RTD/resistance measurement

Comparative overview of Beckhoff R/RTD measuring devices (terminals, boxes, modules)

The following table is intended to provide a quick overview of the available Beckhoff I/O devices for the direct connection of RTD sensors for temperature and resistance measurement.

Notice

Device documentation is solely authoritative

The values may be shortened extracts from the respective documentation, which is decisive and recommended for detailed analysis.

For a possibly more up-to-date overview, please consult www.beckhoff.com.

 

Design

Number of RTD
channels

Connection
technology

Resolution

Conversion time/sampling rate 1)

KL3201

K-bus terminal IP20

1

Spring-loaded technology

0.1 °C/0.5 °C

~200…250 ms

KL3202

K-bus terminal IP20

2

Spring-loaded technology

0.1 °C/0.5 °C

~200…250 ms

KL3204

K-bus terminal IP20

4

Spring-loaded technology

0.1 °C/0.5 °C

~200…250 ms

KL3204-0030

K-bus terminal IP20

4

Spring-loaded technology

0.1 °C

~250 ms

KL3208-0010

K-bus terminal IP20

8

Spring-loaded technology

0.01 °C/0.1 °C

~250 ms

KL3228

K-bus terminal IP20

8

Spring-loaded technology

0.01 °C/0.1 °C

~250 ms

KL3222

K-bus terminal IP20

2

Spring-loaded technology

0.01 °C/0.1 °C

~50 ms

KL3214

K-bus terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

~170 ms

EL3201

EtherCAT Terminal IP20

1

Spring-loaded technology

0.01 °C/0.1 °C

4…500 ms

EL3201-0010

EtherCAT Terminal IP20

1

Spring-loaded technology

0.01 °C/0.1 °C

4…500 ms

EL3202

EtherCAT Terminal IP20

2

Spring-loaded technology

0.01 °C/0.1 °C

2…800 ms

EL3202-0010

EtherCAT Terminal IP20

2

Spring-loaded technology

0.01 °C/0.1 °C

4…500 ms

EL3204

EtherCAT Terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

2…800 ms

EL3204-0162

EtherCAT Terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

33…833 ms

EL3204-0200

EtherCAT Terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

4…500 ms

EL3208

EtherCAT Terminal IP20

8

Spring-loaded technology

0.01 °C/0.1 °C

4.5…1600 ms

EL3208-0010

EtherCAT Terminal IP20

8

Spring-loaded technology

0.01 °C/0.1 °C

12.8…7800 ms

EL3214

EtherCAT Terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

5…1600 ms

EL3214-0090

EtherCAT Terminal IP20

4

Spring-loaded technology

0.01 °C/0.1 °C

5…1600 ms

EL3218

EtherCAT Terminal IP20

8

Spring-loaded technology

0.01 °C/0.1 °C

20…1600 ms

EL3692

EtherCAT Terminal IP20

2

Spring-loaded technology

>= 12 µΩ

10 … 400 ms

EL3751

EtherCAT Terminal IP20

1

Spring-loaded technology

0.01 °C

>= 100 µs (10 kSps)

EL3751-0004

EtherCAT Terminal IP20

1

Spring-loaded technology

0.01 °C

>= 100 µs (10 kSps)

ELM3244, ELM3246

EtherCAT Terminal IP20

4/6

Push-in

0.1/0.01/0.001 °C

> 1 ms (1 kSps) per channel

ELM3502

EtherCAT Terminal IP20

2

Push-in

0.1/0.01/0.001 °C

>= 50 µs (20 kSps) per channel

ELM3504

EtherCAT Terminal IP20

4

Push-in

0.1/0.01/0.001 °C

>= 100 µs (10 kSps) per channel

ELM3702, ELM3704

EtherCAT Terminal IP20

2/4

Push-in

0.1/0.01/0.001 °C

>= 100 µs (10 kSps) per channel

ELM3702-0101

EtherCAT Terminal IP20

2

LEMO

0.1/0.01/0.001 °C

>= 100 µs (10 kSps) per channel

EP3204-0002,
EPP3204-0002

EtherCAT Box IP67,
EtherCAT P Box IP67

4

M12

0.1 °C

2 … 800 ms

EJ3202

EtherCAT plug-in module

2

On application-specific signal distribution boards

0.01 °C/0.1 °C

2 … 800 ms

EJ3214

EtherCAT plug-in module

4

On application-specific signal distribution boards

0.01 °C/0.1 °C

5 … 1600 ms

1) depending on settings, e.g. active input channels and filters, for complete and authoritative information see respective documentation

