Dc Input Card; General - Honeywell 5701 Operating Instructions Manual

MAN0443.P65 Issue 13 Aug 04
05701-M-5001 A02279
CHAPTER 2 - SYSTEM DESCRIPTION
7.

DC INPUT CARD

7.1

General

The dc power to the rack normally enters the sub-rack via the DC
Input Card (Part Number 05701-A-0325). This power may be supplied
by the user from an external nominal 24V dc supply. The dc supply is
routed through the Engineering Card and sub-rack back plane to all
cards in the rack and is protected by a fuse on the DC Input Card.
There is a two part terminal block, TB1, to aid removal of the card
without disconnecting each of the connected wires.
If required, a stand-by backup battery supply may also be connected
to the auxiliary dc input connections.
The PSU and AUX connections are isolated from each other by diodes.
The DC Input Card also provides RFI filtering and reverse polarity
protection.
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5701 Control System