Appendix 3: Model 26,285-1 Digital Voltmeter
APPENDIX 3
MODEL 26, 268-1
DIGITAL VOLTMETER
10 INTRODUCTION
The Model 26. 268-1 Digital Voltmeter is identical to the Model 26. 268-0 except for the addition
of two Model 6. 657-0 Buffer Inverter circuit cards. These cards are shown on system schematic
Drawing DOO 026 0268 0S, Sheet 7. Figures 1 and 2 locate major voltmeter components, while Table
1 presents a summary of the buffered functions on output connector J2.
2. SPECIFICATIONS
Electrical specifications for the Model 26. 268-0 apply to the Model 26. 268-1, but, because the
buffer inverter cards have been added, the BCD output NOT terminals have additional isolation
between the driven device and voltmeter digitizing circuitry.
PIN FUNCTION
1-A Spare
1-C Spare
I's
I's
I's
I's
10's
10's
10's.
10's
100's
100's
100's
100's
1000's
1000's
col BI pol Rl col BL pol HL ol A! pol HY oof Al ol HY]
APPENDIX 8 (Cont)
3. PARTS LIST
6.657 Buffer Inverter
4, DRAWINGS
Unit or Component
26, 268 Digital Voltmeter
6.657-0 Buffer Inverter
Type of Drawing
Schematic
Wiring
Schematic
Figure 1.
26. 268-1 DIGITAL VOLTMETER
Drawing Number
D026 0268 OS
(Sheets 5 through 8)
D026 0268 OW
(Sheets 6 through 10)
BOO 006 657 0S
ren eel lo
, A.)
mo
coo
26. 268-1 DIGITAL VOLTMETER
38.032-()
BCO COUNTER
CARDS
AS
44.302-0
PROGRAMMER
CARD
12.1654
CONVERSION
DELAY
NETWORK
6.657-0 ”
BUFFER INVERTER
vRI
43.141-0
7 POWER SUPPLY
REGULATOR
| CARD
Figure 2.
APPENDIX 3 (Cont)
NW2
26.116-)
SUMMING RESISTOR
NETWORK
26.242-0
COMPARATOR
AND
DIODE GATE
ARI
6.736-0
REFERENCE
AMPLIFIER
NW3
12.937-5
MISCELLANEOUS
NETWORK
AMPLIFIER
A3-3
mT |
4 |CR1I-1 to 9
5 |Ql-1 to 9
6 |R1-1 to 9
68K, +5%, 1/2W
(Allen-Bradley EB or equal)
Diode
Transistor: 2N1308
NOTE
For 0.6.657-1 version, delete
item 1 and add item 6.
Resistor, Fixed, Composition:
1.8K, +5%, 1/2W
(Allen-Bradley EB or equal)
ITEM) REF. DESIG. DESCRIPTION EAI NO, SCAT.
1 |R1-1 to 9 Resistor, Fixed, Composition: 00 626.0103-0 A
10K, +5%, 1/2W
(Allen-Bradley EB or equal)
2 |R2-1 to 9 Resistor, Fixed, Composition: 00 626.0182-0 A
1.8K, +5%, 1/2W
(Allen-Bradley EB or equal)
3 |R3-1 to 9 Resistor, Fixed, Composition: 00 626.0683-0 A
00 614.0043-0 B
00 686.0101-0 A
00 626.0182-0 A
NOTE: THE CATEGORY COLUMN IS DESIGNED TO INDICATE AVAILABILITY OF PARTS,
A+ INDICATES PARTS THAT SHOULD BE PURCHASED LOCALLY,
B -INDICATES PARTS THAT SHOULD BE PURCHASED FROM EAl.
pate 9/4 8
SS
UNIT TITLE
BUFFER INVERTER
wew= eu
MODEL No,
L0.6.657-0, -1 Sh. lof 1 Sh.
M446
on
ms
ne |
MOTELS =
ME OTN ER Roe Daag eee)
z es 70 BE wm nbs. FOL Conemph re
rene, aaa PO WEE SUB rst bhies
Mw 2 mal
don SUMING RES. NETWOR IE |
26.16 +4 |
|
Rie A 4
!
& Foe x uh
Bey He aN ey OL tol sol sel 4 ef nb |
/
he
PON 49 7-7 x
o
a i) >
AZ AT =
SS
el &
DO 3 i-
ray
®
Some Ene
Pi — > 42 7
277
Ue
i een
Ny
1 Ny
R92 ype
we:
Se 7
* »
; N= “
fy
2p Amu "
Bi Ti-ws !
ar s
aa ac ving |
!
=
COMPARATOR ANA PL FIER
26.242 |
I
!
