Rockwell-automation 1794-IRT8XT/B TC/MV/RTD Input Module Installation Instrukcja Użytkownika Pobierz pdf (Strona 5)

Publication 1794-IN050J-EN-P - January 2009

FLEX I/O and FLEX I/O-XT are trademarks of Rockwell Automation.

Accuracy vs. filter cutoff 0.05% of full range in millivolt mode with filtering selected

Hardware only = 0.10% of full range in millivolt mode

Data format °C (implied decimal point XXX.X)

°F (implied decimal point XXX.X)

°K (implied decimal point XXX.X)

-32767…32767

0…65535

0…5000 (ohms mode) (implied decimal point XXX.X)

-4000…+10000 (millivolt mode) (implied decimal point XXX.XX)

Common mode rejection -80 db @ 5V peak-to-peak, 50…60 Hz

Common mode input

range

+15V min

Isolation voltage

(continuous voltage

withstand rating)

50V (continuous), Basic Insulation Type

Type tested at 1365V AC for 60 s, between field side and system

No isolation between individual channels"

System throughput (8

channels scanned) - Add

0.5 ms if filtering is

selected

Typical module timing is shown here.

7.4 ms - millivolt

8.0 ms - Ω - 2-wire RTD

10.0 ms - Ω - 3-wire RTD

10.4 ms - Ω - 4-wire RTD

8.0 ms - 2-wire RTD (°F)

10.4 ms - 4-wire RTD (°F)

8.8 ms - 2-wire RTD (°C), (°K)

10.8 ms - 4-wire RTD (°C), (°K)

9.8 ms - 3-wire RTD (°F)

10.0 ms - 3-wire RTD (°C), (°K)

9.0 ms - Thermocouples (°F)

9.4 ms - Thermocouples (°C), (°K)

Open circuit protection RTD mode - Open input - Module defaults to max value

TC mode - Open input - Module defaults to min value

To simulate wire-off detection in Series A TC mode when using a Series B

module, attach a jumper from terminal 39 to terminal 48 on the 1794-TB3G,

1794-TB3GS, or 1794-TB3GK terminal base unit so that an open input will

default to max value.

Open input detection

time

Immediate detection (max 2 scans)

Overvoltage capability 15V DC continuous at 25 °C

Overall drift with

temperature

50 ppm/°C of span (max)

Cold junction

compensation Range

-20…100 °C

Cold junction

compensator

A-B catalog number 1794-CJC2

Indicators 1 green power status indicator

8 red open input indicators

Flexbus current 40 mA

Power dissipation 3.0 W max @ 31.2V DC

Thermal dissipation Max 10.2 BTU/hr @ 31.2V DC

Keyswitch position 3

General Specifications

External DC power

supply voltage

Voltage range

Supply current

24V DC nom

19.2…31.2V DC (includes 5% AC ripple)

95 mA @ 24V DC

ATTENTION: To comply with the CE Low Voltage Directive (LVD), all connections

to this equipment must be powered from a source compliant with the following:

Safety Extra Low Voltage (SELV) or Protected Extra Low Voltage (PELV).

Dimensions (with

module installed in

base) HxWxD approx.

94 x 94 x 69 mm

(3.7 x 3.7 x 2.7 in.)

Temperature code, IEC T4

Temperature code,

North American

T4A

Enclosure type rating None (open-style)

Wire size Determined by installed terminal base

Signal conductors

Thermocouple

Millivolt

Wire type

Use appropriate shielded thermocouple wire

(3)

Belden 8761

Shielded on signal ports

Wiring category

(1)

2 - on signal ports

3 - on power ports

Terminal screw torque

for cage-clamp terminal

base

Determined by installed terminal base

Environmental Specifications

Temperature,

operating

IEC 60068-2-1 (Test Ad, Operating Cold),

IEC 60068-2-2 (Test Bd, Operating Dry Heat),

IEC 60068-2-14 (Test Nb, Operating Thermal Shock):

-20…55 °C (-4…131 °F) (1794-IRT8, 1794-IRT8K)

-20…70 °C (-4…158 °F) (1794-IRT8XT)

Temperature, non-

operating

IEC 60068-2-1 (Test Ab, Unpackaged Non-operating Cold),

IEC 60068-2-2 (Test Bb, Unpackaged Non-operating Dry Heat),

IEC 60068-2-14 (Test Na, Unpackaged Non-operating Thermal Shock):

-40…85 °C (-40…185 °F)

Relative humidity IEC 60068-2-30 (Test Db, Unpackaged Damp Heat):

5…95% noncondensing

Vibration IEC 60068-2-6 (Test Fc, Operating):

5 g @ 10…500 Hz

Shock

operating

nonoperating

IEC60068-2-27 (Test Ea, Unpackaged shock):

30 g

50 g

Emissions CISPR 11:

Group 1, Class A (with appropriate enclosure)

ESD immunity IEC 61000-4-2:

6 kV contact discharges

8 kV air discharges

Radiated RF

immunity

IEC 61000-4-3:

10V/m with 1 kHz sine-wave 80% AM from 80…2000 MHz

10V/m with 200 Hz 50% Pulse 100% AM at 900 MHz

10V/m with 200 Hz 50% Pulse 100% AM at 1890 MHz

3V/m with 1 kHz sine-wave 80% AM from 2000…2700 MHz

EFT/B immunity IEC 61000-4-4:

±2 kV at 5 kHz on power ports

±2 kV at 5 kHz on shielded signal ports

Surge transient

immunity

IEC 61000-4-5:

±2 kV line-earth(CM) on shielded signal ports

Conducted RF

immunity

IEC 61000-4-6:

10V rms with 1 kHz sine-wave 80% AM from 150 kHz…80 MHz on shielded

signal ports

Certifications (when product is marked)

(2)

C-UL-US UL Listed Industrial Control Equipment, certified for US and Canada. See UL File

E65584.

UL Listed for Class I, Division 2 Group A,B,C,D Hazardous Locations, certified for

U.S. and Canada. See UL File E194810.

European Union 2004/108/EC EMC Directive, compliant with:

EN 61326-1; Meas./Control/Lab., Industrial Requirements

EN 61000-6-2; Industrial Immunity

EN 61000-6-4; Industrial Emissions

EN 61131-2; Programmable Controllers (Clause 8, Zone A & B)

C-Tick Australian Radiocommunications Act, compliant with:

AS/NZS CISPR 11; Industrial Emissions

Ex European Union 94/9/EC ATEX Directive, compliant with:

EN 60079-15; Potentially Explosive Atmospheres, Protection "n" (II 3 G Ex nA IIC

T4 X)

EN 60079-0; General Requirements (Zone 2)

TUV TÜV Certified for Functional Safety:

up to and including SIL 2

(1)

Use this category information for planning conductor routing as described in Industrial Automation Wiring and

Grounding Guidelines, Allen-Bradley publication 1770-4.1.

(2)

See the Product Certification link at www.ab.com for Declarations of Conformity, Certificates, and other

certification details.

(3)

Refer to the thermocouple manufacturer for proper thermocouple extension.

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