Spectrum Controls 1794sc-IRT8I - Manual (Page 3)

Install Guide
Publication 0100153‐01 Rev. A (1794sc‐IRT8I) December 2008
Specifications
Number of inputs 8 channels
Module Location Cat. No. 1794-TB3G, 1794-TB3GS
Terminal Base Units
Nominal input voltage ranges ±50 mV, ±100 mV
Supported thermocouple types
Type °C Range °F Range
B 300…1820 °C (572…3308 °F)
C 0…2315 °C (32…4199 °F)
E -270…1000 °C (-454…1832 °F)
J -210…1200 °C (-346…2192 °F)
K -270…1370 °C (-454…2498 °F)
N -210…1300 °C (-346…2372 °F)
R 0…1768 °C (32…3214 °F)
S 0…1768 °C (32…3214 °F)
T -270…400 °C (-454…752 °F)
Supported RTD/Resistance types RTD
100 Ω Pt α = 0.385
-200…850 °C (-328…1562 °F)
200 Ω Pt α = 0.385
-200…850 °C (-328…1562 °F)
500 Ω Pt α = 0.385
-200…850 °C (-328…1562 °F)
1000 Ω Pt α = 0.385
-200…850 °C (-328…1562 °F)
100 Ω Pt α = 0.392
-200…630 °C (-328…1166 °F)
200 Ω Pt α = 0.392
-200…630 °C (-328…1166 °F)
500 Ω Pt α = 0.392
-200…630 °C (-328…1166 °F)
1000 Ω Pt α = 0.392
-200…630 °C (-328…1166 °F)
10 Ω Cu α = 0.426
-100…260 °C (-148…500 °F)
100 Ω Ni α = 0.618
-100…260 °C (-148…500 °F)
120 Ω Ni α = 0.672
-80…260 °C (-112…500 °F)
604 Ω NiFe α = 0.518
-100…200 °C (-148…392 °F)
Resistance
0…150 Ω
0…1000 Ω
0…3000 Ω
Resolution 16 bits
Data format Engineering Units X1
Engineering Units X10
Raw/Proportional Counts
Scaled for PID
Percent of full scale
Input Impedance >1 M Ω for voltage, thermocouple, RTD and
resistance inputs
249Ω +/- 1% for current inputs
Common mode rejection 60 db @ 5V peak-to-peak, 50…60 Hz
Isolation voltage (continuous voltage
withstand rating) User power to Backplane:24 VDC continuous
Channel to Backplane: 24 VDC continuous
Channel to Channel: 24 VDC continuous.
Channel to User power: 24 VDC continuous
Open circuit protection Open circuit detection bias <1 uA with
ON/OFF capability
Overvoltage capability Voltage mode ± 24 VDC continuous (ten
minutes)
Current mode ± 7.8 VDC continuous (ten
minutes)
Cold junction compensation Range -20…100 °C
Cold junction compensator A-B catalog number 1794-CJC2
Flexbus current 80 mA
Power dissipation 6.28 W max @ 31.2V dc
Thermal dissipation Max 10.2 BTU/hr @ 31.2V dc
Keyswitch position 3
Accuracy Specifications
Thermocouple Accuracy
with 4.17 Hz filter
using Linearization per ITS-90 Accuracy
Limit At 25°C
4.17 Hz Filter
Accuracy
Limit At 0-
55°C
4.17 Hz Filter Repeatability
Limit
At 25°C &
4.17 Hz filter
Type J (-50˚C to 1200˚C): ± 0.6 °C ± 2.3 °C ± 0.17 °C
Type J (-210˚C to -50˚C): ± 0.8 °C ± 3.3 °C ± 0.25 °C
Type N (-80˚C to 1300˚C): ± 1.0 °C ± 1.5 °C ± 0.3 °C
Type N (-250˚C to -80˚C): ± 1.2 °C ± 3.0 °C ± 1.9 °C
Type T (-180˚C to 400˚C): ± 1.0 °C ± 1.5 °C ± 0.2 °C
Type T (-270˚C to -180˚C): ± 5.4 °C ± 8.5 °C ± 1.5 °C
Type K (-180˚C to 1370˚C): ± 1.0 °C ± 1.5°C ± 0.3 °C
Type K (-270˚C to -180˚C): ± 7.5 °C ± 11.5 °C ± 3.6 °C
Type E (-130˚C to 1000˚C): ± 0.5 °C ± 1.5 °C ± 0.1°C
Type E (-270˚C to -130˚C): ± 4.2 °C ± 7.3 °C ± 1.2 °C
Type C (0˚C to 2315˚C): ± 1.8 °C ± 3.5 °C ± 0.9 °C
Type B (600˚C to 1800˚C): ± 3.0 °C ± 4.0 °C ± 1°C
Type B (300˚C to 600˚C): ± 3.0 °C ± 8.0 °C ± 2°C
Type S (140˚C to -1760˚C): ± 1.7 °C ± 2.6 °C ± 0.55 °C
Type S (0˚C to 140˚C): ± 1.7 °C ± 5.0 °C ± 1.0 °C
Type R (280˚C to -1760˚C): ± 1.7 °C ± 2.6 °C ± 0.4 °C
Type R (0˚C to 280˚C): ± 1.7 °C ± 5.0 °C ± 1.0 °C
CJC accuracy ± 1.0 °C 3.0 °C ± 0.8 °C
