog output

(display value, Inp1,

Inp2),

Transmitter supply

0/ ß 23 mA

Load > 500 [

0/> 13 V

* All logic signals can be ”OR-linked”.

GALVANIC ISOLATION (FIG. 1)

RELAY OUTPUTS LC, OUT2

Type:

Galvanic isolation is provided between

inputs and outputs as well as from the

supply voltage (3-port-isolation).

Test voltage:

2 NO contacts with a common

terminal

TB 45

OTHER LIMIT SIGNALLING

FUNCTIONS

Fig. 2: Connections TB 45

(mV)

MAX, MIN or MAX+MIN monitoring

with adjustable hysteresis

2 additional alarms available.

INP2

di1

Monitored signals

•

Process value (absolute)

•

INP1

Difference to limit contact LC

(relative)

•

top

Input 1

RGND

•

Input 2

Data A

Data B

Functions

• Input circuit monitoring

• Input circuit monitoring with

latching

Several limit and alarm signals can be

”OR-linked” for output.

RS 485

Logic

OUT3

ALARMS

Sensor break/short circuit

Depending on the selected input type,

the input circuit is monitored for break,

short circuit, and reversed polarity.

Behaviour on sensor break / short cir-

cuit

•

PWR

OUT2

~90-260V

~24V

System

Response of the analog output is

selectable (upscale / downscale)

•

Parameters

•

Extended Operating Level

MAINTENANCE MANAGER

Additional display elements

4 display elements (bars in the lower

line of the LCD)

•

SIGNAL LINKING (OPTION)

Display of error messages, warnings,

and stored limit value messages in the

error list. Messages are stored, and

can be reset manually.

Possible elements in the error list:

Additional combinations if INP2 is fit-

ted:

•

Identifiers1&2:LC/OUT2 active

•

Difference INP1 - INP2

Identifier TB:

Adjusted function as temperature

limiter.

•

Max. value selection INP1, INP2

Sensor break, short circuit, incorrect polarity

Stored limit values

e.g. re-calibration warning (message is

generated when a predefined operating time is

reached)

e.g. maintenance interval for a switching device

(message is generated when a predefined

number of switching cycles is reached)

Internal fault (RAM, EEPROM, ...)

•

Min- value selection INP1, INP2

•

Identifier E:

Entry has been made in the error

list.

•

O 2 measurement with constant sensor

temperature (INP1: mV input)*

•

O 2 measurement with measured sensor

temperature (INP1: mV input, INP2:

temperature input)*

* Precise calculation using Nernst

equation.

LED

Dual-colour

•

Green: OK

•

Green, blinking: no data exchange

with bus coupler (only for devices

with system option)

DISPLAY AND OPERATION

•

Red: limit value Lim1/LC exceeded

•

Display

Red, blinking: internal fault

LCD

dual-line plus additional display ele-

ments

Operating functions

Only three keys at the front of the TB

45 are used to operate process values,

parameters, and configuration data.

Different Operating Levels and selec-

ted parameters can be disabled by me-

ans of BlueControl ® .

Upper line

4 digits, 7 segments for:

•

Process value

•

Limit value of LC

Lower line

5 digits, 14 segments; configurable

contents (via BlueControl )

•

Engineering unit

TB 45

POWER SUPPLY

Fig. 3: Dimensions

Depending on ordered version:

AC supply

Voltage:

90...260 V AC

Frequency:

48...62 Hz

Power consumption:

approx. 7 VA max.

2.3

Universal supply 24 V UC*

(0,08”)

AC voltage: 18...30 V AC

Frequency: 48...62 Hz

DC voltage: 18...31 V DC

Power consumption: approx. 4 VA / 3W max.

Supply only from protective low-voltage sources

(SELV)

* Devices with system option:

They are supplied via the bus connector from

bus coupler or power supply module.

111 (4,37”)

22.5

Behaviour with power failure

Configuration and parameter settings:

Permanent storage in EEPROM

(0,87”)

117.5 (4,63”)

Electromagnetic compatibility

Complies with EN 61 326-1 for conti-

nuous, unattended operation.

Interference radiation:

• Within the limits for Class B devices.

Immunity to interference:

Meets the test requirements for devi-

ces in industrial areas.

ENVIRONMENTAL CONDITIONS

BLUEPORT

FRONT INTERFACE

Protection classes

Connection to the transmitter front via

a PC adapter (see ‘Accessories’). The

BlueControl ® software enables the

TB 45 to be configured, parameters

set, and operated.

Front panel:

IP 20

Housing:

IP 20

Terminals:

IP 20

Permissible temperatures

BUS INTERFACE (OPTIONAL)

Evaluation criteria:

•

For specified

accuracy:

-10...55°C

Surge interference partly has marked effects,

which decay after the interference stops.

RS 485

Warm-up time: ß 20 minutes

Temperature effect: ß 0.05% / 10 K

Additional effect of

CJ compensation:

•

With high levels of surge interference on 24

VAC mains leads, it is possible that the device

is reset.

Connection via bus connector fitted in

the top-hat rail. Screened cables

should be used.

ß 0.05% / 10 K

•

With HF interference, effects up to 50 µV can

occur.

Operating limits:

-20...60°C

Galvanically isolated

Type:

For storage:

-30...70°C

RS 485

GENERAL

Transmission speed:

2400, 4800, 9600,

19,200, 38,400 bits/s

Humidity

Max. 95%, 75% yearly average, no

condensation

Housing front:

Material

Parity:

even, odd, none

Polyamid PA 6.6

Address range:

1...247

Flammability class:

V0 (UL 94)

Shock and vibration

Number of devices per

bus segment:

Vibration test Fc (DIN EN 60 068-2-6)

Connecting terminals:

Material:

Frequency:

10...150 Hz

PROTOCOL

•

Polyamid PA

Unit in operation:

1g or 0.075 mm

Flammability class:

V2 (UL 94) for screw

terminals

V0 (UL 94) for

spring-clamp

terminals and bus

connections

MODBUS RTU

Unit not in

operation:

2g or 0.15 mm

SYSTEM INTERFACE

Shock test Ea (DIN EN 60 068-2-27)

For connection to fieldbus couplers

(see system components)

Connection via bus connector fitted in

the top-hat rail.

Technical data see data sheet

9498-737-50913.

Shock:

15g

Electrical safety

Complies with EN 61 010-1:

Over-voltage category II

Contamination degree 2

Protection class II

Duration:

11ms

TB 45

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