VTI Instruments Ametek EX1200A Series, User Manual

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EX1200A Triggering 75
LED Indicators section of Section 3).
F
IGURE
4-1: I
NPUT
P
IN
L
OCATIONS AND
S
IGNALS
Standard banana plugs can be used to interface other external instruments with the DMM. The
fuse located on the front panel is for current input protection and is user-replaceable. It is a 3.15 A,
250 V fuse and can be replaced with VTI P/N: 35-0054-315.
NOTE Use sheathed-type probes for voltage and current measurements at the front panel of DMM.
Rear Panel Connector
Mainframes with an EX1200A DMM installed provide an onboard DMM with a five-line analog
bus routed through the backplane to the DMM. This bus is available through rear panel DMM Bus
connector that can be used to extend the analog backplane to other EX1200A series mainframes.
To ensure high signal integrity, environmental noise and cable length should be accounted for
prior to routing these lines.
CAUTION When voltages are switched across the backplane using a multiplexer or matrix switch card, these
voltages are present on the DMM Bus connector. Caution must be observed when handling this
connector.
Also, when the DMM bus is extended to other EX1200A mainframes, the user must ensure that no
two devices are using the bus simultaneously.