<
be-2t a is
£-60
¥-2-eL eX H
Sy
tO
Of-iL-eh
A b- 2657-7
+2 2 7
‘DIGITAL DATA OUTPUT BIN, Jt / _ st
P i IARY CODEC OUT Eur pIGITAL DATA ourPuT BINARY CODED OUTPUT BiGITAL DATA OUTPUT BINA = He
$COSS 1900'S 10'S : pe RY CODED OUTPUT DIGITAL DATA OUTPUT
Cee a = & \ . Mig
ttt i sh STITT tery
J . ell wl a & RAK
a] 0 ZFS 3 13-15 t od
2 |4 Ve-& 6 7| a} 9) of = oe ee ee ee
‘ 2 apa : 5 iy F ie
' gz zo , -
A Of ee
AZ \S ~A nN KR A
BULLER HWVERTER t
O#.GEEI-7 = BYEFER (HER T Oke
2 —2-%-2-3 f y ce
“— (sy b} 4 -Y% _¥_ S gf € :
At age leew. i wien yee |e |* \2 7 -4-6 +
=e oT Te Ae -20 =e eS, Aree EPR 4% fz jv
a = Je-3-e 16 =e
act Fi] — ~teeo
RRS, > [QOS ICOLUTE 10'S COUNTER
REL | |
2 SWS Saszi-24 Ze. Sn2>Sue-0-2e
T2517 yag-Ti=25| ee :
\ 208-2
M 1 AB-T1-27- Ev F
| = SW e806 = ag-7-21 —(y C_ ____4 =
=| [eae s 2 2 AB-Ti-26 <7. pesi-30_ pe 28-28
| 31s is¢— ome — 7A 8- 1-32
Lite se —
| —_ 20>. —
a 4]
i
—— <——
iS S
g g
: t
g $
a o .
L I
Yes 3)
=e —
<2—
L. Az BCD COUNTER 38,032-O _
|
= mat} _
a ik = —__ tt aE s-
—T a
NW. \
PECTIFLER HETWOR 1
ZAHM06
rf ate pees a
i
orgs:
EES
‘ Cees.
aan Bncanarg Secret,
Sven one
S lose 20%,
som LEN Em Casnmennay;
MATS PETA) Sége aah ips
a
‘ -BV 55 ‘
EAS, 5
Kase sae
' AWS ‘i fA
| CONVERSION DELAY —)
METWORK AS TE
es
Be EF AMPAER
S. 44 ZB Empne | 5,28, 8117
Li4 aye iL.
ae
I
By see
[Mle dss
6.796
—6V CNRES
— ousaezon |
TH 9 Sane Gare
Sigg 20-282 |
co
REFERENCE AM PUFL:
+ AUESS CRURNISE SPFCIUED,
4%
we 10'S 70'S jo00's pe, Mle 5 -
8 AiALoG Mt 2EE
2 Zakd Dual bE <OmP sum oe
ar wn Tt ve Al Az a3 44 as , Aare 72/2 a NW es, ees C( LE Lee Sere
THER re
owacee a COM REAR 8% A ee bh HEE BOSE
Pf oe ae pinnnr ae: BES pons hah
2, Cried ‘2. Ws 12 GEM £D-) 128 HT ss .
[a venthond err pe eaeny 2-2 coro |,
24 Uf 12¢ z f2 2
3 exe ——s 2g PZ GEe » 22-7 upton ds
plo sw, 5p SESE 957-8 jop-Eo Bek | 4
pate iy Oey Loe. + agconnr |,
sin | cen ee Bet | ce mao, epee ay 4.2
8 — ci etl] lee lowes wa, cies eam FT ar H aes 3
] om &2-4 p————#ie ged Biol 4
aw seeccen) 5
a ere —— re teas “s ay RES STOR oN Open oe
1g} 22 | cor in =e arr | a ; zs ST eee
| eup me _—[ gee [ cer-? vee} | ayes 24eze tel ig
x cLoce Bio | 4 =}c3 6 gS LAMPL SS ge j7p—loen 9
4 }_Joen y
| ys = sen |” | Ons Ne 2BE2_) 2
Cd SEA-WHT\ zz > 4ebse SYS _ 45 we teen) .,
i= BAPLIEAS thy] eae WAT =/S0V x 2piK }a2
Se lll ee on — + 5&9) aah te tow +] og R Loan est] yen 9
a 2¢——_ ea 13) waryio-\proye | ys ve wae Zoe coax |i “=
re“D | Bixdzo le aqreitie- lew | eyae che en FS
yeu bor me
5-2 fe pa) _— BLK 20 24
62-14 bH:@:S2D | Be
5 GrD Bik 20 lo
SAS pee LE Bec 20 7p Bab cuT|psT REP [Ane [a F
4 2 ae eicit too S
5 =
P wat 2s 6 - 4) ‘5 Ee =1ov war a,
nfe jenn | aro A a A heron | 2 eee ee lis I) CEN) tee GF) -ioov rer] wmrsvio |
As 18) Bex FO + Chourer lame a Jez w. 4 e Yeu 9
D BLkZ2 }. ve i eae PRED ri Fa a TT
- 4 2 4 BrGe zo_4 cs Buck 1g Beepor mee al ae SEES
= re ce Bec stae loner a4] SHEL DED| wine
26D = RED fe “ even | e217 : vm
3
re bie ese + ay “5 WET) ~ revat-12 5 STAB _loreoe) SuRDED | wer -
pve pep tin | BOT Weetterz mh 4
5 ZéeO | ser coax z ARST A G 45 -at| wars |yo-eep
ani > fa 2 Bix 2 = =
| | s a = 48 +40V)
i a $2V. Pers ee
i eaves Lat e 9 TT Be | pA ee a
2
cI 4 LG
a (2) | wee 220 Vee.
