On 18 Feb 2013 at 15:07, Steve Gaarder wrote: > The schematic you sent shows pins 9 and 10 connected to the power source > (through a 1 ohm resistor & diode) before the key switch; it matches > mine in > this respect. I'm only speculating that this is done to preserve the > anti-roll ... The DCX-ET manual I have says that pin 9 is the roll-detect logic power, and pin 10 is the precharge input. So, if you connect as shown in the diagramn, B+ goes to these 2 pins through a 1 ohm resistor (and a diode for pin 10). I guess the controller is indeed energized any time the main disconnect is closed. The precharge keeps the controller caps charged. This is the way Curtis recommends connecting their controllers, too - with a precharge resistor across the main contactor. It prevents a large surge when powering up. This is better for the contactor and easier on the controller's caps. David Roden - Akron, Ohio, USA = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = Note: mail sent to the "etpost" address will not reach me. To send me a private message, please use the address shown at the bottom of this page : http://www.evdl.org/help/ = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = = =
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