Specifications

Publication 1794-SG002D-EN-P - May 2012
88 Select FLEX Ex I/O Modules
Modules Specifications
The following section shows more detailed module specifications in comparative
groups to facilitate your selection based on your requirements.
1797-IBN16 16 Point Non-isolated NAMUR Input Module
• Fault detection, fault bits in data table and status indicator LED (per
channel) blinking red (1 Hz)
• Lead breakage defeat on four-channel group basis via module DIP switch
selection
• Fault detection can be disabled via data table
• Programmable digital input filtering 1…33 ms (OFF to ON and ON to
OFF)
• All channels updated to FlexBus ≤ 500 μs
• Compatible with NAMUR sensors and dry contacts
Schematic drawing of the 1797-IBN16 module
lead break defeat
Power supply
+
-
NAMUR prox
Bus
μC
FlexBus
16 Point Non-isolated NAMUR Input Module
Specification 1797-IBN16
Number of inputs 16
Input type EN 60947-5-6, NAMUR compatible
Current, on-state input, min 2.1 mA
Current, off-state input, max 1.2 mA
Hysteresis 0.2 mA
Input frequency, max 1000 Hz
Input pulse width ≥25μs for on or off
Load voltage, max U/V = 7.5V DC
Short circuit current 7.5 mA
Short circuit threshold current > 6 mA
Lead breakage threshold current ≤ 0.15 mA
Input delay time, OFF to ON 1 ms, 2 ms, 3 ms, 5 ms, 9 ms, 17 ms, 33 ms
(1)
Input delay time, ON to OFF 1 ms, 2 ms, 3 ms, 5 ms, 9 ms, 17 ms, 33 ms
(2)