Extron Snap-pac Dc Motor Control 1hp, 240 V Input

US $910

  • Cedar, Minnesota, United States
  • Jun 4th
We got this from the spare parts crib at a nice little candle factory in Iowa. I'm pretty sure it is unused as one of the connectors on the process follower circuit board was never soldered in place and it wouldn't run. A quick fix and it is (literally) better than new! ( At least is was until the control wire I was using slipped out of my hand and arced to the chassis leaving a small pit.) The model # is M8202-04-0727CB. This number does not appear anywhere on the net. The 3 installed modules are Power board: PD1028-0203 Rev B Process Follower board: PD1028-1212 Rev B Run control Relay board: PD1028-0326 Rev A This board includes one 15 ohm breaking resistor while all of the 0326 boards shown on the net have 2 -15 ohm resistors. This unit looks like something I might have asked them to build in the early 80's. A 120 VAC control command is sent to the relay board (from PLC) which disconnects the breaking resistor and applies armature voltage. Then a 4-20 ma signal is sent to the process follower board which then controls the armature voltage. The field voltage is always on. This seems wasteful. The online manuals are dated 1979 but the connections to the modules remain the same. The third module is not included in the on line manual but is just a relay. Picture 3 shows the unit feeding my dummy light bulbs at 4ma and picture 4 is at 20 ma. If you are not using an input signal you can hook a 5k pot to the module and use that. Or, remove the process follower module and hooked up a 5K pot on the power module, and sell the process module on EBAY. Connections: 230 VAC in screws 9 & 10 Field Out Screws 5 & 6 Armature Out Screws 17 &18 Analog signal (-) 13, (+) 15 Jumper 12 to 15 120 VAC Run Signal screws 21 & 22 We include the schematic diagrams for the older modules. 6 lbs. Shipping USPS QZ1602 13

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