Refer to document 12P3292, DeltaV Type KJ7000 Series Zone 1 I/O System Installation Instructions for the Discrete Input channels' entity parameters. This document can be found on the DeltaV Documentation Library DVD. This document is in Portable Document Format (.PDF). A letter (A-Z) is appended to the filename and is incremented for each release of the document.
NAMUR sensors and line fault detection
- Compatibility with NAMUR Sensors: NAMUR sensors that are designed to operate within an excitation voltage range of 5 to 18 V are compatible with the I.S. discrete input dry contact channels.
- Line Fault Detection: The
I.S. discrete input dry contact channels have line fault detection for
detecting open or short circuits in field wiring. To use this capability you
must:
- Enable line fault detection in your configuration. Enable line fault detection on a channel-by-channel basis when you configure the channels.
- Connect the dry
contact to external resistors. Connect the dry contact to a 6.8 KΩ resistor in
parallel (allows the open circuit detection) and a 1 KΩ resistor in series
(allows short circuit detection).
- Line Fault Detection in NAMUR Sensors: Line fault detection is built into NAMUR sensors. Do not use external resistors with NAMUR sensors; however, you must enable line fault detection in your configuration when using NAMUR sensors.
