Power Supply Considerations; Figure 2-10 Alternative Supply Arrangements - Motorola PTP 800 User Manual

User Guide: PTP 800 Licensed Ethernet Microwave

Power supply considerations

Consider the following when planning the power supply to the PTP 800.
x
A means of removing power from the PTP 800 without disrupting other
equipment, for example a circuit breaker.
x
Any circuit breaker or switch should be labeled.
x
Wiring from the power source to the PTP 800 should be sized accordingly.
x
All supply wiring should be to national standards and best practice.
x
A rack mounted power supply should be grounded in accordance with national
standards and best practice.
For more information, refer to
CAUTION

Figure 2-10 Alternative supply arrangements

Pin number
1
2
3
4
phn-1478_005v000
Apr 2010
A 4 Amp fuse or similar protection device must be provided between the
–48 volt supply source and the PTP 800 CMU
Always ensure that the -48V supply is turned off before attempting any
service on the PTP 800.
The CMU/ODU is positive ground and the DC power supply or battery
must also be positive ground or isolated.
PTP800
Pin 1
Function
-48V
0V
Not Connected
Chassis ground
AC to DC converter
PTP 800 Ground point
To Master Ground Bar (MGB)
or Rack Ground Bar (RGB)
PTP800 Power Connector
Alternative supply arrangements
Isolating device
4 amp fuse
Grounding and lightning protection
specificationson page 4-31.
AC – DC Converter
Motorola part WB3622
-48 V Power system
AC Input
100 – 240V 50/60Hz
2-15