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 juncti on to case (rjc) [c/w] 1.02 0.63 0.28 maximum i2t for fusing (8.3 msec) [a2sec] 260 1620 6000
input 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 voltage "on"[vdc][p3] 5-32 control must release voltage "off" [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 minimum insulation resistance (@ 500 v dc) 10 9 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
mechanical specifications ramp time in seconds agency approvals ul e116949 rev. 050311
annex - enviromental information
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