F3200/NDU AS4428.1 Installation Manual Document No: LT0255
Configuring a FIP
Page 4-6 30 June 2004 Issue 1.04
4.3.4 BATTERY SIZE
The maximum battery size given in the specification, Section 3.3.3, of 220mm x 220mm x
175mm, is imposed by the Cardframe, which obstructs insertion and removal of batteries in
the bottom of the cabinet.
The maximum sizes which fit within this restriction are:
Century Yuasa PS-12400 40 Ahr
IRH BB Battery BP 40-12 40 Ahr
Panasonic LC-X1242P (AP) 42 Ahr
YHZ Power GP12400 40 Ahr
Yuasa NP38-12 38 Ahr
If batteries larger than this are required, then the Cardframe can be made removable by
replacing the 3 pop rivets with M4 or M5 screws and nuts.
For an FP0780/782, or an FP0781/783 with a removable Cardframe, the maximum allowable
size is 220H x 260W x 175D.
Fitting and removing batteries of this maximum size is difficult, and may require the removal
of any modules or brackets fitted in the bottom of the cabinet.
These very large size batteries may also impede the plugging in and removal of modules
fitted to the bottom position of the Cardframe.
Battery Combinations
Large capacity batteries can be made up of two parallel sets of 24V batteries of smaller
capacities. This allows easier fitting, and allows larger capacities, and a greater range of
capacity to be achieved than is possible with a single pair (as indicated above).
4.3.5 BATTERY OVERCURRENT PROTECTION
The MAF/PSU has two parallel PTCs, rated to carry over 3A, for battery overcurrent
protection.
Where the Alarm load from the battery to the FIP is greater than 3A (i.e. with mains failed),
or where a 6A power supply is used, an external, self-resetting, overcurrent device of
suitable rating (greater than 6A, less than 35A e.g. Derwent, 10A Type D (connected to pins
1 and 3)) must be wired between the battery terminals on the MAF/PSU and the battery (see
Fig 4.3.2). For this option the PTCs must be shorted by soldering a suitable copper wire
between the two adjacent test points +VB and BATT+ (TP11 and TP16 on the MAF/PSU).
For a FIP supplied with a 6A PSU, this is done in the factory and the Derwent cut-out is
included.
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