5
Publication 1794-IN102B-EN-P - June 2004
Specifications
Specifications 1794-IA8, 1794-IA8K 1794-IA8I
Number of Inputs 8, (1 group of 8), nonisolated 8 isolated
Module Location Cat. No. 1794-TB2, -TB3, -TB3S and -TBN Terminal Base Units
On-state Voltage 65V ac minimum
120V ac nominal
132V ac maximum
On-state Current
1
7.1mA minimum
Off-state Voltage 43V ac maximum
Off-state Current 2.9mA minimum
Input Impedance 10.6K ohms nominal
Nominal Input Current 12mA @ 120V ac, 60Hz
Isolation Voltage Tested at 2150V dc for 1s between
user and system
No isolation between individual
channels
Tested at 2150V dc for 1s between
user and system and between
individual channels
Input Filter Time Refer to Input Filter Time table
Flexbus Current 30mA @5V dc
Power Dissipation 4.5W maximum @ 132V ac
Thermal Dissipation Maximum 15.3 BTU/hr @ 132V ac
Specifications - Cat. No. 1794-IA16
Number of Inputs 16 (1 group of 16), nonisolated
Module Location Cat. No. 1794-TB3, -TB3S and -TBN Terminal Base Units
On-state Voltage 74V ac minimum
120V ac nominal
132V ac maximum
On-state Current
1
minimum
nominal
maximum
5.49mA @ 74V ac, 47Hz
12.06mA @ 120V ac, 60Hz
14.81mA @ 132V ac, 63Hz
Off-state Voltage 20V ac maximum
Off-state Current 2.9mA minimum
Nominal Input Impedance 10K ohms
Nominal Input Current 12mA @ 120V ac, 60Hz
Isolation Voltage Tested at 2150V dc for 1s between user and system
No isolation between individual channels
Flexbus Current 20mA
Power Dissipation 6.4W maximum @ 132V ac
Thermal Dissipation Maximum 21.8 BTU/hr @ 132V ac
General Specifications
Input Filter Time
2
Off to On
On to Off
Refer to Input Filter Time chart for values.
Terminal Base Screw
Torque
7 pound-inches (0.8Nm)
9 pound-inches (1.0Nm) for 1794-TBN
Dimensions (with module
installed)
3.7H x 3.7W x 2.7D inches
94H x 94W x 69D mm
Indicators (field side
indication, customer
device driven)
1794-IA8, -IA8K - 8 yellow status indicators
1794-IA8I - 8 yellow status indicators
1794-IA16 - 16 yellow status indicators
External ac power
Supply voltage
Voltage range
120V ac nominal
1794-IA8, -IA8K, -IA8I - 85 to 132V ac, 47-63Hz
1794-IA16 - 74 to 132V ac, 47-63Hz
Keyswitch Position 8
Environmental Conditions
Operating
Temperature
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):
0 to 55°C (32 to 131°F)
Storage Temperature IEC 60068-2-1 (Test Ab, Un-packaged Non-operating Cold),
IEC 60068-2-2 (Test Bb, Un-packaged Non-operating Dry Heat),
IEC 60068-2-14 (Test Na, Un-packaged Non-operating Thermal
Shock):
–40 to 85°C (–40 to 185°F)
Relative Humidity IEC 60068-2-30 (Test Db, Un-packaged Non-operating
Damp Heat):
5 to 95% non-condensing
Vibration IEC60068-2-6 (Test Fc, Operating):
5g @ 10-500Hz
Shock IEC60068-2-27 (Test Ea, Unpackaged shock):
Operating 30g
Non-operating 50g
Emissions CISPR 11:
Group 1, Class A (with appropriate enclosure)
ESD Immunity IEC 61000-4-2:
4kV contact discharges
8kV air discharges
Radiated RF Immunity IEC 61000-4-3:
10V/m with 1kHz sine-wave 80%AM from 30MHz to 1000MHz
10V/m with 200Hz 50% Pulse 100% AM at 900Hz
EFT/B Immunity IEC 61000-4-4:
±2kV at 5kHz on signal ports
±2kV at 5kHz on power ports
Surge Transient
Immunity
IEC 61000-4-5:
±1kV line-line(DM) and ±2kV line-earth(CM) on signal ports
±1kV line-line(DM) and ±2kV line-earth(CM) on power ports
Conducted RF
Immunity
IEC 61000-4-6:
10Vrms with 1kHz sine-wave 80%AM from 150kHz to 80MHz
Enclosure Type Rating None (open-style)
Conductors Wire Size
Category
3
12-22AWG (2.5mm
2
-0.34mm
2
) stranded copper wire rated at 75°C
or higher
3/64 inch (1.2mm) insulation maximum
2
Certifications (when
product is marked)
4
UL UL Listed Industrial Control Equipment
CSA CSA certified for Class I, Division 2, Groups A, B, C and D
Hazardous locations
EEx
5
European Union 94/9/EEC ATEX Directive, compliant with:
EN 50021; Potentially Explosive Atmospheres,
Protection “n” (European Zone 2) - (1794-IA8K only)
CE
4
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
European Union 73/23/EEC LVD Directive, compliant with:
EN 61131-2; Programmable Controllers
C-Tick
4
- Australian Radiocommunications Act compliant with
AS/NZS CISPR 11, Industrial Emissions
1 Ac inputs compatible with proximity switches with leakage ratings of I
leak
< 2.5mA and I
on
minimum = 5mA.
2 Input off-to-on filter time is the time from a valid input signal to recognition by the module. Input on-to-off filter
time is time from the input signal dropping below the valid level to recognition by the module.
3 You use this category information for planning conductor routing as described in Allen-Bradley
publication 1770-4.1, Industrial Automation Wiring and Grounding Guidelines.
4 For the latest up-to-date information, see the Product Certification link at www.ab.com for Declarations of
Conformity, Certificates and other certification details. For notification of any additional release notes, refer to
www.ab.com/manuals/.
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