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IOP - PDP and OMA Installation
9.1.
INTRODUCTION
This is a Power Distribution Panel for Input Output Processor (IOP), Alarm Display
Panel (ADP), Operation & Maintenance Alarm (OMA), Smoke Detector etc. The
isometric view of IOP-PDP is given in Fig. 9.1. It has four busbars for -48V, -48V
gnd, Digital ground and Chassis ground as shown in Fig. 9.2. Input to these busbars
is coming from DCDP1 for further distribution. It has 3 shell connectors for
supplying power to two IOPs and one ADP. Supply to these units is given through
MCB as shown in Fig. 9.2. A tag block has been provided to give supply to OMA,
Smoke detector etc. For these supplies, no fuse protection has been provided. A mini
busbar has been provided for distribution to these units. Input for this busbar is
also coming from DCDP. Internally connections have been provided between mini
busbar and the tag block. Similarly internal connections have been provided
between ground busbar and the tag block. On the top of the IOP-PDP, Fuse Blown
Indicator (FBI) card is mounted. The function of this card is to sense the presence
of -48V supply to IOPs and ADP. In case of failure of -48V supply to IOPs and ADP,
alarm signal will be extended by this card to OMA and will be displayed on FBI
card itself through an LED. This FBI card is covered with an acrylic sheet through
which the LEDs are visible.
9.2.
INSTALLATION OF IOP-PDP
The installation of this unit is very simple. It should be installed very near to the
+actual placement of the IOPs. This distance should be as small as possible so as to
minimise the DC voltage drop in the cable from IOP-PDP to the IOP. It is to be
installed on the floor itself at the position indicated in IOP room as shown in Fig.
1.5. Two rawl bolts are fixed on the floor to hold the PDP. A cut has been provided
on the bottom of the PDP for fixing it with the rawl bolt.
9.2.1.
FBI Card Mounting on IOP-PDP
FBI card is to be mounted on IOP-PDP for sensing fuse failure in IOP and
ADP. This FBI card extends alarm signal to the OMA panel assembly for
audio-visual display in case of any power failure in IOP & ADP. This card is
INSTALLATION MANUAL
Chapter 9.
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