1. Power Block Implementation
Power2 at the station
RF. 2
U I.2
120V AC
Converter to +9 V DC
CPU. 2
SC .2
NIC

2. Power Block Introduction Description
Power at the Station ( 120 V AC convert to 9V DC and supply to)
• UI V and 40mA
• UI V and 500mA
• RF V and 60mA
• CPU V and 100mA
• CPU V and 45mA
• CPU V and 500mA
• SC V and 30mA
• NIC V and 40mA

3. Power2 Block Diagram Power2 at the station 3.3 V 40 mA NIC +3.3 V
TRANSC.2
+3.3 V
40 mA
U I.2
+5 V
500 mA
CONVERTER
120 V AC to 9V DC
PS2
120 V AC
+3.3V
500 mA
CPU2
+1.5V
100 mA
+5 V
45 mA
+5 V
30 mA
SC.2

4. Power Block Performance Requirements
Power Inputs:
120 V AC power input ranging from Hz (Station Unit)
Electrical Functions:
Power supply to the CPU, Set up Control, UI and Transceiver
Electrical Interfaces:
Analog, Digital and Power Signals
Bi-Directional RF Transceivers
RS232 Network Interface

5. Power Block Performance Requirements Electrical Functions:
Power Modes:
On, Off
Function Modes:
Normal
Configure
Functional Features:
Bus Call
Taxi Request
Electrical Interfaces:
Analog, Digital and Power Signals
Bi-Directional RF Transceivers
RS232 Network Interface

6. Power Block Standard Requirements Energy Source:
• VAC ( 102 to 138 VAC % )
• 60 Hz ( 57 to 63 Hz +-5% )

7. Power Block Standard Requirements
Modes:
• On ( Primary, 120 VAC)
Frequency Range:
• Hertz ( 57 to 63 Hz range)
Safety current:
• A max current limit protection
• V over-voltage surge protection

8. Standard System Level Requirements
Standard Requirements
Environmental:
Operating Temperature Range: -40 to 70 °C
Operating Humidity Range: 2 to 98 %
Storage Temperature Range: -30 to 80 °C
Storage Humidity Range: 2 to 98 %
Storage Duration: 2 Years
Energy Sources:
120 VAC ( V, Hz)
Over Voltage Protection Circuitry

9. Power Block Standard Requirements Mechanical Life Cycle
Maximum area of the power supply board is 200 cm²
Life Cycle
Production Life 5 Years
Full Warranty Period: 1 Year
Service Strategy: Distributor Repair

10. Power Electrical Interface signal

11. Power2 Block Prototyping Plan
Name
Block Area (cm2)
Total PCB
Area (cm2)
Components
components
Costs
Power 1
200
120 V AC
Electric board
Diodes, R, C
AC/DC converter
$20

12. Block Prototyping Plan
Name
Block Area (cm2)
Total PCB
Area (cm2)
PCB
Substrate
Type
Comp
Attachment
Socketed
Components
Types of
Connectors
CPU 2
121
Plastic pads, no busses
Prototype board
None
0.25 headers
UI Modules
Soldering
Po_Station
200
Plastic
AC Adapt
Setup 60
RF.2 Module
72.6

13. Applicable Worst Case Analysis Plan (See DFM Analysis Guide)
Power Block DFM Plan
Sub Circuit
Type
Applicable Worst Case Analysis Plan
(See DFM Analysis Guide)
Task 1
Task 2
Task 3
Task 4
Task 5
Task 6
Task 7
Task 8
Task 9
Task 10
Power at the Station
AC Power
Total Parts 17
Diodes 4
Resister 9
Carbon film
Capacitor 1
Tantalum
NPN
TIP31
Input Power
9 V DC
Max Current
1500m A
Max
Voltage
10.35 V DC
Max Power
5.0625W
178 ohm
Min
8 ohm
AC to DC converter
Part
41-A-9-600
Input
120 v AC
Frequency
60 Hz
Output
+9 V DC
Max current
1.15 A

14. Applicable Worst Case Analysis Plan (See DFM Analysis Guide)
Power Block DFM Plan
Sub Circuit
Type
Applicable Worst Case Analysis Plan
(See DFM Analysis Guide)
Task 1
Task 2
Task 3
Task 4
Task 5
Task 6
Task 7
PS to S.U #2
Components
R,C
Safety current 30mA
+- 15%
Safety voltage 5V
+-15%
Voltage Reg 0.25V
+-5%
Current Reg
1. 5mA +-5%
Voltage Ripple
0. 1V +-2%
Safety power
4. 5mW+-15%
PS to CPU # 2
Safety current 500mA
Safety voltage 3. 3V
Voltage Reg
0. 165V +-5%
Current Reg
25mA +-5%
0. 063V +-2%
825mW +-15%
Safety current 100mA
Safety voltage 1. 5V
0. 075V +-5%
5mA +-5%
0. 03V +-2%
15mW +-15%
Safety current 45mA
Safety voltage 5V
0. 25V +-5%
2 . 25mA +-5%
0. 1V +-2%
mW +-15%
PS to U.I #2
Safety current
500mA %
Safety voltage
5V +-15%
0. 25V %
25mA +-5%
1 . 25W +-15%
40mA %
3 . 3V +-15%
0. 165V %
2mA +-5%
0. 063V +-2%
5 . 28mW +-15%
PS to Transc #2
60mA %
3mA +-5%
11 . 9mW +-15%
PS to NIC
Fn(s)

15. Power Block DFM Plan Input: AC 100-120V 50/60Hz Output: DC 9V 1.3A
Com21 - 9V AC Adapter Model: US100913
Part MFG:COM21 #: SKU #:22046
Weight:0.40 lbs
Price:  $4.95

16. Schematics of power at station

17. Schematics of current at Station

18. EnRoute Gantt Chart