18
BB-HCM547A
4.8.
PoE Block
[Power receive]
The power supplied from a LAN cable receives voltage (+48 V) via a diode bridge from a RJ-45 connector (CN502) on the IO
Board.
There are 2 types of PoE receiving methods; a type using unused pins (4, 5, 7 and 8 pin) for LAN data transmission and a type
using the mid point of data lines (1, 2, 3 and 6 pin). This product is compatible with both types because it is equipped with 2 lines
(D501 and D502) of diode bridge circuits
The outputs of the 2 diode bridges described above are connected to the same poles and supply the subsequent ci and -
powers.
[PD certification circuit]
The voltage obtained from the diode bridges is supplied to the PD control IC (IC501) of PoE.
The PD control IC (IC501) performs the following operations with the applied voltage from the supply side of power.
For applied voltage of 2.8 - 10 V from the supply side, it returns the internal resistance value of PD control IC (IC604) (25 k
Ω
).
For applied voltage of 15.5 - 20.5 V from the supply side, it returns the current value by the resistor connected to the Pin (5) of
IC501. (This product is resistance value (45.3
Ω
) and it is designed with Class 3 specification.)
When 48 V is applied as the certification progresses, it conducts between the Pins (7) and (10).
[Voltage drop section]
When the power of 48V is supplied to the following DC/DC converter section based on the PD authentication, voltage is con-
verted by PD control IC (IC501), output FET (IC502), switching transformer (T501), rectification diode (D517 and D518), and
capacitor (C513), which results in output of +12 V.
[Switching with AC adaptor]
There is a DC jack (CN601), to which an AC adaptor is connected when POE is not used, and +12 V is input from the AC adap-
tor. Switching of +12 V from the PoE circuit is conducted by using diodes (D521 and D519).
Содержание BB-HCM547A
Страница 8: ...8 BB HCM547A 4 Technical Descriptions 4 1 CPU Peripheral Block ...
Страница 21: ...21 BB HCM547A 6 Installation Instructions 6 1 Installation Guide ...
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Страница 26: ...26 BB HCM547A 6 2 Setup Guide ...
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Страница 28: ...28 BB HCM547A 7 Troubleshooting Guide 7 1 Basic Operation ...
Страница 29: ...29 BB HCM547A 7 2 Other Function Check ...
Страница 30: ...30 BB HCM547A 7 3 Power Supply Block Check ...
Страница 31: ...31 BB HCM547A 7 4 CPU Peripheral Block Check ...
Страница 32: ...32 BB HCM547A 7 5 LVDS Block Check ...
Страница 33: ...33 BB HCM547A 7 6 Image Block Check ...
Страница 34: ...34 BB HCM547A 7 7 Audio Block Check ...
Страница 35: ...35 BB HCM547A 7 8 LAN Block Check ...
Страница 36: ...36 BB HCM547A 7 9 Motor Block Check ...
Страница 37: ...37 BB HCM547A 7 10 Lens Block Check ...
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Страница 39: ...39 BB HCM547A 7 11 I O Terminal Check ...
Страница 40: ...40 BB HCM547A 7 12 SD Card Block Check ...
Страница 41: ...41 BB HCM547A 7 13 RTC Circuit Check ...
Страница 42: ...42 BB HCM547A 7 14 LED Circuit Check ...
Страница 43: ...43 BB HCM547A 7 15 Diagnosis NG Check ...
Страница 44: ...44 BB HCM547A 7 16 Version Upgrade Check ...
Страница 50: ...50 BB HCM547A 8 1 2 How To Remove Tilt Board 1 Remove Dome Cover ...
Страница 51: ...51 BB HCM547A 2 Remove four Screws A and Dome and Rubber parts 3 Remove a Screw A and remove Pan Cover ...
Страница 75: ...75 BB HCM547A F1 F2 H1 H2 H3 G E C1 C2 E1 E2 K I3 I2 I1 ...
Страница 76: ...76 BB HCM547A N1 L3 L2 L1 K5 K4 M1 M2 K6 K2 K1 K3 N2 O S Q R P ...
Страница 77: ...77 BB HCM547A U T V3 V2 V1 W3 W1 W2 W4 X1 X2 X4 X3 ...
Страница 78: ...78 BB HCM547A Z5 Z6 Y1 Y2 Y3 Z4 Z1 ZA1 ZA3 ZA2 Z3 Z2 ...
Страница 87: ...87 BB HCM547A 12 Appendix Information of Schematic Diagram 12 1 Terminal Guide of ICS Transistors and Diodes ...
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Страница 90: ...90 BB HCM547A 13 2 Accessories and Packing Materials ...
Страница 99: ...99 BB HCM547A A BBHCM547A ...