American Magnetics 420 Power Supply Programmer - Manual (Page 34)

16 Rev. 7
Installation
Unipolar Supply without Energy Absorber
2.5.1 Unipolar Supply without Energy Absorber
When the Model 420 is used in the single quadrant mode, the magnet
power supply system consists of the Model 420, a unipolar power supply
(typically an AMI Model 12100PS or 12200PS) and associated
interconnecting cabling. The diagram of Figure 2-1 shows this system.
Connect the cabling in the following manner:
a. Connect the positive (POS) power supply lead (1) to the positive
vapor-cooled current lead (2) using 1/4-20 or similar hardware.
Note
The use of locking hardware is recommended for all high current
connections.
Warning
Ensure the protective diode remains installed across the output
terminals of the power supply with the anode at the
1(* ative
terminal and the cathode at the 326 itive terminal. Removal of this
protective diode may cause serious injury to personnel and damage
to the power supply under certain loss of power conditions.
b. Connect the negative vapor-cooled current lead (3) to the positive
(+) shunt terminal (4) on the back of the Model 420.
Caution
Do not overtighten the nuts on the current shunt terminals of the
Model 420 (see the torque specifications on page 7). Overtightening
can result in damage to the terminals.
c. Connect the negative (
−
) shunt terminal (5) on the back of the
Model 420 to the negative (NEG) power supply lead (6).
d. Connect the coaxial cable from the 352*5$0 287 connector on
the back of the Model 420 to the BNC connector attached to the
terminal strip on the rear of the power supply (7).
e. Install an instrumentation cable between the magnet support
stand top plate connector (8) and the magnet station connector J7A
or J7B.
f. Install an instrumentation cable between the LHe/Temp connectors
J8A and/or J8B on the rear of the Model 420 and the Model 13x
Liquid Helium Level Instrument and/or temperature instrument
(9).