The PD-1002 module is designed to extract power from a conventional twice pair 1000M Ethernet or single pair 10/100M Ethernet cable. Let customer easily and flexible building in product design. This designed can provide total power up to 25W as specified by the POE plus IEEE802.3at standard. In addition, The PD-1002 module can be interfaced to any PSE that follow detection and classification procedures defined by the IEEE802.3af standard.
PD-1002 Block Diagram:
PD-1002 Package Format:
|1||VA1||RX Input||This input pin is used in conjunction with VA2 and connects to the centre tap of the transformer connected to pin 1 & 2 of the RJ45 connector (RX). It is not polarity sensitive|
|2||VA2||TX Input||This input pin is used in conjunction with VA1 and connects to the centre tap of the transformer connected to pin 3 & 6 of the RJ45 connector (RX). It is not polarity sensitive|
|3||VB1||Direct Input||This input pin is used in conjunction with VB2 and connects to pin 4 & 5 of the RJ45 connector. It is not polarity sensitive|
|4||VB2||Direct Input||This input pin is used in conjunction with VB2 and connects to pin 7 & 8 of the RJ45 connector. It is not polarity sensitive|
|5||+VDC||DC Output||This pin provides the regulated output from the DC/DC converter|
|6||+VDC||DC Output||This pin provides the regulated output from the DC/DC converter|
|7||GND||DC Return||This pin is the return path for the +VDC output|
|8||GND||DC Return||This pin is the return path for the +VDC output|
Typical System Diagram:
When the PD-1002 is connected to the Cat 5e cable, it will automatically present a Powered Device (PD) signature to the Power Sourcing Equipment (PSE), when requested. The equipment will then recognize that a powered device is connected to that line and supply power.
To meet the safety isolation requirements of IEEE802.3af/at section 33.4.1 a Powered Device (PD) must pass the electrical strength test of IEC 60950 sub clause This calls for either a) 1500Vac test or b) 1500V impulse test. The PD-1002 is specified to meet the 1500Vdc impulse test. It is also important that the tracks on either side of the isolation barrier have at least a 3mm clearance.
The PD-1002’s DC/DC converter provides a regulated low
The PD-1002 can be used in numerous applications, in the example shown in Figure above, the data+power outputs from the PoE switch are connected to the each output that supports Power over Ethernet (PoE). In this example port 1 is connected to an ethernet camera and port 2 is connected to a wireless access point, both of these devices have a built-in PD-1002. When the PoE Switch is switched on (or when the device is connected), the PoE Switch will check each output for a PoE signature. On ports 1 and 2 the PD-1002 will identify themselves as PoE enabled devices and will supply both data and power to these peripherals. The other ports (shown in this example) will not have a PoE signature and only pass the data through to these peripherals. The PoE Switch will continuously monitor each output to see if a PoE enabled device has been added or removed.
Operating Temperature Range:
Because the PD-1002 is a power component, it will generate heat, so it is important that this be taken into consideration at the design stage. The heart of the PD-1002 is a DC/DC converter, which like any other power supply will generate heat. The amount of heat generated by the module will depend on the load it is required to drive and the input voltage supplied by the PSE. The PD-1002 has a maximum ambient operating temperature of 70°C. These results are in still air without any heat sinking. The output stage of the PD-1002 has no built-in thermal protection, to prevent the module from being damaged it is recommended that the module be powered by an IEEE 802.3af/at compliant PSE or PoE Switch equipment. However the PD-1002 may be powered by a user designed power supply which should include thermal and over current protection. Because each application is different it is impossible to give fixed and absolute thermal recommendations.
PD-1002 CE(55022_Class B); FCC(FCC part 15B-Class B) Profiles:
|1||DC Supply Voltage||Vcc||-0.3||60||V|
|2||DC Supply Voltage Surge for 1 ms||Vsurge||-0.6||80||V|
|1||input Supply Voltage||Vin||42||48||53||V|
|2||Under Voltage Lockout (After start up)||Vlock||30||36||V|
|1||Nominal Output Voltage||+VDC||11.5||12.2||12.5||V|
|4||Peak to Peak ripple noise||Vp-p||100||mVp-p||@Max load|
|5||Steady state Effciency||EFF||85||%|
|6||Static load regulation||Static||100||mV|
|7||Dymamic load regulation||Dynamic||250||mV|
|8||lsolation Voltage(I/O)||Viso||1500||Vpk||Impulse Test|
|Note||1: Typical figures are at 25°C with a nominal 48V supply and are for design aid
only. Not Guaranteed
2: The output ripple and noise can be reduced with an external filter.
3: Continuous short circuit duration is applicable at 25'C ambient temperature
in free air. At higher temperatures or with restricted airflow (e.g. in a sealed
enclosure) the duration will need to be limited to avoid overheating.
|Standard||IEEE 802.3 |
|Input Voltage||48 VDC|
|Output Voltage||24 VDC|
|Max. Power Output||30W|
|DC Jack Diameter||5.5 x 2.1 mm|
|ESD/Surge Protection||+/- 15 KV|
|Dimension||100 x 47 x 27 mm|