Resistance Accuracy
with 4.17 Hz filter Accuracy
Limit At °25C
Accuracy
Limit At 0-
°55C
Repeatability
Limit
At °25C &
4.17 Hz filter
0-150 ohms range ±0.15 ohms ±0.25 ohms ±10 milliohms
0-1000 ohms range ±1.0 ohms ±2.0 ohms
±100
milliohms
0-3000 ohms range ±1.5 ohms ±2.5 ohms
±100
milliohms
RTD Accuracy
With 4.17 Hz filters Accuracy °C
Limit At °25C
Accuracy °C
Limit At
0°55C
Repeatability
Limit
At °25C &
4.17 Hz filter
Platinum 385 (100, 200, 500 and
1000 ohms) (IEC751 1983, Amend
2 1995; JISC 1604 1997)
± 0.7 °C ± 1.2 °C ± 0.1 °C
Platinum 3916 (100, 200, 500 and
1000 ohms) (JISC 1604: 1981)
± 0.6 °C ± 1.1 °C ± 0.1 °C
Nickel 618 (100 ohms) (DIN 43760
Sept. 1987)
± 0.3 °C ± 0.5 °C ± 0.1 °C
Nickel 672(120 ohms) (DIN 43760
Sept. 1987)
± 0.3 °C ± 0.5 °C ± 0.1 °C
Nickel-Iron (518) (MINCO
Application Aid #18,Date 5/90)
± 0.4 °C ± 0.7 °C ± 0.1 °C
Copper 426 (10 ohms) (SAMA
RC21-4-1966)
± 2.0 °C ± 2.4 °C ± 0.1 °C
General Specifications
Voltage range
Supply current 24V dc nom
240 mA @ 24V dc
Dimensions (with module installed in base)
HxWxD approx. 94 x 94 x 69 mm
(3.7 x 3.7 x 2.7 in.)
Environmental Conditions
Temperature, operating 0…55 °C (-32…131 °F)
Temperature, storage –40…85 °C (–40…185 °F)
Relative humidity
IEC 60068-2-30 (Test Db,
Unpackaged Damp Heat):
5…95% non-condensing
Vibration
IEC60068-2-6 (Test Fc, Operating):
5 g @ 10…500Hz
Shock
Operating
Non-operating
IEC60068-2-27 (Test Ea,
Unpackaged shock):
20 g
25 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:
10 V/m with 1 kHz sine-wave 80%
AM from 30…2000 MHz
10 V/m with 200 Hz 50% Pulse
100% AM at 900 MHz
10 V/m with 200 Hz 50% Pulse
100% AM at 1890 MHz
EFT/B immunity
IEC 61000-4-4:
±2 kV at 5 kHz on signal ports
Surge transient immunity
IEC 61000-4-5:
±2 kV line-earth (CM) on shielded
ports
Conducted RF immunity
IEC 61000-4-6:
10V rms with 1 kHz sine-wave 80%
AM from 150 kHz…80 MHz
Enclosure type rating None (open-style)
Signal conductors
Thermocouple
Millivolt
Category
(1)
Use appropriate shielded
thermocouple wire
(3 )
Belden 8761 2 - on signal ports
Power conductors
Wire size
Category
(1)
0.34…2.5 mm
2 (22…12 AWG) solid
or stranded copper wire rated
at 75 °C (167 °F) or greater
1.2 mm (3/64 in.) insulation max
3 - on power ports
Terminal screw torque for cage-clamp
terminal base 0.8 Nm (7 lb-in.)
Certifications (when product is marked) (2) UL Listed for Class I, Division 2
Group A,B,C,D Hazardous
Locations, certified for U.S. and
Canada. See UL File
E180101.
UL
Listed Industrial Control
Equipment, certified for U.S.
and Canada. See UL File E140954.
EEx
European Union 94/9/EEC
ATEX Directive, compliant with:
EN 60079-15; Potentially Explosive
Atmospheres,
Protection II 3 G nA IIC T5
CE
European Union 89/336/EEC
EMC Directive,
compliant with:
EN 61000-6-4; Industrial Emissions
EN 50082-2; Industrial Immunity
EN 61326; Meas./Control/Lab.,
Industrial Requirements
EN 61000-6-2; Industrial Immunity
EN 61131-2; Programmable
Controllers
(Clause 8, Zone A & B)
(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) For the latest up-to-date information, see the Product Certification link at www.spectrumcontrols.com
for Declarations of Conformity, Certificates and other certification details.
(3) Refer to the thermocouple manufacturer for proper thermocouple extension.