New CMM Power options - Cambium Networks Community
Cambium
CMM
Application Note – CMM Power
Supply Refresh
Detailing the discontinuation of CM M pow er supplies and
introduction of new CM M pow ering options
CMM power supply changes – Overview
Discontinued CMM power options
Beginning in December, 2015 four CMM power supply options are discontinued:
Table 1 Discontinued CMM Powering Options
Name
Part Number
30 VDC Power Supply
ACPS120WA
(6’ North American IEC AC line
cord included)
ACPS120W-02A
ed
inu
t
on
sc
i
D
N000000L053A (formerly
SGPN4076)
ed
inu
t
on
sc
Di
SGPN4075
ed
inu
t
on
sc
Di
30 VDC Power Supply
(without AC line cord)
56 VDC DIN Rail-mount Power
Supply
(no cables or cords)
d
ue
n
i
t
on
sc
i
D
56 VDC Rackmount Power
Supply
(no cables or cords)
New CMM Power options
Two new CMM powering supplies replace the discontinued power supplies listed in Table 1:
Table 2 New CMM Powering Options
Name
30 VDC Power Supply
(no cables or cords)
54 VDC Power Supply
(no cables or cords)
NOTE
Part Number
N000000L055A
N000000L054A
54 VDC shown, 30 VDC model features
same design
When powering PMP 450i AP devices, a crossover cable must be used, or Cambium
dongle N000045L001A may also be used (PMP 450i devices require pins 8,7 +Vcc and pins 4, 5
DC return).
Installing the power supply for the CMM4 (30
VDC or 54 VDC)
WARNING! Although the output of the power supply is 30 VDC or 54 VDC, the
power rating classifies the converter as a Class 2 electric device.
For this reason, whenever you work on power in the CMM4, you
must first disconnect the DC supply from the AC power source. Procedure 1 Installing the CMM power supply
1
Install the CMM4 power supply in a hut, wiring closet, or weatherized NEMAapproved enclosure. It is designed for extreme temperatures but it is imperative
to keep moisture away from the power converter.
2
Do not install the power supply within the CMM4 enclosure. The CMM4
enclosure is large to provide surface area for heat dissipation without the use of
forced convection fans, not to provide space for additional high-power electronics.
3
For the DC side of a 54 VDC
power supply, engineer the
DC cable, selecting the wire
gauge from the table right.
Use either UV-resistant
cable or shield the cable (as
in a conduit) from UV rays.
DC Power Cord Length
Wire Gauge
Up to 90 ft (3−25 m)
12 AWG (4 mm2)
91−145 ft (26−45 m)
10 AWG (6 mm2)
146−230 ft (46−70 m)
8 AWG (10 mm2)
NOTE
EU Countries Only
To enable regulatory compliance with the European Union (EU) directives, a
power line filter module must be installed on the DC side of the
power supply. This module may be ordered from Cambium
networks (part number N000000L056A). Please reference the
PMP Synchronization Solutions User Guide for installation
details.
4
Remove the clear plastic cover,
then connect the DC cable as
Figure 1 Power supply DC
connection
shown right. Insert the +V lead
into the screw terminal clamp
labeled “+V” and insert the GND
(ground/return) lead into the
screw terminal clamp labeled “V”. To insert a lead into a screw
terminal clamp, first loosen the
retaining screw, insert the wire
into the terminal, then tighten the
retaining screw. Once the cables
are secure, reinstall the clear
plastic cover.
5
For the AC side of the power
supply, remove the clear plastic
Figure 2 Power supply AC
connection
cover then connect an AC cable to
the power supply using
Ground/protective earth ( ),
Neutral (N), and Line (L) as shown
right. To insert a lead into a screw
terminal clamp, first loosen the
retaining screw, insert the wire into
the terminal, then tighten the
retaining screw. Once the cables are
secure, reinstall the clear plastic
cover.
NOTE
The 30 VDC CMM4 power supply is labeled as 30 VDC and typically measures 30 VDC at
its output. The associated CMM4 terminal blocks are marked 29 VDC, and associated SM
power supplies are labeled 29.5 VDC. All of these components are elements of a nominal
30 VDC system, and can be considered “30 VDC” elements.
The 54 VDC CMM4 power supply is labeled as 54 VDC and typically measures 54 VDC at
its output. The associated CMM4 terminal blocks are marked 56 VDC, and associated SM
power supplies are labeled 56 VDC. All of these components are elements of a nominal 56
VDC system, and can be considered “56 VDC” elements.
Power supply specifications
Output
Input
N000000L055A (30V)
N000000L054A (54V)
DC Voltage
30V
54V
Constant Current
Region1
15 ~ 30V
27 ~ 54V
Rated Current
8A
4.45A
Rated Power
240W
240.3W
Voltage Range2
90 ~ 305VAC
Frequency Range
Efficiency
AC Current
Protection
127 ~ 431VDC
47 ~ 63Hz
92.5%
4A / 115VAC
Over Current3
93.5%
2A / 230VAC
1.2A / 277VAC
95 ~ 108%
Protection type: Constant current limiting, recovers
automatically after fault condition is removed
Short Circuit
Over Voltage
Hiccup mode, recovers automatically after fault condition
is removed
33 ~ 39V
60 ~ 67V
Protection type: Shut down and latch off o/p voltage, repower on to recover
Environment
Other
1
Over Temperature
Shut down o/p voltage, recovers automatically after
temperature goes down
Working Temp.
-40 ~ +70°C
Working Humidity
20 ~ 95% RH non-condensing
MTBF
207.9K hours min. MIL-HDBK-217F (25°C)
Dimension
251 x 68 x 38.8 mm (L x W x H)
All parameters NOT specially mentioned are measured at 230VAC input, rated load and 25°C of
ambient temperature
2
Derating may be needed under low input voltages. Please check the static characteristics for
more details
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