Amada Miyachi Unitek STA-100A, Operation Manual, Page: 79 / 154

STA SERIES AC CONTROLS
990-351 A-
1
APPENDIX A
TECHNICAL SPECIFICATIONS
Specifications
Model Size Weight Maximum Number
of SCRs
STA-100 18” H
X
10” W
X
10” D
(457mm x 254mm x 25.4mm)
35-50 lbs (depends on options) 1
STA-200
30” H x 25.4” W x 12” D
(762mm x 645mm x 305mm )
110-140 lbs (depends on options) 2
ITEMS SPECIFICATIONS
Environmental
Ambient Temperature
Relative Humidity
Maximum altitude 32 – 104ºF (0 – 40ºC)
0% to 95% non condensing
9800 ft. (3000 m)
Electrical Requirements
201 to 270 VAC or 402 to 540 VAC, 60 Hz, single-phase External disconnected device
shall be rated no less than 115% of full-current load.
Cooling Water
Requirements
In accordance with RWMA Bulletin 5-005.04: 1.2 gallons/minute (4.5 liter/minute),
minimum; 90 psi (621 kPa) maximum; 104°F (40°C) maximum.
In addition:

Water temperature should be no less than existing dew point for ambient air
(approximately 70°F (21°C));

Water shall have a pH of 7.0 – 8.0;

Maximum impurity contents shall be:

Chloride 20 ppm;

Nitrate 10 ppm;

Sulfate 100 ppm;

Solids 250 ppm;

Calcium carbonate ppm.
In addition, for the 2200A SCR, the cooling water must always be flowing when voltage
is supplied to the SCR.
Output Power
Valve power
Output Signals
Four user-programmable valve outputs (standard);
Eight additional user-programmable valve outputs (optional).
115 VAC (24 VAC optional) at 150 VA (standard) or
250 VA or 500 VA (optional)
Five outputs, triac, 1 A, 125 VAC max.
Functions are under program control.
Conditions for all Modes
Load Power Factor
Applicable Set Point
Ranges
30-70%, fixed impedance
20-95% of current at 180° conduction angle. (Unit will operate outside these ranges,
but accuracy and regulation specifications will not apply.)