The document describes B50A series power amplifiers for driving brushless DC motors. It provides specifications for two models, the B50A8 and B50A20, including voltage and current ratings, switching frequency, inputs/outputs, and mechanical details. The amplifiers feature surface mount technology, small size, low cost, and optional input signal isolation. They can be controlled via DIP switches or external controllers and provide four quadrant regenerative operation to drive the motors.

1. B50A Series
B5OAS ERIESP WMS ERVOA MPLIFIERS
MODELS: 850A8, 850A20
Sold & Serviced By:
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
FEATURES:
* Surface-moutnetc hnology
' Smalls ize,l owc ost,
ease of use
. Optionailn puts ignal
isolation{o r off{ he-rectiife d
120 VAC line operation
. DIPs witchs electable:
currentv, elocity,
open loop conlrol
* Fourq uadranrte generativoep eration
DESCR|pTIONB: 50AS eriesP WMs ervoa mplifieras re designedto driveb rushlessD C motorsa t a highs witching
frequencyO. peratinegl ficienciys 97"k.A IIm odelsa ref ullyp rotecteadg ainsot ver-voltagoev, er-currenotv, er-heatinagn d
short-circuitAs.l l modelsin terfacwe ithd igitacl ontrollerosr can be useda s a sland-alonsey stem.T heyr equireo nlya n
unregutatesdi ngtep owers upply. Loop gain, currentl imit, inputg ain and offsetc an be adiustedu sing 15{urn
potentiometerTsh. eo flseta diustinpgo tentiometcear na lsob eu seda sa no n-boaridn puts ignaflo rt estingp urposesw,h en
SWl0 (DlPs witchi)s "On".
cuRREriT REFERENCE <,, I
l'lAxll'lul'Ct URREfl=T 7.5U * '
aox orl sllro
ror( r*---lh +
HI6H uoLTAcE I
- cuRREflT LInIT
FUdCTIOIIAL BLOCK NIA6PAI'I
LINE REPRESENTS OPTIONAL 75()U ISOLATIO{ (ISO)
norE- aLL * cnouros AREI XTERIIr{-LYco rlNEcrE!.
IF IsoLAnoil oprlor! rs sELEcreD + AflD= 5 6R0uNDsn REi loT co{'lEcrED, IdTERHaLP 0,|ERS UPPLY
ALL P1 COIIIIECTOR PII1S AR€ ISOLATE! FROI1 ALL OTHER PIIJS. FOR HA-L
! ctt-A
3 Gfi!
'{ tic
5 ftc
6 Gl1I)
7 UCC
8 CH-8
LED GREEI'{ - NORNAL OPERATION, LED RED - FAULT
RECOHTENDEDSE TTIXG FOR CURRETiTI 'IODE- FOTI FULLY CC!I, POT3 FULLY C!
SI1 - FUT{CTIOTOt F POT 1 - TEST IIJFUT, IIIIEH ON. OFFSET AD..!.JSTI'IEiITI,I HEII OFF
S!I2 - LOII UELOCI]Y RANGE. t.IHEIi ON (USED III UELOCITY I'IODE OtiLY)
Sl,l3 - lU-€A, l4€l 011, lU-{A, llHEtl oFF
st10 - 1a) IIEGREE PHFS$i6, llHEn ofl, 60 DEGREE PHASttlG. LlHEd oFF
su9
CUPPENT NOiE NN xa ON
ox
UOI TAGF NODE
rR c0rlPENSAll0ti N ' NN OFF
IA.HniFTFP inTF I NFF NC OFF
www.electromate.com
sales@electromate.com

2. B50A Series
MODELS
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com
POWER STAGE SPECIFICATIONS B5OA8 850A20
SUPPLY VOLTAGE 20-80v 30-200v
MAXIMUMPE AKC URRENT 150A +50A
MAXIMUMC ONTINUOUCSU RRENT +25A +254
MINIMUM LOAD INDUCTANCE 1 50uH 250uH
SWITCHINGF REQUENCY 33 KHZ
THERMAL REOUIREMENTS:
Case Temperature
-25"Ct o +65oCc, urrenlr educedif over+ 65oC
OUTPUT SPECIFICATIONS
POWER SUPPLIES. +10V P1- 1
5mA, short circuit protected
-10v P1- 3
+5V P2- 1 30mA,s hortc ircuitD rotected
CURRENTR EFERENCE: P2-9 Maximumcu rren=t 7.5V
CURRENTM ONITOR: P2-8 1V=8Aw hen SW3=ON,1 V=4Aw hen SW3=OFF
VELOCITYM ONITOR: P1-10 10 kOhm
INPUT SPECIFICATIONS
HALLS ENSORS: P2-3 .4.5 TTL,i nternapl ull-upre sistors
iNFtstt: p1-6 TTL,i nternapl ull-upre sistorp,u llt o grounctoj inhibit
amplifier
TACHOMETER: P2- 6 Maximum16 0Va nalog6, 0Ki nputr esistance
INPUT: P1- 4,5 Differentianl alogin put,m aximum+ 10V,5 0Ki nput
resistance
MECHANICAL SPECIFICATIONS
POWERC ONNECTOR Screwt erminal
SIGNALC ONNECTOR Phoenixo r molexc onnector
SIZE (inches) 5.06x10.00x1.70
WEIGHT 2.5 lb
Sold & Serviced By:

3. B50A Series
MOUNTINGD IMENSIONS
_,:l
t P l
t @ l l " l -
ll- ---r l r -
F il
q-
r
tr
z-z
o
r
n
z
O
nq
n{z
w
3
C
O
tl
T
a r
n
EA - a
!
: ( !
b Q
1
: N
- 6 (
t
;^,
t N
t v = ' - N .
o C
3N
9t c
:o
P
-u N
'Hia
F I
i; v)
(rl
o
ft
@(,
q
n
n
ma
o(:
z
2n
a
?nzq
c]
z
q
T
o
o
O
ru
O
s
ru
-l
E-Tt
rn
> o
2 N
P . E : > m
u l x
n3
6
m
TN
1 0
6
!
t-
Sold & Serviced By:
ELECTROMATE
Toll Free Phone (877) SERVO98
Toll Free Fax (877) SERV099
www.electromate.com
sales@electromate.com