Installation
Wire the KSU TD (data to device from KSU) pin to
the device RD (receive data) pin.
Wire the KSU SG (signal ground) pin to the device
SG (signal ground) pin.
Wire the KSU CTS (clear-to-send status from
device to KSU) pin to the device
send) output pin.
NOTE: The
a
voltage,
respect to signal ground, in order to send data.
If required, wire the KSU
(request-to-send
status signal from the KSU to the device) pin to the
device DSR (data-set-ready) input pin.
If required, wire the KSU PG (protective ground)
tine(s) to the device protective ground
Data Format
Configure the data device to match the following data
format and to receive data at the baud rate that is set
by COS programming.
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data with 2 stop bits and no panty
fixed
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Baud rate of 110 baud
can be changed
to 300 baud through class of service programming.
System Grounding
It is required that a grounding wire, separate from the
three wire AC line cord, be used. A ground stud is to-
on the KSU for this purpose.
in-
sulated, solid copper wire between the ground stud and
a
earth ground such as a metal cold water pipe
or a building frame ground.
Common
and Auxiliary Station interface
Two sets of relay closure
points are avail-
able at the J-l station connector block.
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One set (J-l connections) provides a dry-contact
closure whenever any of the
lines,
connected to the KSU, ring.
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The other set provides a dry-contact closure when-
ever system station 17 rings.
These contact closures track the ringing pattern in both
cases. The contacts are closed during the ringing
period and are
open
during the silent
A typical connection is illustrated in Figure 2-2. Refer
to the paragraph headed Area Paging Interface for a
discussion for using these terminals in the
paging function.
Do not exceed a amp at 24 volts
at 48 volts)
load on these control terminals. If the load
ments exceed thls
connect the load through
an external slave relay. DO NOT CONNECT THESE
CONTROL TERMINALS DIRECTLY TO THE
LINE.
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