MCS Series
Microprocessor based soft-start / soft-stop controller
Ratings from 25A to 90A @ 48-530 VAC
Low-voltage, current, or potentiometer control
Output status indicator
Adjustable ramp rates
PRODUCT SELECTION
Line Voltage 25 A 50 A 90 A
120 Vrms MCST1225 MCST1250 MCST1290
240 Vrms MCST2425 MCST2450 MCST2490
480 Vrms MCST4825 MCST4850 MCST4890
AVAILABLE OPTIONS
OUTPUT SPECIFICATIONS (voltage)
Description 120 VAC 240 VAC 480 VAC
Operating Voltage (47-63Hz) [Vrms] 48-140 180-280 300-530
Transient Overvoltage [Vpk] 400 600 1200
Maximum Off-State Leakage Current @ Rated Voltage [mArms] 5 7 12
Minimum Off-State dv/dt @ Maximum Rated Voltage [V/sec] 200 200 200
OUTPUT SPECIFICATIONS (current)
Description 25 A 50 A 90 A
Maximum Load Current [Arms] 25 50 90
Minimum Load Current [mArms] 150 150 150
Maximum Surge Current (16.6ms) [Apk] 250 625 1200
Maximum On-State Voltage Drop @ Rated Current [Vpk] 1.6 1.6 1.6
Thermal Resistance Junction to Case (Rjc) [C/W] 1.02 0.63 0.28
Maximum It for Fusing (8.3 msec) [Asec] 260 1620 6000INPUT SPECIFICATIONS (1)
Description DC Control
Control Voltage Range (VDC) 8-32
Input Current Range [mA] [P1] 28-30
Nominal Input Impedance [Ohms] [P3] 30K
Control Must Operate VoltageO[VDC][P3] 5-32
Control Must Release VoltageOf [VDC][P3] 0-4
Input Current [mA][P3] 0-2.6
Analog Range Option A [VDC][P4] 0.5-5
Analog Range Option B [VDC][P4] 1.25-7
Analog Range Option C [VDC][P4] 2-10
Analog Range Option D [VDC][P4] 4-20
Nominal Input Impedance Option A,B,C[ohms][P4] 20K
Nominal Input Impedance Option D [ohms][P4] 220
GENERAL SPECIFICATIONS
Description Parameters
Minimum Power Factor (with Maximum Load) 0.5
Dielectric Strength, Input/Output/Base (50/60Hz) 4000 Vrms
9
Minimum Insulation Resistance (@ 500 V DC) 10 Ohm
Maximum Capacitance, Input/Output 10 pF
Ambient Operating Temperature Range -20 to 80C
Ambient Storage Temperature Range -40 to 125 C
Weight (typical) 3.0 oz (86.5g)
Encapsulation Thermally conductive Epoxy
Terminals-Power Screws and Saddle Clamps Furnished, Unmounted
Terminals-Control Barrier Strip Screw Terminals
Recommended Terminal Screw Torque Range:
8-32 Screws -20 in. lbs.(Screws dry without grase)
Input Connections via Screw Type Barrier Strip
GENERAL NOTES
1) Voltages are reference to GND (Ground = 0 VDC) P2
OUTPUT STATUS FUNCTIONS
Conditions LED Status
Initial Logic Supply On Flash Once
Load Voltage Missing / Load Open (w/control P3 disabled) Flash Once Intermittenly
Load Voltage Missing / Load Open (w/control P3 enabled)) Off
Ramp Time (Soft Start upon P3 Enabled) Off to Bright
Ramp Time (Soft Start upon P3 Disabled) Bright to Off
Output ON (Normally Steady Operation) On
THERMAL DERATE INFORMATION