Continuation:

 

Measurement uncertainty 2)

Oversampling

Distributed Clocks for timestamp operation

Electrically isolated channels

TwinSAFE SC

KL3201

< ±1 °C

-

-

-

-

KL3202

< ±1 °C

-

-

-

-

KL3204

< ±1 °C

-

-

-

-

KL3204-0030

< ±1 °C

-

-

-

-

KL3208-0010

< ±1.5 °C

-

-

-

-

KL3228

< ±1 °C

-

-

-

-

KL3222

< ±0.1 °C

-

-

-

-

KL3214

< ±0.5 °C

-

-

-

-

EL3201

< ±0.5 °C

-

-

-

-

EL3201-0010

< ±0.1 °C

-

-

-

-

EL3202

< ±0.5 °C

-

-

-

-

EL3202-0010

< ±0.1 °C

-

-

-

-

EL3204

< ±0.5 °C

-

-

-

-

EL3204-0162

< ±0.5 °C

-

-

-

-

EL3204-0200

< ±0.3 % 3)

-

-

-

-

EL3208

< ±0.5 °C

-

-

-

-

EL3208-0010

-20…+60 °C: ±0.25 °C
-50…+150 °C: ±1.5 °C

-

-

-

-

EL3214

< ±0.5 °C

-

-

-

-

EL3214-0090

< ±0.5 °C

-

-

-

x

EL3218

< ±0.5 °C

-

-

-

-

EL3692

< ±0.5 % 3)

-

-

-

-

EL3751

< ±0.5 °C for Pt100

< ±0.13 °C for Pt1000

x

x

-

-

EL3751-0004

< ±0.5 °C for Pt100

< ±0.13 °C for Pt1000

x

x

-

-

ELM3244, ELM3246

< ±0.1 °C for Pt100

x

x

-

-

ELM3502

< ±0.07 °C for Pt100

x

x

-

-

ELM3504

< ±0.07 °C for Pt100

x

x

-

-

ELM3702, ELM3704

< ±0.05 °C for Pt100

x

x

-

-

ELM3702-0101

< ±0.1 °C for Pt100

x

x

x

-

EP3204-0002,
EPP3204-0002

< ±0.5 °C (Pt sensors in 4-wire connection)

-

-

-

-

EJ3202

< ±0.5 °C

-

-

-

-

EJ3214

< ±0.5 °C

-

-

-

-

2) If several specifications are shown for a device, the best value is given here; for complete and authoritative specifications, see the respective documentation

3) of the respective full scale value

Continuation:

 

Measured value filtering

Sampling type

Digital resolution

Special

features

KL3201

Various predefined
internal digital filters

simultaneous

16-bit

 

KL3202

Various predefined
internal digital filters

multiplex

16-bit

 

KL3204

Various predefined
internal digital filters

multiplex

16-bit

 

KL3204-0030

Various predefined
internal digital filters

multiplex

16-bit

 

KL3208-0010

Various predefined
internal digital filters

multiplex

16-bit

B parameters possible

KL3228

Various predefined
internal digital filters

multiplex

16-bit

B parameters possible

KL3222

Various predefined
internal digital filters

multiplex

16-bit

for precise measurements; reduced measuring range Pt100: -200..+320 °C

KL3214

Various predefined
internal digital filters

multiplex

16-bit

Siemens S5 data format

EL3201

Various predefined
internal digital filters

simultaneous

16-bit

-

EL3201-0010

Various predefined
internal digital filters

simultaneous

16-bit

for precise measurements; reduced measuring range Pt100 -200..+320 °C
EL3201-0020: with factory working standard calibration certificate
EL3201-0030: with external ISO17025/DAkkS calibration certificate

EL3202

Various predefined
internal digital filters

multiplex

16-bit

-

EL3202-0010

Various predefined
internal digital filters

multiplex

16-bit

for precise measurements; reduced measuring range Pt100 -200..+320 °C
EL3202-0020: with factory working standard calibration certificate
EL3202-0030: with external ISO17025/DAkkS calibration certificate

EL3204

Various predefined
internal digital filters

multiplex

16-bit

-

EL3204-0162

Various predefined
internal digital filters

multiplex

16-bit

additional 2 channels for 12 bit voltage measurement +/-10 V, < ±0.3 %

EL3204-0200

Various predefined
internal digital filters

multiplex

16-bit

for sensor types up to 240 kΩ which otherwise cannot be measured; temperature calculation according to Steinhart-Hart, B-parameter, IEC 60751, free table

