640-0850 | American Power Conversion | PCB SUPRVSRY NETWRK RS422 CARD | Code: 640-0850, PCB SUPRVSRY NETWRK RS422 CARD, please visit manufacturer website and select your region or go to shop: http://www.apc.com/shop/us/en/categories and write into search box: PCB SUPRVSRY NETWRK RS422 CARD or 640-0850. | $ | |