The Westlock Modbus Intellis I/O module, the MPAC, uses the Modbus RTU protocol to communicate serially with a DCS or PLC via the Westlock NIM (Network Interface Manager). The Modbus protocol establishes a common format for the layout and contents of all message fields. Operating commands, sent via Modbus, communicate through the NIM gateway to up to 1000 control valves connected, on a common data highway.
Up to 1000 Westlock Modbus slaves can be connected to a single Modbus port via the NIM (Network Interface Manager); Network interface, position sensors, terminal strips, solenoid and enclosure integrated in a single cost effective package; Fully encapsulated Modbus MPAC electronics module contains solid state limit position sensors; Remote I/O configurations available; Valve performance diagnostic information and alarms developed by MPAC slave; Telanetics valve diagnostic software package included with NIM
High performance engineered resin enclosure with clear cover option or powder coated low copper content aluminum enclosure; 316 stainless steel enclosure available as an option; FM & CSA approved as General Purpose NEMA 4, 4X, 7 & 9, Nonincendive for Class I, Division 2, Groups A-D or Explosion Proof for Class I, Division 1, Groups B-D; An impact and corrosion resistant valve position Beacon? visual indicator