GE Harris Westronic WESDAC D20 S WESTERM D20 Input Module Used GPP. GE Harris Westronic WESDAC D20 S. Interface Module. 64 Point Input Module.. Condition: Used : An item that has been used previously. The item may have some signs of cosmetic wear, but is fully operational and functions as intended. This item may be a floor model or store return that has been used. See the seller’s listing for full details and description of any imperfections. See all condition definitions , Seller Notes: “Used. Good condition with minor wear and scratch marks.” , 。