AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
AHMEDABAD DIVISION TENDER DOCUMENT ... - Western Railway
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• On-board Memory to store data during failure of GPRS network.<br />
• The EMCS Unit should have LCD Display and keypad. LED indications for the status<br />
of GSM Connectivity.<br />
• The EMCS device should have provision for interfacing with any ultrasonic level<br />
sensor and automatic valves so that complete automation is possible if required in future.<br />
• EMCS shall have ADC (Analog to Digital Converter) for sensor integration with<br />
following industry standard<br />
a. PT-100 Inputs – 2 Nos.<br />
b. 0-10 V Inputs – 2 Nos.<br />
c. 0/4-20mA Inputs – 4 Nos<br />
d. Digital Inputs - 2 Nos.<br />
Input Voltage 0-4 V as logic '0', 4 - 30V as logic '1'<br />
e. High Speed Inputs - 2 Nos.<br />
Input Voltage 0-3.5 V as logic „0, 3.5 - 30V as logic '1'<br />
f. Digital Outputs - 2 Nos.<br />
Potential Free Outputs (1 Common and 1 NO contacts)<br />
g. Maximum Input frequency 1 KHz<br />
h. Field Power Supply to Sensors<br />
i. DC 12 V Output - Range 11.5 to 13.8 VDC<br />
ii. DC 24 V Output - Range 21 to 26 VDC<br />
3. 2 Specification for Energy Meters – 3 Phase CT operated LT meter<br />
• 4 quadrant, bi-directional 3phase- 4 Wire Metering system<br />
• Accuracy Class 0.5S<br />
• CT Rating 5A, 3 CTs for measurement of Phase currents.<br />
• Display for viewing Parameters and Settings, Keypad for Setting of CT Ratio.<br />
• Communication interface shall be Modbus RTU on RS-485 network (2 Wire Halfduplex).<br />
[ Tenderer ] [ Page 34of 44 ] [For Sr.DEE/ADI ]
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