2.3.2 8425/8525 Module
The following subsections outline the procedure for inserting and removing
modules from 8425/8525 systems.
2.3.2.1 UPM4 and TGate/Router (Main Modules)
The main modules are accessed by either opening the front door (8425) or
by unscrewing the five captive screws on the front door in the centre
section of the unit (8525).
Modules may be added and removed whilst the system is powered up,
provided that the following procedures are carefully followed.
The recommended way to plug modules into a live system is as follows:
1. Separate the TGate/Router from the UPM4.
2. Slide the TGate/Router between the upper runners until the connectors
are aligned, then push firmly home to minimise bounce at the connector
pins.
3. Slide the UPM4 between the lower runners and push home similarly.
4. Allow each pair of modules (TGate/Router + UPM4) to fully load (i.e.
display
r) before inserting the next pair.
To remove the combination:
1. Reset the UPM4 module or the pair by shorting the
RST link (marked on
the board).
2. Carefully slide out the UPM4 taking great care to separate the
connections cleanly.
3. Carefully slide out the TGate/Router similarly.
2.3.2.2 Port Access Modules (PAMs)
The PAMs are accessed by unscrewing the RFI screening bars on the rear
of the unit. Each PAM can then be withdrawn by unscrewing the two
knurled screws at either end and withdrawing the PAM from the unit.
Note: The RFI bars form part of the RFI seal: always replace and retighten
the screws.
X870-300351 Issue 1 2-6 Rev.0
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