HP Car 3490A manual Option050andOption060, 29INTERFACE.CONNECTIONS, Data0utput0ption021

Model3490ASectionIl

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	I				OUTGUARDREMOTE
		A 8 JI O			03490 - 665t2
	I		aa,rs		- -	03490-66510
	l< -	cABLE w7		/
f - - -						.
	TSoLATEDREMOTE		: ISOLATEDBCD MODULE
	MOOULE03490- 60308			05490 -	60306
r	f f i		r	- l
					l_J	I
	- J -
					- - \	;'+ C A B L E W 4
	I				_ _ _ /
	i			.
	;< - caBLE rY6
				\
	t				-	TNGUARDBcD
					E

AI.J8

J J i J V - 9 9 J W t

-_ f-1 AIJ7 03490-56511

Figure24. Installationof lsolatedBCD Output and RemoteOptions.

W7 betweenthis assemblyand the outguardsideof the IsolatedRemoteModule (seeFigure24).

g.Make sure all boards are seatedproperly and all cablesaresecurelyinsertedin their connectors.

h.Replace top shield and top cover of the instru-

ment.

2-27.Option050andOption060.

2-28. A Model 34904 Option 050 (50 Hz power line) can be convertedto an Option 060 (60 Hz power line) ;^. and vice versa.Only two parts are different for thesetwo options. Theseare the Clock Oscillatorcrystal and the input resistorin the Integrator circuit. Table 2-1 shows the correctpartsfor eachoption.

Table 2-1. Option 050 and Option 060 PartChanges.

CrystalA'1R207

Frequency hp- Part No Resistance +lp- Part No

Option 050 3	.333MHz	o4100466	100 kfi	07574465
Option 06O 4	.000MHz	0410{465	84.5 ko	0@8-4510

2 - 29INTERFACE.CONNECTIONS .

2-30.Data0utput0ption021.

2-31. Data Output connections and logic levels are shown in Figure 2-5. The measurementmagnitude,

range, function, polarity and overload information is contained in ten four-bit groups of l-248 BCD coded information. This information may be either HIGH true or LOW true, as selectedby the HIGH/LOW switch on the OutguardData Output Assembly,Al0. In addition,

aData Flag output signalis provided which goesHIGH during a measurementsequence.The Printer Hold input line is HIGH true. while Hold and External Encode are LOW true. All input and output logic levelsare asshown in Figure 2-5. Outguard ground (pin 50) is isolated from inguard circuit common and chassis(power line) ground and may be floated a maximum of 40 V above chasis.

._.Themating connector for the rear panel Data Output connector J6 is -hp-Part No. 125l{086 (Amphenol

Output option.

2-32.RemoteGontrol0ption022.

2-33. Remote Control input and output lines and logic levels are shown in Figure 26. Range and function program lines are HIGH true, while all other input lines are LOW true. The Sample/Hold Mode, Delay and Trigger lines are for use with the Sample/Hold Option

040.The Program Flag output is HIGH during outguard- to-inguard transfer of program information, and the Data Flag output is HIGH during a measurement sequen@.The StretchedPulse Output is alsointended for use with the Sample/Hold option. All input and output logic levels are as indicated in Figure 2{. Outguard ground (pins 7, ll and 12) is isolated from inguard common and chassis(power line) ground and may be floated a maximum of 40 V abovechassisThe. mating connector for the rear panel Remote Input

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