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B&R X20ST4492

I/O module, 2x 2 safe analog inputs for thermocouples

MPN: X20ST4492
Category: Analog input modules

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12-month warranty (new) · 3-month (used/refurbished)
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What is the B&R X20ST4492?

2 safe analog input pairs for thermocouples

For sensor types J, K, N, S, R, C, T, raw value measurement

1 safe analog input pair for resistance temperature measurement

For PT100 and PT1000

Configurable sensor type per channel

24-bit digital converter resolution

Galvanically isolated analog channel pairs

Input filter configurable

Integrated terminal temperature compensation

2x PT1000 sensor integrated in the terminal (X20TB5E)

2x external PT1000 sensor can be connected (X20TB5F)

The module is equipped with 2 safe analog input pairs for J, K, N, S, R, C and T thermocouple sensors and 1 safe analog input pair for PT100/PT1000 resistance temperature measurement.

The safe temperature module is suitable for safely acquiring temperatures for safety-related applications up to PL e or SIL 3.

This module is designed for X20 16-pin terminal blocks.

Specifications

Short description

I/O module

2x 2 safe analog inputs for thermocouples, 1x 2 safe analog inputs for PT100/PT1000 sensors, channel pairs galvanically isolated, integrated terminal temperature compensation, integrated temperature sensor in terminal block X20TB5E

General information

Diagnostics – Module run/error	Yes, using LED status indicator and software
Diagnostics – Inputs	Yes, using LED status indicator and software
Blackout mode – Scope	Module
Blackout mode – Function	Module functionality
Blackout mode – Standalone mode	No
Power consumption – Bus	0.25 W
Power consumption – Internal I/O	1.2 W
Electrical isolation – Channel - Bus	Yes
Electrical isolation – Channel - Channel	No
Electrical isolation – Channel pair - Channel pair	Yes
Certifications – CE	Yes
Certifications – UKCA	Yes
Certifications – CRA (Cyber Resilience Act)	In preparation
Certifications – Functional safety	cULus FSPC E361559; Energy and industrial systems; Certified for functional safety; ANSI UL 1998:2013
Certifications – Functional safety	IEC 61508, up to SIL 3 ; IEC 62061, up to SIL 3 ; ISO 13849-1, up to Cat. 4 / PL e ; IEC 61511, up to SIL 3
Certifications – Functional safety	EN 50156-1
Certifications – ATEX	Zone 2, II 3G Ex nA nC IIA T5 Gc; IP20, Ta (see X20 user's manual); FTZÚ 09 ATEX 0083X
Certifications – UL	cULus E115267; Industrial control equipment; cULus E537419; Engine generator controller
Certifications – HazLoc	cCSAus 244665; Process control equipment; for hazardous locations; Class I, Division 2, Groups ABCD, T5
Certifications – DNV	Temperature: A (0 to 45°C); Humidity: B (up to 100%); Vibration: A (0.7 g); EMC: B (bridge and open deck)
Certifications – CCS	Yes
Certifications – LR	ENV1
Certifications – KR	Yes
Certifications – ABS	Yes
Certifications – BV	EC21B ; Temperature: 5 - 45°C; Vibration: 0.7 g; EMC: Bridge and open deck
Certifications – KC	Yes
B&R ID code	0xB419
Status indicators	I/O function per channel, operating state, module status
Additional power dissipation caused by actuators (resistive) [W]	-

Safety characteristics

Note	See section "Safety characteristics".

