BA-5590 Family Battery Eliminators


© Brooke Clarke 2015

Background
Description
Photos
Recovery
Related
Connectors
Links

Background 

There are a number of modern military radios designed to use a pair of BA-5590 batteries (usually the BB-2590 now - 2016) where the battery box is just a drawn aluminum box.  But there are a number of after market add-on battery boxes that contain a battery eliminator functioni by making use of some external power supply, typically world AC, 12 VDC or 24 VDC.  An example is the WKW-7 Power Adapter.

Description

The MRC-82A Power Supply & Charger and MRC-93 Battery Eliminator look identical on the outside.  The MRC-93 appears to be used and theMRC-82A appears to be new and includes a BB-2590 battery.  They both have provision for one internal battery.  They both have buttons for Arm and Disarm that turn on and off the internal battery.  When there's a charged internal battery and the ARM button is pressed will power the radio from the internal batter if the input power fails.

Photos


Fig 1 MRC-82A Power Supply & Chaarger (Ultralife Corp)
MRC-82A

Fig 10 MRC-93 Battery Eliminator (no charger) (Ultralife Corp)
MRC-93

NSN: 6130-01-513-9182
AC In:
95-265 VAC, 47-440 Hz
DC In:
9-36 VDC (note: includes both 12 V and 24 V)
DC Out:
26.5 VDC at 5.5 amps & 26.5 VDC at 7 amps (peak)
AC Input Cable:
PCP-35
DC Input Cable:
PCP-40
Input Connector on MRC-82A:
Connector to make input Cable:
Optional Cables:
PCP-55/65 Auto – DC w/Banana Plugs, PCP-235 NATO Input Cable

Internal battery: MRC-2590 (BB-2590) only
NSN: 6130-01-520-8178
AC In: 95-270 VAC, 47-440 Hz
DC In:
9-36 VDC (note: includes both 12 V and 24 V)
DC Out: 
26.5 VDC at 5.5 amps &  26.5 VDC at 7 amps (peak)
AC Input Cable:
PCP-35
DC Input Cable:
PCP-65
Input Connector on MRC-93: KT07A16-8P
Connector to make input Cable:
Output connector mrc-93: BX07A8-2S
Optional Cables:
PCP-55 Auto – DC w/Banana Plugs, PCP-40 DC Input Cord, PCP-235 NATO Input Cable

Internal battery: BA-5590, BB-2590, BB390, BB490 or BB-590

Fig 20 MRC-99
Note battery plug at upper left corner only has pins for battery socket, i.e. no extra contacts
for temperature sensor or special charging enable. OK for BB-490 lead acid battery.
MRC-99
Fig 21 MRC-99 block diagram
MRC-99
Although these parts came from an MRC-99 (that uses a lead acid internal battery)
some of the individual components are marked MRC-82A
The lower left block is a world AC in/ DC out power supply
Connector Pin Out
Pin
Function
A

B

C

D

E

F

G

H



Recovery

The UBI-2590 battery that came in theMRC-82A showed no bars on the state of charge LCD, i.e. totally dead.  Even after a few days in the MRC-82A, although it showed 3 of 5 bars, it was still dead (a small load completely drained it).  So in the hope of getting it to reset tried the Bren-Tronics VMBC BTC-70870-1.  But a little research shows that the VMBC does not have the ability to reset a BB-2590 battery so tried the SPC PP-8498/U, which is supposed to be able to reset a battery.  But it too failed to bring the UBI-2590 back to life.

Related

BA-5590 Family of batteries
Battery Chargers
WKW-7 Power Adapter (Designed for use with obsolete BB-490 lead acid battery)
5590BA Battery Adapter - batteries not included, pack to be made by customer.
Vehicle Mounted Battery Chargers (VMBC)

Connectors

Fig 2 LEDs: AC in, DC in, Internal Battery
MRC-82A
Fig 5 AC Line Power
8/12/2016 10:30 am
MRC-82A

Fig 6 BB-2590 Starting at zero charge
Note wide block-plug for BB-2590 battery.
MRC-82A
After a few hours the BB-2590 State Of Charge indicator
has the lowest level segments blinking.  If the plug is
removed from the battery they still blink.  So it looks like
a low battery warning. It may take a day or a few days to fully charge this battery that's been sitting dead for who
knows how long (years?).

After a day there are 3 of 5 bars showing.

After a couple of days running 24/7 still at 3 of 5 bars.
still not charging.  A load of a few amps drained it in less than a couple of minutes.

Input

MRC connector: KT07A16-8P
Cable connector: PT06E-16-8S (SR) (William Perry)


Pin
Function
A
AC Hot
B AC safety ground
C
AC Neutral
D & G DC return
E & F
+DC
H
nc



A
B
C
D
E
F
G
H
A
-
OL/25 nF
0.9M/0.36uF
OL/25nF
OL/25nF
OL/25nF OL/25nF OL/0.3nF
B

-
OL/25nF 0.2/OLuF
charging/840uF
850uF
0.2/OLuF
0.3nF
C


-
OL//25nF OL//25nF O/25nF/25nF OL//25nF OL/0.3nF
D



-
850uF
850uF
OLuF
0.3nF
E




-
0.2
2200uF
0.3nF
F





-
2200uF
0.3nF
G






-
0.3nF
H







-
Ohms/uF Table
25nF if a wire else 0.3 nF if no wire?
This table is for a modern power supply that accepts world AC ( 95-265 VAC, 47-440 Hz)
all on the same (A & C) terminals.

Output

MRC connector: BX07A8-2S
Cable connector: PT06E-8-2P (SR)
(William Perry)

Pin
Function
A
+DC
B
-DC & chassis gnd

Links

PRC68, Alphanumeric Index of Web pages, Contact, Products for Sale

Page created 2016 June 10