TC12 Installation, Commissioning & Maintenance Handbook
S3 - Audio ON/OFF
This switch should normally be set to on. If it is set off then LED LP2 will light once
the board is powered up and the local SIP audio alarm will not sound in the event
of any faults.
If the Audible alarm on the system fault indication panel (SIP) sounds it should be
cancelled as required from the UTC TCC terminal. If the reason for the alarm is a
UTC TCC failure, an authorised/trained person (trained in the safety aspects of
working with mains powered equipment), should be asked to cancel the audio
alarm, using the audio off switch on the PSU PCB.
Volume Control
The volume of the audio alarm is adjusted by turning the screw on potentiometer
RV1.
C
connector PL1 on the PSU PCB in the first rack. The PCB will need to be in the
c Instation
there is no connection ards in these racks.
Co
boards when used in a digital output rack (See section 2.2.5.2), as well as for
interfacing with the Telecommand 8 highway.
3 and PL4
i I/O card as described in section
t to Modem PCBs as described in section 2.2.4.2.
onnector PL9 - No connection normally (used for a remote SIP only).
If
rack is s
able 667/1/22655/000. If a third rack is fitted, connect from PL10 on the second
PSU PCB to PL10 on the third PSU PCB and so on.
Connecto
Connecto ks, connect to modem
boards in those racks.
Connector PL1
onnect the cable (part number 667/1/22612/000) from the local SIP into
ard guide for the cable to reach. If there are additional 19" racks in the
to connector PL1 on the other PSU bo
Connector PL2
nnector PL2 - No connection normally. This is used to connect to digital output
Connectors PL
Connectors PL3 and PL4 connect to the Dig
2.2.2.7.
Connectors PL5 to PL8
Connectors PL5 to PL8 connec
Connector PL9
C
Connector PL10 - Additional Racks In the Same Cabinet
a further rack are included in the Instation then the PSU board on the second
et up as follows
Connect from PL10 on the first PSU PCB to PL10 on the second PSU PCB, using
c
rs PL1, 2, 3, 4 and 9 are not used on the PSU PCBs of additional racks.
rs PL5 to PL8, on the PSU PCBs of additional rac
666/HE/43100/000 Page 24 Issue 9