Agilent Technologies L4400 Bedienungsanleitung PDF herunterladen (Seite 2)

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Figure 1. L4421A 40-channel armature multiplexer with low thermal offset (bank 2).

Switch features for ﬂexible

and reliable connections

Connect one of many different points

to a single point or create your own

custom conﬁguration with multiple

switch closures. When conﬁgured as a

multiplexer, the L4421A features "break

before make" connections to ensure

that no two signals are connected to

each other during a scan.

The sequence feature deﬁnes switch

sequences and controls complex signal

routing to ensure the order of switch

closures. Assign a sequence, give it

a name and then execute it with the

custom name you created.

External trigger capabilities make it

easy for you to time and synchronize

measurements and other events. The

external trigger can be used to deter-

mine the beginning or end of data to be

acquired.

The L4421A also includes a relay coun-

ter to monitor and help predict when

relays are nearing their end of life.

Easily route signals to an

external DMM

The L4421A switches support signals

up to 300 V and 1 A so that no external

signal conditioning is required. The

34921T features a built-in thermocouple

reference that allows for scanning

temperature measurements with an ex-

ternal DMM. The analog bus connector

can be used to easily route your multi-

plexed signals to an external DMM.

Hardware handshake with an external

DMM is supported through a channel

closed trigger output and a channel

advance trigger input.

System connections you can trust

The L4421A comes with 2 heavy duty

50-pin Dsub connectors that allow for

simple, reliable connections. Each con-

nector uses 30 micro-inches of gold to

ensure a repeatable, accurate measure-

ment. Other connection options include:

• Detachable terminal blocks with strain

relief

• Low-cost, standard 50-pin Dsub connec-

tor kits and cables

• Mass interconnect solutions

Ethernet connectivity enables simple

connection to the network and remote

access to measurements

The Ethernet interface offers high-

speed connections that allow for

remote access and control. You can

set up a private network to ﬁlter out

unwanted LAN trafﬁc and speed up the

I/O throughput, or take advantage of

the remote capabilities and distribute

your tests worldwide. Monitor, trou-

bleshoot, or debug your application

remotely. Ethernet communication also

can be used with the support of LAN

sockets connections.

The optional GPIB interface has many

years of proven reliability and can be

used for easy integration into existing

applications. The L4421A ships with

the Agilent E2094N I/O Libraries Suite

making it easy for you to configure

and integrate instruments into your

system — even if your system

includes instruments from multiple

vendors.

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