Electrical Interfaces; Dc Power Interface; Dc Power Interface Signal Descriptions; Dc Power Input Specifications - Iridium 9522B Product Information Manual

Iridium Satellite LLC
9522B L-Band Transceiver Product Information Guide

4.0 Electrical Interfaces

The subsections to follow contain interface information for the electrical interfaces of the 9522B 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
6 below. The EXT_PWR and GND inputs are used to supply DC power to the 9522B LBT. The
EXT_ON_OFF control input is pulled to a GND level to toggle the 9522B LBT on and off. Note that both
pairs of pins should be connected for EXT PWR and EXT GND.

4.1.2 DC Power Input Specifications

The DC power requirements for the 9522B LBT are summarized in Table 7 below. Note that these
requirements apply to DC power measured at the 9522B LBT multi-interface connector input.
Typical current during call (see note)
Power Average – Voice/Data Call (see note)
Note: The average power consumption depends on the view of the satellite constellation from the
antenna.
The 9522B is intended to be supplied from a limited power source with a fuse or equivalent protection
device of no more than 3A. It is the responsibility of the installer to ensure that the complete system (of
which the 9522B forms a part) complies with EN60950-1 or UL60950-1 as applicable. In particular the
complete system must be capable of withstanding the 10kV surge test from clause 7 of this standard if its
power source is derived from a mains adapter.
Damage may result if the LBT is operated outside of the main input voltage limits.
Table 6: Control/Audio Interface Signal Descriptions
Signal Name
EXT_PWR (pin 6 and 7)
EXT_GND (pin 5 and 8)
EXT_ON_OFF (pin 1)
Table 7: DC Power Input Specifications
Parameter
Nominal Main Input Voltage
Main Input Voltage Limits
Main Input Voltage – Ripple
Consumption at +5 VDC
Input Standby Current (average)
Max current during call
Signal Description
External power input
External power GND input
Power on/off control input
Value
+4.4 VDC to +28 VDC
+4.0 VDC to +32 VDC
40 mV peak to peak
Value
300mA
2.5A
800mA
4W
14