34938A Simplified Schematic | Agilent Technologies 34937A, 34939A

34938A 20-Channel High-Current GP Switch Module

34938A 20-Channel High-Current GP Switch Module

The 34938A high- current GP switch module provides twenty 5 A Form A (SPST) relays for general purpose switching needs. You can set the power- failure state for these 5 A relays (see “Hardware Power- Fail Jumper” on page 2).

	N O T E	A temperature sensor on these modules triggers system interrupts
	N O T E	when high-carry current-induced heat on the modules reaches a

		threshold of 70 oC. See description of the “HOT” annunciator on
		page 2.

34938A Simplified Schematic

NO

COM

NO

COM

Channel 001 (5A Form A)

Channel 020 (5A Form A)

Agilent 34937A-34939A General Purpose Switch Modules User’s Guide

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Agilent Technologies 34937A, 34939A manual 34938A 20-Channel High-Current GP Switch Module, 34938A Simplified Schematic

Contents

Agilent 34937A-34939A General Purpose Switch Modules 34980-90037 Agilent Technologies, Inc Additional Safety Notices Frame or chassis terminalUnited States 800 Europe 31 20 547 Japan Declaration of Conformity DoC for the 34980A mainframe Contents Page General Purpose Switch Modules Operating Considerations Temperature SensorSwitching Reactive Loads Hardware Power-Fail Jumper Open Power Down State 34937A, 34938A and 34939A Scpi Programming Examples Opening and Closing ChannelsReading Jumper State and System Identity Command resets a module in slot 4 to its power- on state Reading Cycle Count and Resetting Modules to Power-On State 34937A Simplified Schematic 34937A 32-Channel GP Switch Module 34937A D-Sub Connectors 34937T Terminal Block Wire Size AWG Typical AWG Max 34938A Simplified Schematic 34938A 20-Channel High-Current GP Switch Module 34938A D-Sub Connectors 34938T Terminal Block 34939A Simplified Schematic 34939A 64-Channel High-Density Form-A GP Switch Module 34939A D-Sub Connectors 34 no 41 no 48 no 55 no 62 no Male ConnectorPin D-Sub 33 no 40 no 47 no 54 no 61 no 34939T Terminal Block 34939A 64-Channel High-Density Form-A GP Switch Module Jumper Temperature sensor Index