HP Car 3490A T,i",,*lJ.i: f: ,1.,t;:, l; gai äEä F ä = ;, l-r, ä Fc ö, SectionII, oPTtoN021, Model34904, 7N i 3i -st** {JrJü,1t;, Figure 2-5.Data Output Connections,Option

SectionII							Model34904
7N i 3i -s t** {JrJü,1t;
TA OUTPUTCOTruECTOR.IO
	oPTtoN021
:	, ^ j
	ä Fc ö- 8					Mating Connector:
	i : ^ j 3					-hp-Part No. 1251€086
z 9	E d 6 s	=	:	=	=
	ä					Amphenol No.	57-30500-378
		8	8	8	5

: ! z

; 9 e F e2 2

9 9 6 <

q i

?ä ; - ; 0 3 " : ' Y 3 E K B ö ?

l; gai äEä F ä = ;

5

LOGICLEVELS

Output Lines: HIGH= + 39 V t 1.5 V,4OOpA rnax. LOW= + 0.3 V r 0J V, lS mA rnax.

Input Lines: HIGH= + 3.9 V a 1.5V, 10OrrA max. LOW= +O.3 V r O.3V, 2 mA rnax.

High Reference= + 5.3 V

Low Referenc€{ V - Outguardground

Hafter signalnamemeansHIGH istrue. L after signalnarnemeansLOW is true.

Outguard ground is isolated from inguard circuit common and-chassis (power linel ground and ,nay be floated up ro

40V abovechassis.

DATA FLAG (PrintCommandOutputl

Changesfrom LOWto HIGH at beginningof measuremenr and returnsto LOWat completionof a readingrycle,

PRINTERHOLD

HIGH input le\rel causes349OA to stop autornatic samplinguntil levelreturnsto LOW.

HOLD

ContinuousLOW input teveldisablesautornaticsampling and permitsexternaltriggering.

EXTERNAL ENCODE(Trigser)

When "Hold" mode is selected,LOW input le\relfor minimum ol 24Ops initiates one readingcycle. See Paragraph364.

Printer columns DIGITAL RECORDERPRTNTCODES(Using-hp-50508 Standard* or - 1248print Wheell

information maynumberedfrom right to left. columns 1 through 5 print numericalvalueof measurementcoded. output Assenilclv,410' be either HIGH i.u" or LOW true, as selectedby t'heHIGH/LOW switch on the OutguardData Output

Thisswitchmustbe setto correspondto the logictrr" inprt leveirequiredby the digitalrecorderused.

N6

Dkplay

Colqmn 6

HlcH Tru.

Data

O C B A Print

LOW Trü.

Dat€	Ptint
D C B A

Column

HIGH Tre

LOü Tr{

Fundion 8it

0

L L L L 0

L L L H

D C B A Print

D C B A

Pr&rt

O.ta

L L L H	I
	Colomn t
HIGH Tru.
Ragr 8ir	Print

L L L L

LOWTru.

Rangr Bir

FüfFtkh

O, Remlo

AC, R.mt€

T6,R.@E

DC. F.tio

Jl, R.tio

{nor Elidl

L H L H
L H H L
L H H H
H L L L	8
H L L H	9

H L H L
H L L H	6
H L L L	7
L H H H	8
L H H L	9

Multiplit

D C B A

O C B A

Print

AC, F.r'o TH, Ratio

H L H	L	+
H L H H

L H L H +

to-r to-2 to-3 to{

to€ 'to€

L L L H	'
L L H L	2
L L H H
L H L L	4
L H L H	5
L H H L

L H H L	o
L H L H
L H L L
L L H H
L L H L	o
L L L H

oc o

AC T6

H H L L

H H L H

H H H L

H H H H

Cdumtr I

L H L L

L L H H

L L H L L L L H L L L L

T,i",,*lJ.i: f: ,1.,t;:

DaE raG Data Multiplier giv6 nesurerent anrclB or kilohG ex@Fit for Ratio @iuEments.

		Column g
		HIGH True			LOW Tru€
Fundid		Function Bit	Print		Functioo 8il	Print
		D C B A			D C A A
DC, Re@te, Ratio		L L L L		0	H H H H	0
tl, BemG,	Ratio
		L L L H		I	H H H L	1
AC, Remre,	Ratio
		L L H L		2	H H L H
T6t, Rmte,	Rario	L L H H			H H L L	3
OC, Remre		L H L L		4
					H L H H	4

Polrity,

Onrlod

+

+ , O L -. oL

S..tipb/Hold Mode

O N

O F F

HIGH Tru.		LOIV Tru!
D.b	Print	O.b	Print
D C E A		D C B A
L L L L	o	L L H H
L L L H	1	L L H L	n
L L H L	2	L L L H
L L H H		L L L L
Column l0
HIGH Tru.		LOW Tre
D.b	P.int	Dü	Print
D C E A		D C B A
H L H H		H H H H
H H H H		H L H H	4

Figure 2-5. Data Output Connections,Option 021.

l-r