Amada Miyachi Unitek STA-100A, Operation Manual, Page: 27 / 154

CHAPTER 2: INSTALLATION AND SETUP
STA SERIES AC CONTROLS
990-351 2-3
Secondary Current Sensing
If you ordered Secondary Current sensing,
toroidal coil(s) were shipped with the Control,
along with cable(s) that attach to the connector(s)
on the bottom of the Control box. Place the
toroidal coil(s) on the secondary of each weld
transformer.
NOTES For MB-400K and MB-800K Coils:

Make sure that the metal buckle on the
toroidal coil is as far away from the
secondary as possible.

For most accurate measurement, do not
distort the shape of the toroidal coil.
Placement of Secondary Current Coils
NOTE: Unless otherwise ordered, Controls are
shipped with the Valve Transformer T3
connected for 460V configuration. If you re-
configure the unit for 230 V, you must change
the jumpers as shown on the right.
Valve Transformer Wiring Connections
Cooling Water Hose Connections
Connect the water, specified in Appendix A, Technical Specifications , using water hoses and ¼-18 NPT
fittings.
Input/Output Signal Connections
Connect the input/output (I/O) signals as shown in the Appendix B, Electrical And Data Connections .