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ABB Switzerland Ltd
2.6.
Binary I/O unit
The binary I/O unit 316DB6. enables binary signals received via
opto-couplers from station plant to be read and tripping and
other signals to be issued externally.
All the input and output units provide electrical insulation be-
tween the external signalling circuits and the internal electronic
circuits.
The I/O units in slots 1 and 2 also control the statuses of 8 LED's
each on the frontplate via a corresponding buffer memory.
The numbers of inputs and outputs required for the particular
version are achieved by fitting from one to four binary I/O units.
The relationship between the versions and the number of I/O
units is given in the
The opto-coupler inputs are adapted to suit the available input
voltage range by choice of resistor soldered to soldering posts.
This work is normally carried at the works as specified in the or-
der.
The technical data of the opto-coupler inputs and the tripping
and signalling outputs can be seen from the
2.7.
Interconnection unit
The wiring between the various units is established by the inter-
connecting unit 316ML62a (width 271 mm) or 316ML61a (width
225 mm). It is located inside the housing behind the frontplate
and carries the connectors and wiring needed by the individual
units.
In addition, the interconnection unit includes the connections to
the local control unit, the reset button and 16 LED's for status
signals.
2-8
REG 316*4 1MRB520049-Uen / Rev. C
data
sheet.
data
sheet.
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