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2 Installation
Connecting the Outputs
Binding Posts
Wire Sizing
Keysight N678xA SMU Wiring
Multiple Load Wiring
Positive and Negative Voltages
Load Capacitor Response Times
Protecting Sensitive Loads
Keysight N679xA Load Module input terminals are referred to as "Outputs" throughout
this document.
Binding Posts
SHOCK HAZARD Turn off AC power before making rear panel connections. All wires
and straps must be properly connected with the binding posts securely tightened.
Some power modules generate voltages in excess of 60 VDC. Ensure that instrument
connections, load wiring, and load connections are either insulated or covered so that
no accidental contact with lethal output voltages can occur.
The binding posts accept wires sizes up to AWG 14 in location (A). Securely fasten all wires by hand-
tightening the binding posts. You can insert standard banana plugs into the front of the connectors as
shown in (B). A chassis ground binding post is located on the front panel for convenience.
Maximum current rating: (A) = 20 A
For modules with current ratings > 20 A,
refer to
High-Current Output
Wire Sizing
FIRE HAZARD Select a wire size large enough to carry short-circuit current without
overheating (refer to the following table). To satisfy safety requirements, load wires
must be heavy enough not to overheat while carrying the short-circuit output current
of the unit. Keysight Model N678xA SMU wiring is described in the following section.
Along with conductor temperature, you must also consider voltage drop when selecting wire sizes.
The following table lists the resistance for various wire sizes and the maximum lengths to limit the
voltage drop to 1.0 V per lead for various currents.
58
(B) = 15 A
Connections.
Keysight N6705C User's Guide
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