12
FLEX I/O 5V DC TTL Digital Input and Output Modules
Publication 1794-IN119C-EN-P - August 2018
Specifications
Specifications – FLEX I/O 5V DC TTL Input Module 1794-IG16
Attribute
Value
Number of inputs
16, TTL
Recommended terminal base unit
1794-TB3, 1794-TB3S, 1794-TB3K, 1794-TB3SK, 1794-TBKD
On-state voltage, min
0.2V DC
On-state voltage, nom
0V DC
On-state voltage, max
0.8V DC
Off-state voltage, max
2...5.5V DC
Off-state current, max
4.1 mA
Input impedance
1.4 k
Ω
min
1.5 k
Ω
typical
Isolation voltage
50V (continuous), Basic Insulation Type,
Type tested @ 707V DC for 60 s, between field side and system
No isolation between individual channels
Input filter time
(1)
Off to On
On to Off
(1)
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.
Refer to Input Filter Times table
FlexBus current
40 mA @ 5V DC
Power dissipation, max
1.4 W @ 5.5V DC
Thermal dissipation, max
4.78 BTU/hr @ 5.5V DC
IMPORTANT
TTL inputs are inverted
(-0.2…0.8V DC=logic low voltage=1=on
2.0…5.5V DC=logic high voltage=0=off).
Use a NOT instruction in the ladder program to convert to traditional
true=High logic.