TC12 Installation, Commissioning & Maintenance Handbook
666/HE/43100/000
Page 22
Issue 10
2.2.3 Systems Fault Indication Panel (SIP)
The SIP (part number 667/1/22667/000) is 6U high and is screwed to the Instation
racking in front of the PC.
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.
Under System Failure conditions the output relays for a remote SIP switch on and
off, which gives rise to a clicking sound. If the customer wishes to stop this sound
and there is no remote SIP fitted the following Resistor links may be removed from
the PSU board: R25, R41, R44, and R47. See 666/CF/02249/102 at the back of
the Handbook.
2.2.4 19" Racking PCBs
Figure 6 shows a front view of a fully equipped rack (there is an assembly drawing
for the rack, part number 667/GA/22626/000). The cards should only be put in the
slots in the order shown. A maximum of four racks may be fitted to an Instation.
Figure 6 - ITU 19" Rack (Front View)
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PSU
6U Rack, Radial System
