Agilent Technologies L4400 manual Matrix Switch Instrument, Sub connectors

5L4433A Dual/Quad 4x8 Reed Matrix

Matrix Switch Instrument

The L4433A Dual/Quad 4x8 Reed Matrix switch offers a convenient way for you to connect multiple instruments to multiple points on your DUT. For a lower cost and better specification alternative, you can connect both the L4433A matrix instrument and the L4421A multiplexer instrument.

Although flexible, it is possible to connect more than one source at the same time with the matrix. Make sure that dangerous or unwanted conditions are not created by these connections.

The features of the L4433A include:

•Non- latching reed switches that can be configured for:

•differential (2- wire) mode, which has two (dual) matrices.

Each matrix is organized in a 4- row by 8- column configuration.

•single- ended (1- wire) mode, which has four (quad) matrices. Each matrix is organized in a 4- row by 8- column configuration.

N O TE	Safety Interlock The Analog Buses of the L4400 series
	instruments are capable of carrying 300V signals. The L4433A
	instrument has a hardware Safety Interlock feature that
	automatically opens the analog bus relays when the associated
	interlock pins on the D-sub connectors (faceplate) lose continuity.
	This prevents signals on the analog buses from being present on
	the D-sub connector pins. Optional terminal blocks available from
	Agilent automatically provide continuity for these interlock pins. If
	cables are used, you must provide continuity for the interlock pins in
	your DUT assembly. See the pinout information later in this chapter
	for the location of interlock pins on each module.
	The L4433A matrix instrument has analog bus relays on Bank 2
	only. Therefore, the interlock pins are present on only the Bank 2
	D-sub connectors.
	Normally, if you attempt to connect to the analog buses without
	a terminal block or cable connected, an error is generated.
	The SYSTem:ABUS:INTerlock:SIMulate command
	allows you to temporarily disable errors generated by the Safety
	Interlock feature and enables the simulation mode. Although Safety
	Interlock errors are suppressed in this mode, the actual analog bus
	relays affected by the Safety Interlock are disabled as long as no
	terminal block or cable is connected to the module.

112 L4400 User’s Guide