Lynxspring DR-APUP-N4 SKU: DR-APUP-N4 Login for Pricing Limited Factory Stock Details Lynxspring DR-APUP-N4 : American Auto-Matrix PUP over RS-232 or RS-485 driver. (Approval Required for Purchase) Details Back DetailsLynxspring DR-APUP-N4 : American Auto-Matrix PUP over RS-232 or RS-485 driver. (Approval Required for Purchase)