View Or Edit Mdo Information; Overview - Alcatel-Lucent 1643 AMS User's Operation Manual

Equipment provisioning

View or edit MDO information

Overview

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Purpose
Use this procedure to view and edit MDO names and statuses.
General information
The system provides a number of in- and outputs that can be used to read the status of
external alarm points and to drive external devices. Applications could be: door
contacts and dedicated station alarm loops. These inputs and outputs are called
Miscellaneous Discretes.
The 1643 AM or 1643 AMS is equipped with four Miscellaneous Discrete Inputs
(MDIs) and four Miscellaneous Discrete Outputs (MDOs).
MDOs for the 1643 AM or 1643 AMS have a number of functions:
1. Alarm signaling function:
This is the so called NE-Controlled state. It is initiated if neither of the MDO's
have a label. In this state the MDOs have the following behavior:
• MDO 2 is active if one or more local alarms with severity "PROMPT" are
• MDO 3 is active if one or more local alarms with severity "DEFERRED" are
• MDO 4 is active if one or more local alarms with severity "INFO" are raised
2. External driving function:
From the User Interface (ITM-SC, ITM CIT) each MDO can be activated. When
the system is powered, the contact can be set to active (closed) or inactive (opened)
under control of the ITM-SC or ITM CIT.
3. Fail-Save Alarming function:
Dedicated to MDO1. This contact is closed if the system is not powered.
The MDOs are floating with respect to system ground. An active MDO behaves as a
voltage free resistance of less than 10 Ω between the output connection and its
associated return. It shall be capable of carrying currents of not more than 0.5 A DC.
An inactive MDO behaves as a voltage free resistance of more than 500 kΩ between
the output connection and its associated return. It is capable of withstanding voltages
of not more than 72 V DC.
Contents
Viewing or editing MDO information
Parameters for viewing or editing MDO information
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365-312-807R7.2
Issue 4, May 2007
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raised
Alcatel-Lucent - Proprietary
See notice on first page
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