Water Resources Department Tender

Local HMI Facilities ֎ The remote PLC system shall be equipped with adequate operator panel to enable monitoring and control for the operator at the Reservoir level. ֎ The operator panel shall be preferably accomplished by means of LED/LCD backlit display of 7 inches or above at Local Control Stations & 12 inches at Integrated Central Command PLC controller. ֎ The graphical LED/LCD should be easily detachable such that its failure does not affect the PLC functionality. ֎HMI functionality shall be capable of presenting customized views with key process variables presented as digital and graphical data. ֎ The HMI shall provide the ability to navigate from control screen to control screen or to navigate via navigation buttons or similar graphical device on the current screen. ֎The HMI software must support real-time and historical trend graphic displays as part of a display. ֎ The HMI software shall provide the capability to provide popup windows for device control, trends and device status pages ֎ HMI shall support parameterization and Configuration settings through its display at local PLC Station. ֎ Degree of protection: Front: IP 65 & Rear: IP 20. Any Cable / Wiring work the external protoction arrangements should be ensured Complete complying with standard specification and as directed by engineer in charge. ( As per Quotation Rate )

֎The PLC shall be capable of monitoring and controlling the temperature inside the panel and shall transmit the following information to the central control room. ֎ Panel Temperature o Status of cooling fans c. Power Supply Scheme Protection shall be provided in the input side of the mains power supply as follows; (i) Input mains Fault Protection: MPCB of suitable ratings shall be provided by supplier for mains power supply fault level protection. The mains input shall be protected using MPCB (with adjustable current limiting) and auxiliary signalling contact. Auxiliary signalling contacts shall monitor the Healthy/Trip condition of the MPCB. The signalling contact status information shall be updated in the control room. (ii) PLC can be provided with Isolation transformer for 415 to 230 Vac. Also, the relay board/contactor switches to be installed in motor starter panels for acquiring the status of electrical parameters shall be from reputable manufacturers with better stand ability against voltage fluctuations. (iii) Control Voltage: The proposed PLC system control power supply voltage shall be 24V-48VDC and the same shall be derived with the use of SMPS Power Supply Unit. The SMPS input power shall be protected with suitable MCB. The power to the input of the SMPS shall be switched ON/OFF from the PLC through Auxiliary relay contact. The panel control switch gear, PLC unit, Communication unit, HMI Screen Panel, indication lamp, hooter, instruments, Auxiliary Relays, Signal Conditioners/isolators, etc. shall be energized by control voltage of 24V -48V DC. d. Power Supply On/Off ֎ All the field instruments integrated with each remote PLC, shall be connected to the single power supply bus and energized with the control voltage supply of 24 - 48 VDC. The PLC according to the application program (periodically) shall switch OFF the control voltage supply via the DC contactor, and Switch ON the control voltage supply after a programmable time delay by actuating the DC Power contactor and the use of programmable mechanical/electrical timer switch gear unit automatically to clear the memory and other floating memory locations errors, warning, faults, etc.

Supply, Transportation, Installation, Testing and Commissioning Programmable Logic Controllers CPUs with memory, integrated digital & analouge I/Os, Communication modules etc. Remote PLC for Reservoirs: Make , Model No. Model Name/Number ֎ CE/UL approved manufacturer’s Programmable Logic Controller (PLC) in IP54 enclosure having modular PLC_ (Plug and play type) for control & monitoring with Modular Controller and should have modular communication. ֎ The Local PLC/ located at Poondi, Chembarambakkam and Red Hills should be able to communicate locally to the master controller at respective facility on an open protocol such as Profibus / Modbus over Ethernet TCP/IP using OFC cable & memory map of the same shall be available. ֎ Simultaneously the same PLC shall be able to communicate with SCADA Control Room via GPRS/GSM based wireless technology in order to create redundancy in telemetry to avoid loss of communication & Data. Whereas, in case of Chembarambakkam and Red Hills reservoir remote PLC_s shall communicate with Poondi master control room via. GPRS/GSM wireless communication only. ֎ It should be possible to view the reports of SCADA system without requiring any software, from any PC, using web-based protocols/webserver. ֎ Programmable according to IEC 61131 standard ֎ Data logs should be stored inside the CPU and should be downloadable in CSV format. ֎ Integrated digital In- and Outputs and analog Inputs. It should be possible to increase the I/O handling capacity of the PLC, without changing the CPU. To control and manage the gate position sensors, the VFD’s, other I/o for operations. ֎ Scalable and modular extensibility with In- and Outputs via signal modules, signal board, technology modules and additional communication capabilities ֎ Integrated technology functions for counting, measuring, controlling and motion control ֎ Integrated high speed counting Inputs and pulse Outputs (PWM/PTO) ֎ It should be possible to remotely configure the PLC from the master control room.