Specifications

Publication 1794-SG002D-EN-P - May 2012
Select FLEX I/O Modules 29
1794-OB8EP Output Minimum Surge
FLEX I/O Digital DC Diagnostic Modules
1794-IB16D is the diagnostic version of the 1794-IB16.
1794-OB16D is the diagnostic version of the 1794-OB16.
The modules can detect open wire, short circuit, and reverse polarity of external
power. When the module detects a fault, the module fault LED status indicator
lights up, the corresponding red channel LED status indicator lights up, and the
corresponding module error bit (open wire, short circuit, or reverse power bit) is
set. The reporting function provides results of the diagnostics as bits in its data
table.
The modules have 16-bi-color channel LED status indicators and one red
module status indicator. These indicators are driven from the customer field side
power.
Digital DC Diagnostic Input Module
Specification 1794-IB16D
Voltage, on-state input, min 10V DC, sinking
Voltage, on-state input, nom 24V DC
Voltage, on-state input, max 31.2 DC
(1)
Voltage, off-state input, max 5.0V DC
Current, on-state input, nom 8.2 mA @ 24V DC
Current, on-state input, max 12.1 mA @ 31.2V DC
Terminal base unit 1794-TB32, 1794-TB32S
Input impedance, max. 3.1 kΩ
Current, on-state input, min 2.0 mA @ 10V DC
Current, off-state input, max 1.5 mA
Power dissipation, max 8.5 W @ 31.2V DC
Thermal dissipation, max 29 BTU/hr @ 31.2V DC
Detected reverse polarity voltage 10V min
(2)
Sensor voltage drop, max 2.2V DC
Time — ms
Surge Current — A