Reference: A938
Index: B
Page 97
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Instruction Manual – NPS914 Alarm and Indication IED
9. Construction and installation
9.1. Construction
NPX914 is a member of the modular and scalable NP900 series, and it includes six (6) configurable and
modular add-on card slots. As a standard configuration the device includes the CPU module (which
consists of the CPU, a number of inputs and outputs, and the power supply).
The images below present the modules of both the non-optioned model (NPX914-XXXXXXX-AAAAAA,
on the left) and the fully optioned model (NPX914-XXXXXXX-BBBBCC, on the right).
Figure. 9.1. - 1. Modular construction of NPX914.
The modular structure of NPX914 allows for scalable solutions for different application requirements. In non-
standard configurations Slots A, B, C, D, E and F accept all available add-on modules, such as digital I/O
modules or a special module. The only difference between the slots affecting device scalability is that Slot
F also supports communication options.
When an add-on module is inserted into the device, the start-up scan searches for modules according to
their type designation code. If the module location or content is not what the device expects, the IED does
not take additional modules into account and instead issues a configuration error message. In field
upgrades, therefore, the add-on module must be ordered from ICE or its representative who can then
provide the module with its corresponding unlocking code to allow the device to operate correctly once the
hardware configuration has been upgraded. This also means that the module's location in the device
cannot be changed without updating the device configuration data which, again, requires the unlocking
code.
