Specifications
Publication 1794-SG002D-EN-P - May 2012
20 Select FLEX I/O Modules
Modules Specifications
The following section shows more detailed module specifications in comparative
groups to facilitate your selection based on your requirements.
FLEX I/O Digital AC Input Modules
Digital AC Input Comparison
Specification 1794-IA8, 1794-IA8I 1794-IA16 1794-IM8 1794-IM16
Voltage, on-state input, nom 120V AC
(1)
240V AC
Terminal base unit 1794-TBN, 1794-TB2, 1794-TB3,
1794-TB3S, 1794-TBKD,
1794-TB3K, 1794-TB3SK,
1794-TBNK
1794-TB3, 1794-TB3S,
1794-TBN
(2)
, 1794-TB3K,
1794-TB3SK, 1794-TBNK
1794-TBN, 1794-TBNK
Current, on-state input, nom 12 mA @ 120V AC, 60 Hz 10 mA @ 240V AC, 60 Hz 11 mA @ 240V AC, 60 Hz
Input impedance, nom 10.6 kΩ 10 kΩ 22.3 kΩ 22.2 kΩ
Voltage, on-state input, min 65V AC 74V AC 159V AC
Voltage, off-state input, max 43V AC 20V AC 40V AC
Current, on-state input, min 7.1 mA 5.5 mA @ 74V AC, 47 Hz 5.3 mA @ 159V AC, 47 Hz
Current, off-state input, max 2.9 mA 2.6 mA
Power dissipation, max 4.5 W @ 132V AC 6.4 W @ 132V AC 4.7 W @ 264V AC 6 W @ 264V AC
Thermal dissipation, max 15.3 BTU/hr @ 132V AC 21.8 BTU/hr @ 132V AC 16.2 BTU/hr @ 264V AC 20.47 BTU/hr @ 264V AC
Dimensions (HxWxD) 46 x 94 x 53 mm (1.8 x 3.7 x 2.1 in.)
94 x 94 x 69 mm (3.7 x 3.7 x 2.7 in.) installed
Isolation voltage 120V (continuous), Basic
Insulation Type
Type tested at 1250V AC (1240V
for 1794-IA8I) for 60 s, between
field side and system
No isolation between individual
channels
Routine tested to 2150V DC for
1 s, between field side and
system
No isolation between individual
channels
120V (continuous), Basic
Insulation Type
Type tested at 1264V AC
for 60 s, between field
side and system
No isolation between
individual channels
Routine tested at 2150V
DC for 1 s, between field
side and system
No isolation between
individual channels
250V (continuous), Basic Insulation Type, field side to
backplane
No isolation between individual channels
Type tested at 1250V AC for 60 s
(1) 1794-IA8I – isolated voltage
(2) Auxiliary terminal strips are required when using the 1794-TBN.