" ‘ || Sue bap 220 VAS aE __4g
ox yy
tps y= if
wel ‘D' fy Tank & O
st ee = SHREDS] so
| a i
aN RELAY hoe ne :
¥e——T TT B24 2-22
~ “ae BUX ~*~ #2 GRO
A 20 Lo 20 snals 4 ‘one ur JE, m= Ss pi
14 furme | 20) -] cr ea coax a7
jj Geez | eve a aS
‘ eS _— ore
~ - '
a
pl — a
25CO se i 7
1s
vis
=5v — pi
J — 2 SS | SS 1 i! ian = i+
PS — +— +,
N
_| Bin %6} p75 |
| 1
» 4
or)
She2PH HSE
a)
|——-9 42-2
R22
SEto
Tuivae |
4LLSL EFT OFNMELCINSE SPECI O ALES
CA MHL ALE GS 42
2
Ur ve
HVA |
po as WAL E5S OTHELEISE SPECIFIED
Mah oy CII GE SAY MORKLESS Ahok
Ti 738. O02
I2 Al A2 As Ad AS
aw (2) 0008 BLK 5
av / WPoo's Ben vd
2x WWD Gey -
2y td YEL 8
‘27 L Bik 6
aK 2 WHT. €
2 3 ay =
oe 4 Vio “i
av S Buu 2
f000'$ < pp S Gen 7
2k Z yee E
a3 s BEA .
oT z 7) A
20 ° Be Wy,
Vig / BLE 4
ry 2 WAT -
24 = a. 7
2B f vie. uw
et $ BLU a
nos 2D 6 SRN b
Zt 2 yeu. =
aF 8 2A, a
2a 9: LED c
\ A (e} Ben H
fol / Be 8
Ted £ ol F
+N 2 ay -
4 vio
1P 7]
VE 5: au c
8< 1-3 é GEN jo
! AT 2 yee z
ty & Em) 2
lev 2 RED é
on 2 LRN, H
WE) ? Bux a
4 Z. boar F
a 3 SY 7
D + vio “
sé s Biv zc
G6 7 YeL =
PH g ORM r-%
pT 9 ged NG
2 eo) BEN W
ELECTRONIC ASSOCIATES, INC.
JERSEY
LONG BRANCH, NEW
REV. NO,
Cee
VEE Gas ocar “4
HARES SOS
~ ar z=
Py 2,
az ch BOOS Soke Sp snpig — rT
= |
[ | 7
AL 4225 £¢é |
Lé74 _B £7
SDE VIEL "18 30-BUS
BEN- |
WHT- BRN SEE DEAL re
THI aa = 4
BOVTOM
ej |
Eo
4 ao
SAE DETAIL A
\ VIEW A-A
a
. 4
2 oe comPiisé COMPONENT EF,
DESIEN ATION, APP STAGE NUMBES2 /
W PARENTHESES t£7e i Bt-CE,
4+/EV
Li- SEE
Ob DU thBle
STAGE #
SS
St
STAEE tf ckI-l ) ae)
al-c )
—P\— WV
20 0/4 0042 0
_—
J NOTES F
1 UNLESS) OTHERWISE SPECIFIED F
a. RESISTORS fel 210% 42nW
IN
7
00 C66 G04 9
VNSX*NE MOA
WOHVOQAWNS
\|
VAVHYAWH
SUCVXa sh
®
ANY
r
-73V
i
-/Sv MW <——® ~-45v
+isv L &——® 74
19084 >
FRO IeCY
NUMBER