EL3208

Various predefined
internal digital filters

multiplex

16-bit

-

EL3208-0010

Various predefined
internal digital filters

multiplex

16-bit

Measuring range limited to -50...+150 °C, NTC possible

EL3214

Various predefined
internal digital filters

multiplex

16-bit

-

EL3214-0090

Various predefined
internal digital filters

multiplex

16-bit

EL3214-0090: TwinSAFE SC

EL3218

Various predefined
internal digital filters

multiplex

16-bit

-

EL3692

Various predefined
internal digital filters

multiplex

24-bit

Autorange
EL3692-0020: with factory working standard calibration certificate
EL3692-0030: with external ISO17025/DAkkS calibration certificate

EL3751

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

EL3751-0020: with factory calibration certificate

EL3751-0004

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

EL3751-0024: with factory calibration certificate

ELM3244, ELM3246

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

multiplex

24-bit

Output in °C/ °F/K possible;

ELM3502

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

Output in °C/ °F/K possible;
ELM3502‑0030: with external ISO 17025/DAkkS calibration certificate

ELM3504

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

Output in °C/ °F/K possible;
ELM3504‑0030: with external ISO 17025/DAkkS calibration certificate

ELM3702, ELM3704

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

Output in °C/ °F/K possible;

ELM3702-0101

Various predefined
internal digital filters
Freely parameterizable with
TwinCAT Filter Designer

simultaneous

24-bit

Output in °C/ °F/K possible;

EP3204-0002,
EPP3204-0002

Various predefined
internal digital filters

multiplex

16-bit

-

EJ3202

Various predefined
internal digital filters

multiplex

16-bit

B parameters possible

EJ3214

Various predefined
internal digital filters

multiplex

16-bit

-

Continuation:

 

RTD connection 4)

Resistance measuring range

RTD sensor types

KL3201

3-wire

0...1200 Ω, 0...5000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000

KL3202

3-wire

0...1200 Ω, 0...5000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000

KL3204

2-wire

0...1200 Ω, 0...5000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000

KL3204-0030

2-wire

0…250 kΩ

NTC10k (Carel characteristic, 0 °C: 27280 Ω)

KL3208-0010

2-wire

0…650 kΩ

Pt1000, Ni1000, NTC

KL3228

1-wire (single-ended)

0…6500 Ω

Pt1000, Ni1000,

KL3222

4-wire

0...1200 Ω, 0...5000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

KL3214

3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3201

3-, 4-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3201-0010

4-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3202

3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3202-0010

4-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3204

2-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3204-0162

2-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3204-0200

2-wire

0 … 6.5/65.5/240 kΩ

various Ni/Pt characteristics, any RTD in the range 100 Ω...240 kΩ

EL3208

2-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3208-0010

2-wire

0...1 kΩ, 0...5 kΩ, 0...10 kΩ
0...1.3 MΩ

Pt1000, Ni1000, NTC 1.8 k/2.2 k/3 k/5 k/10 k/20 k/100 k

EL3214

2-, 3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3214-0090

2-, 3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3218

2-, 3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EL3692

2-, 4-wire

0..0.1 Ω, 0..1 Ω, 0..10 Ω, 0..100 Ω, 0..1 kΩ, 0..10 kΩ, 0..100 kΩ, 0..1 MΩ, 0..10 MΩ

-

EL3751

2-, 3-, 4-wire

0...5 kΩ

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, various KT/KTY

EL3751-0004

2-, 3-, 4-wire

0...5 kΩ

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, various KT/KTY

ELM3244, ELM3246

2-, 3-, 4-wire

0...50 Ω, 0...200 Ω, 0...500 Ω, 0...2 kΩ, 0...5 kΩ

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, various KT/KTY

ELM3502

2-, 3-, 4-wire

not usable

Pt1000

ELM3504

2-, 3-, 4-wire

not usable

Pt1000

ELM3702, ELM3704

2-, 3-, 4-wire

0...50 Ω, 0...200 Ω, 0...500 Ω, 0...2 kΩ, 0...5 kΩ

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, various KT/KTY

ELM3702-0101

2-, 3-, 4-wire

0...50 Ω, 0...200 Ω, 0...500 Ω, 0...2 kΩ, 0...5 kΩ

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, various KT/KTY

EP3204-0002,
EPP3204-0002

2-, 3-, 4-wire

0…4095 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000

EJ3202

2-, 3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

EJ3214

2-, 3-wire

0...1200 Ω, 0...4000 Ω

Pt100, Pt200, Pt500, Pt1000, Ni100, Ni120, Ni1000, KTY

4) if a sensor with fewer lines is to be connected, jumpers must be set on the device