Field ISA100 Wireless compliant System/ Security Manager. FWNM – Wireless Network Manager ISA100 Wireless License: 50-200 ISA100 Wireless field instruments. This verison is a standalone Field Wireless Gateway. Full lisence supports up to 20 access Points (mesh subnets). Software upgrade available. Supports monitoring and control. Includes features tailored specifically for safety using PROFINET/safe Over-the-air provisioning protected by additional security features