SPECICATION NO. ETI/PSI/144 (12/91) SPECIFICATION FOR ... - rdso

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6.9.13 All the equipments viz. computer, VDUs, key-boards, date logging
printers etc. and components used in the SCADA system shall be of industrial grade. A
certificate to this effect shall be furnished by the tederer.
6.9.14 The micro-computers used, If any, shall be IBM compatible.
6.9.15 The mimic-driver cabinets and the layout of the traction power supply
diagrams on the MDB shall be so designed as to convert any SP to TSS, if required, by
simply adding the required modules in the mimic driver and making minimum changes in
the MDB.
6.9.16 Construction of MDB
(i) The MDB shall normally be not more than 3.5 m in length for 30
controlled stations, 0.75 m in height and 0.2 m in width, and shall be desk-top/pedestal
mounted close to the operator.
(ii) The MDB shall be made of steel of thickness of 1.6 mm, reinforced
wherever necessary. To prevent corrosion the steel work shall be properly treated and
then given a primary coat of zinc chromate, both on the interior and exterior surfaces
followed by two coats of finishing enamel paint. The inner side shall be finished with
stoved enamel white paint. The external surface shall be finished with stoved enamel
paint of opaline green shade number 275 as per IS:5 or any other colour decided by the
railways, evenly sprayed to present a smooth and pleasing appearance.
(iii) Mimic display of catenary shall be by means of LEDs and metal strips. The
tederer may however offer any other state-of-the-art technique for consideration as an
alternative offer.
(iv) Each circuit breaker & interruptor shall be depicted with the help of a 3
legged LED on the MDB. The LED shall emit red/green colour to indicate
CLOSE/OPEN status respectively. The complementary fault shall be indicated by yellow
colour or dark state of the LED.
(v) Whenever any of the sub-sectors of OHE gets de-energised, the
corresponding portion shall be lit up and start flashing until acknowledged by the
operator.
(vi) The scheme of connections, identification numbers for circuit breakers,
interruptors and motor operated isolators, if any, and other indications on the MDB shall