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Chapter 11: Dataloggers and Predictive Maintenance Systems

Section 1: Dataloggers

11.1.1 Purpose of Dataloggers

(a) To monitor of signalling equipment and to provide real-time alerts/offline
reports for taking necessary action by concerned staff.
(b) Assist in collaborative working of various agencies/persons responsible for
upkeep of signalling system by sharing of data.
(c) To provide Data evidence for investigation of unusual incidences.
(d) To provide Data to Train operation Applications (as required).

11.1.2 Assets for Status Monitoring

The following equipments shall be monitored (not limited to)

(a) Relays – potential free contacts.

(b) Power supplies – voltages, Currents.

(c) Electronic Interlocking – Signalling elements data, Diagnostic data of EI.

(d) Earth leakage detectors for Signal & Power Cables.

(e) Wherever Potential free contacts are available for any signalling equipment
like SPD, fire detection system, IPS etc. the same shall be monitored
through Datalogger.

(f) Diagnostic Data from MSDAC, IPS, Trackside ATP, Fire Alarm etc.

(g) Door Opening/Closing of Relay Rooms.

11.1.3 General Requirements: The Datalogger system shall;

(a) Perform the following functions;

(i) Sensing the parameters of signalling equipments and acquiring diagnostic
data from other processor based equipments.
(ii) Communicating the data to a central location, analyzing the data and
providing actionable decisions as alarm.
(iii) Dissemination of alarms to the concerned staff for taking necessary action.
(iv) To send short messages to concerned staff for taking appropriate actions.

(b) Chronologically monitor and record the status of various field functions like
track circuits, points & signals through their indoor repeater relays,
operator’s push buttons/switches (digital Inputs) and level of various
analog signals like DC and AC supply voltages.

(c) Be capable of receiving both Digital Inputs & Analog Inputs at regular
intervals by scanning them for change of state/Values.

Chapter 11: Dataloggers and Predictive Maintenance Systems Page 220 of 535