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43755_user_guide
P8124-00, 3BE-P817-00, and 3BE-P818-00 respectively. A 10IP Torx
Plus® flat head version is also available in a single length of 1/2 inch
as part number 3BE-P801-00. Another 6-32 thread type option is to
insert a helical coil insert with a 6-32 internal thread into these fea-
tures thus accommodating 6-32 threaded fasteners as mounting
hardware for the 9522A LBT. National Aerospace Standard
NASM122238 serves as a technical reference for the recommended
helical coil insert.
3.5 Connector Sealing in Harsh Environments
If the 9522A LBT is to be used in a harsh environment with exposure
to high humidity or water, the mating of the multi-interface connec-
tor must be further sealed to protect from moisture entry. It is recom-
mended that a bead of RTV silicone sealant be placed on the con-
nector mating to the 9522A LBT's multi-interface connector where
shown in Figure 6 below. A material similar to Permatex 16B should
be used.
Figure 6: Place a bead of Silicone RTV material along this area all
around the connector mating to the 9522A LBT's multi-interface con-
nector.
4 Electrical Interfaces
The subsections to follow contain interface information for the elec-
trical interfaces of the 9522A LBT.
4.1 DC Power Interface
4.1.1 DC Power Interface Signal Descriptions
The DC power interface is comprised of the DC power inputs and a
control signal as summarized in Table 4 below. The EXT_PWR and
GND inputs are used to supply DC power to the 9522A LBT. The
EXT_ON_OFF control input is pulled to a GND level to toggle the
9522A LBT on and off. Note that both pairs of pins should be con-
nected for EXT PWR and EXT GND.
Table 4: Control/Audio Interface Signal Descriptions
Signal Name
EXT_PWR (pin 4 and 16)
EXT_GND (pin 3 and 17)
EXT_ON_OFF (pin 1)
4.1.2 DC Power Input Specifications
The DC power requirements for the 9522A LBT are summarized in
Table 5 below. Note that these requirements apply to DC power
measured at the 9522A LBT multi-interface connector input.
5
2/1/05
5:00 PM
Signal Description
External power +4.4VDC input
External power GND input
Power on/off control input
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