Array electronic 3750A, Manual

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Chapter III Installation
55
ARRAY
1. The external trigger input terminal is a BNC connecting terminal, in which the middle part is
input + and the outer case is the input-. It receives 5V TTL-compatible falling-edge trigger
signals. In order to get a reliable trigger, the duration time of low level hold be longer than
10us.
2. The current monitoring output terminal: when connecting the oscilloscope, it can monitor the
realtime state of the current (The terminal and the communication terminal share the common
ground, and the terminal has the insulation voltage 3000VAC with the load input terminal.).
3.6 Wiring
Description: The rear panel input terminals accept up to M8-sized crimped terminal and equipped
with a pairs of lugs.
Procedures:
1. Turn off the power;
2. Turn off the DUT power;
3. Connect the load wires to the input terminal:
Connect the positive (+) terminal on the load module to the high potential output of the
DUT.
Connect the negative (-) terminal on the load module to the low potential output of the
DUT.
Wiring
Wire Gauge (AWG): Before connecting the unit to the power source, the wire gauge must be
taken into account. The load wires must be large enough to resist the overheating when a
short-circuit condition occurs as well as to maintain a good regulation. The size, polarity and
length of a wire are all factors in determining if a wire will withstand short circuit. Wires that are
selected must be large enough to withstand a short circuit and limit voltage drops to no more than
1V per wire. Use the table below to help make a suitable selection.
Load wiring AWG table:
AWG Gauge Diameter (Unit:
mm)
Ohms Per km(
Ω/km
) Max Amps for Classis
wiring