Specifications

MedWeld 3000 Catalog Revision 8
July 2002 Page 12 of 72
Multi Timer and Cascade Modules
Description Part or Model Numbers
Multi - 3 Timer & 3 SCR 830-0168V2
Multi - 2 Timer & 2 SCR 830-0478
Multi - 1 Timer & 1 SCR 830-0471
Multi - 1 Timer & 2 SCR 830-0555
Multi - 1 Timer & 3 SCR 830-0556
Multi - 2 Timer & 3 SCR 830-0557
Cascades 120 VAC input switch 24 VAC or DC input switch
Cascade - 1 Timer & 3 SCR 830-0481V120 830-0481V24
Cascade - 1 Timer & 2 SCR 830-0480V120 830-0480V24
Cascade - 1 Timer & 1 SCR 830-0479V120 830-0479V24
Cascade - 0 Timer & 3 SCR 830-0484V120 830-0484V24
Cascade - 0 Timer & 2 SCR 830-0483V120 830-0483V24
Cascade - 0 Timer & 1 SCR 830-0482V120 830-0482V24
Examples: Software: T93300
You want to configure a 6 SCR cascade system using 1 weld module. You would acquire a
Cascade 1 Timer & 3 SCR unit and a Cascade 0 Timer & 3 SCR unit.
You need two timers with each their own SCR but you think that in the future that you may
need to expand to a three timer system. You can acquire the Multi 2 Timer & 3 SCR unit and when you
expand, the third power SCR unit will be in place and you will only need to install a third timer in the
AB SLC 500 rack.
The MedWeld 3005 cascade system coupled with the modularity of the SLC 500 rack
makes these systems the most flexible solutions for the variations of welding
equipment in use today.
You can configure multi-timer controls that are not multiples of three by using dual and single packaging formats. The dual and
singles use the same water-cooling manifold as the Tripack.
You will need one interface cable (205-1212Vx) for each timer. For more information on the cascade system, please refer to the
section “Cascade Weld Control Solutions.
Special Notice for Integrators of Cascade Systems:
The Cascade Selector Unit is available in two versions; one is 120 VAC and the other is for 24 Volts, AC or DC.
Depending on the supply voltage used, the cascade board draws the following current:
Maximum inrush current draw @120VAC is 0.84 A peak for a maximum of 0.75 seconds. This drops off
rapidly to a steady-state value of 27mA.
Current draw @ 24VAC is 17.7mA maximum. There is no inrush current.
Current draw @ 24VDC is 12.5mA maximum. There is no inrush current.
Voltage signal supply is provided either through a dry contact or solid-state relay. For a solid-state relay, the
maximum allowable off-state leakage current is 2mA.