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Figure 6-48
6.8.4 Output Panel Connections
The following output panel connections are made during installation.
Connections on the system backplane:
•
First Building Integrated Timing System (BITS) clock cable to Primary BITS
connector on J42, and connector J49 on backplane (P/N 850-0330-06 or -07), J49.
•
Second BITS clock cable to the SECONDARY BITS connector J48 on backplane
(P/N 850-0330-06 or -07).
Clock Output Connections
The BITS clock cables are used to transmit the clock outputs from the holdover clock
output panel to the control shelf backplane.
6.8.5 Holdover Clock Alarm Connections
The installation connections are shown in the wiring layouts in
Figure
6-51.
A holdover clock alarm cable is used to send alarms from the holdover clock to the
control shelf backplane.
Before using the following procedures, loosen the screws holding the clear plastic
1.
cover on the back of the holdover clock and remove the cover by lifting it off of the
screws
Connect the DB26 connector of the holdover clock alarm cable to the EXTALM
2.
connector and CUSTALM 1 connector J35, J66 on backplane (P/N 850-0330-06
or -07) on the system control shelf backplane, see
Secure connector screws.
EXTALM cable connects directly to the Holdover clock.
3.
The external alarm cable is an optional cable that may go from the EXTALM to a
terminal block see
Holdover Clock FAP Connections
Figure
6-50.
Chapter 6
Holdover Clock Installation
Figure 6-50
and
Figure
6-49.
6-100
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