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11.3.3 Network Requirements
Communication from IoT device (in station yard near point, signals and other
equipments) to Gateway at station may be on Wireless/Optical fiber/Copper
cable/Wi-Fi communication. Indoor signalling gears will also be suitably
interfaced for monitoring. For communication from Station to Cloud, optical fibre
network with redundancy may be used.

11.3.4 Cloud Based Predictive Maintenance Algorithms

(a) The exchange of information from IoT device to Local server and to
Centralized Cloud shall be on standard format for interoperability between
different systems.

(b) The time synchronization between various IoT devices is an important
requirement for data interpretation in machine learning. For master clock,
the IRNSS (Indian Regional Navigation Satellite System) clock may be
taken for reference at each station.

(c) Transfer of raw data from site using IoT devices to local server at station. The
data from local servers at every station will be sent to centralized cloud. This
data complemented by historical data and trends will be processed using
advance computing through data analytics (Artificial Intelligence/Machine
Learning) to anticipate any issues or failures before they occur.
(d) It is proposed that there may be integrated single cloud for all stations of
Indian Railways. However, if it is not feasible due to any reason, the cloud
can be as per Zonal Railway or a group of Zonal Railways. A mirror cloud
may also be setup for data backup.
(e) An automated alert mechanism will send information to Signal Control of
concerned Division and the concerned maintenance staff over SMS/mobile
app. The monitoring terminals shall display real-time alerts on the screen.

11.3.5 Power Supply Requirement for RDPMS at Station
(a) The power supply for IoT devices near the outdoor equipments shall be taken
from signalling equipment supply with suitable rating fuse, wherever feasible.
Where power is not existing, 24 V DC may be extended from nearby location.

(b) The power supply for IoT devices in Indoor i.e. relay room shall be provided
from 24 V DC of IPS (preferably dedicated module in N+1 configuration).

(c) The power supply for all other equipments i.e. Gateway, Local server, etc. may
be provided from 230 V UPS. The input to UPS shall be from same source of
IPS i.e. selective AT after auto-changeover of IPS. The backup time of UPS to
be decided based on the power-cut duration at particular station.

Note: This Chapter has under mentioned Annexures

S.No Annexure No Description
1 11-A1 Datalogger Fault Logics – An Example
Note: This Chapter has under mentioned Maintenance schedule in Appendix-I
S.No Annexure No Description
2 11-MS1 Maintenance Schedule of Datalogger

Chapter 11: Dataloggers and Predictive Maintenance Systems Page 224 of 535