Keysight E1458A 96-Channel Digital I/O Module Service Guide
13
Safety Considerations
General Information
USING AUTOTRANSFORMERS. If the mainframe is to be
energized via an autotransformer (for voltage reduction)
make sure the common terminal is connected to neutral
(that is, the grounded side of the main’s supply).
CAPACITOR VOLTAGES. Capacitors inside the mainframe
may remain charged even when the mainframe has been
disconnected from its source of supply.
USE PROPER FUSES. For continued protection against fire
hazard, replace the line fuses only with fuses of the same
current rating and type (such as normal blow, time delay,
etc.). Do not use repaired fuses or short-circuited
fuseholders.
SHOCK HAZARD. Only service-trained personnel who are
aware of the hazards involved should install, remove, or
configure the Module or expander. Before you remove any
installed module, disconnect AC power from the
mainframe and from other modules that may be connected
to the Module or expander.
CHANNEL WIRING INSULATION. All channels that have a
common connection must be insulated so that the user is
protected from electrical shock. This means wiring for all
channels must be insulated as though each channel carries
the voltage of the highest voltage channel.
MAXIMUM INPUTS. The maximum voltage that can be applied to
any terminal is 42 V Peak. The maximum current on any data line
is
±
48 mA. The maximum current on any handshake line is
±
40
mA.
STATIC ELECTRICITY. Static electricity is a major cause of
component failure. To prevent damage to the electrical
components in the module, observe anti-static techniques
whenever working on the device.
PARTS REMOVAL. This module uses a surface mount assembly.
Special soldering equipment is required for parts removal or
replacement. Use of standard soldering equipment will cause
damage to the PC board and is not covered under warranty.
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