Reference: A938
Index: B
Page 102
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Instruction Manual – NPS914 Alarm and Indication IED
9.3. Digital input module (optional)
Figure. 9.3. - 4. Digital input module (DI8) with eight add-on digital inputs.
Connector
Description (x = the number of digital inputs in other modules that preceed this one in the
configuration)
X 1
DIx + 1
X 2
DIx + 2
X 3
DIx + 3
X 4
DIx + 4
X 5
Common earthing for the first four digital inputs.
X 6
DIx + 5
X 7
DIx + 6
X 8
DIx + 7
X 9
DIx + 8
X 10
Common earthing for the other four digital inputs.
The DI8 module is an add-on module with eight (8) galvanically isolated digital inputs. This module can be
ordered directly to be installed into the device in the factory. The properties of the inputs in this module are the
same as those of the inputs in the main processor module. The current consumption of the digital inputs is 2
mA when activated, while the range of the operating voltage is from
0…265 VAC/DC. The activation and
release thresholds are set in the software and the resolution is 1 V. All digital inputs are scanned in 5 ms
program cycles, and their pick-up and release delays as well as their NO/NC selection can be set with
software.
For the naming convention of the digital inputs provided by this module please refer to the chapter titled
"Construction and installation".
For technical details, please refer to the chapter titled "Digital input module" in the "Technical data" section of
this document.