I/O power supply

Nominal voltage	24 VDC
Voltage range	24 VDC -15% / +20%

Thermocouple temperature inputs

Measurement range – Type J: Fe-CuNi	-210.0 to 1200.0°C
Measurement range – Type K: NiCr-Ni	-270.0 to 1372.0°C
Measurement range – Type N: NiCrSi-NiSi	-270.0 to 1300.0°C
Measurement range – Type S: PtRh10-Pt	-50.0 to 1768.0°C
Measurement range – Type R: PtRh13-Pt	-50.0 to 1768.0°C
Measurement range – Type C: WRe5-WRe26	0 to 2320.0°C
Measurement range – Type T: Cu-CuNi	-270.0 to 400.0°C
Measurement range – Voltage	±65 mV
Measurement range – Max. internal resistance of source during voltage measurement	20 Ω
Resolution – Sensor temperature	1 LSB = 0.1°C
Resolution – Voltage	1 LSB = 2 µV
Basic accuracy – Type J: Fe-CuNi	1.41°C (note: At 25°C)
Basic accuracy – Type K: NiCr-Ni	1.81°C (note: At 25°C)
Basic accuracy – Type N: NiCrSi-NiSi	1.73°C (note: At 25°C)
Basic accuracy – Type S: PtRh10-Pt	3.10°C (note: At 25°C)
Basic accuracy – Type R: PtRh13-Pt	3.10°C (note: At 25°C)
Basic accuracy – Type C: WRe5-WRe26	3.48°C (note: At 25°C)
Basic accuracy – Type T: Cu-CuNi	0.74°C (note: At 25°C)
Basic accuracy – Voltage	78 µV (note: At 25°C)
Max. offset drift – Type J: Fe-CuNi	0.0297°C per °C
Max. offset drift – Type K: NiCr-Ni	0.0427°C per °C
Max. offset drift – Type N: NiCrSi-NiSi	0.0471°C per °C
Max. offset drift – Type S: PtRh10-Pt	0.1637°C per °C
Max. offset drift – Type R: PtRh13-Pt	0.1455°C per °C
Max. offset drift – Type C: WRe5-WRe26	0.1068°C per °C
Max. offset drift – Type T: Cu-CuNi	0.0335°C per °C
Max. offset drift – Voltage	1.69 µV per °C
Terminal temperature compensation – Accuracy of internal terminal temperature	15°C at static temperatures and during safe operation
Common-mode rejection – DC	>70 dB
Common-mode rejection – 50 Hz	>70 dB
Safety-related accuracy per channel – Type J: Fe-CuNi	35.25°C
Safety-related accuracy per channel – Type K: NiCr-Ni	47.62°C
Safety-related accuracy per channel – Type N: NiCrSi-NiSi	51.81°C
Safety-related accuracy per channel – Type S: PtRh10-Pt	150.90°C
Safety-related accuracy per channel – Type R: PtRh13-Pt	134.54°C
Safety-related accuracy per channel – Type C: WRe5-WRe26	111.36°C
Safety-related accuracy per channel – Type T: Cu-CuNi	30.82°C
Safety-related accuracy per channel – Voltage	2080 µV
Quantity	2 safe input channel pairs
Variant	Type thermocouple
Digital converter resolution	24-bit
Filter time	Configurable between 1 and 66.7 ms
Output format	SAFEINT
Terminal temperature compensation	Internal / External
Sensor standard	EN 60584
Conversion procedure	Sigma-delta
Linearization method	Internal
Permissible input signal	Max. ±1 V
Input filter	First-order low-pass filter / cutoff frequency 500 Hz
Max. gain drift	0.013 %/°C (note: Based on the measured value)
Common-mode range	±4 V within channel pair, ±50 V between 2 channel pairs
Crosstalk between channels	≤70 dB
Insulation voltage between channel and bus	500 VDC

Resistance measurement temperature inputs

Measurement range – Pt100	-200.0 to 850.0°C
Measurement range – Pt1000	-200.0 to 850.0°C
Basic accuracy – Pt100	1.89°C (note: At 25°C)
Basic accuracy – Pt1000	0.53°C (note: At 25°C)
Max. offset drift – Pt100	0.0525°C per °C
Max. offset drift – Pt1000	0.0053°C per °C
Temperature sensor resolution – Pt100	1 LSB = 0.1°C
Temperature sensor resolution – Pt1000	1 LSB = 0.1°C
Input filter – Cutoff frequency	500 Hz first-order
Safety-related accuracy per channel – Pt100	12.60°C
Safety-related accuracy per channel – Pt1000	8.93°C
Quantity	1 safe input channel pair
Variant	Type PT100/PT1000
Measuring current	262 µA ±5%
Max. gain drift	0.004 %/°C (note: Based on the measured value)
Max. line length	50 m
Max. line resistance	5 Ω

Operating conditions

Mounting orientation – Horizontal	Yes
Mounting orientation – Vertical	Yes
Installation elevation above sea level	0 to 2000 m, no limitation
Degree of protection per EN 60529	IP20

Ambient conditions

Temperature – Horizontal mounting orientation	0 to 60°C
Temperature – Vertical mounting orientation	0 to 50°C
Temperature – Derating	See section "Derating".
Temperature – Storage	-40 to 85°C
Temperature – Transport	-40 to 85°C
Relative humidity – Operation	5 to 95%, non-condensing
Relative humidity – Storage	5 to 95%, non-condensing
Relative humidity – Transport	5 to 95%, non-condensing

Mechanical properties

Note	Order 1x safety-keyed terminal block separately.; Order 1x safety-keyed bus module separately.
Pitch	25 +0.2 mm

Accessories

Required accessories (order separately)

X20BM36	Bus modules — Bus module for SafeIO modules; The internal I/O power supply is continuous.; Manual node number assignment; Independent from the electronic…
X20BM33	Bus modules — Bus module for SafeIO modules; The internal I/O power supply is continuous. The bus module is the base for all SafeIO modules. The internal…
X20TB5F	Terminal blocks — Tool-free wiring using push-in technology; Simple wire release using a screwdriver; Labeling option for each terminal connection; Plain tex…
X20TB5E	Terminal blocks — Integrated terminal temperature compensation; Tool-free wiring using push-in technology; Simple wire release using a screwdriver; Labeling…

Downloads & documentation

Official documents from B&R, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (21)

X20ST4492: frequently asked questions

When can X20ST4492 be shipped?

X20ST4492 is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up X20ST4492 in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for X20ST4492 and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for X20ST4492, subject to availability and destination.