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| Foundation Fieldbus H1, G2-2 Fieldbus Electronics |
Foundation Fieldbus H1 is an open protocol governed by the Fieldbus Foundation�. Intended primarily for process control applications, it is designed to easily integrate field level devices such as transmitters and actuators over a digital communication network running at 31.25 Kbit/s.
The General Purpose I/O (GPIO) mode of this communication module can control up to 32 digital Inputs and 16 digital Outputs. Outputs can be any combination of the integrated manifold�s valve coils and discrete output modules. This mode is perfect for automating process valves over an FF network where enhanced diagnostics are not required. The Valve Monitoring System (VMS) function of this mode emulates 8 separate FF enabled valve position indicators. This function has the ability of automating 8 process valves over 1 FF node while retaining the complete diagnostic capability of 8 separate FF nodes. Enhanced diagnostic capability of this function allows automatic monitoring of Travel Times, Break Times, Lost Position, Cycle counter and Auto Calibration. GPIO and VMS functionality can coexist on the same manifold. The maximum digital I/O count is 32 Inputs and 16 Outputs. VMS functionality allocates 2 digital Inputs to every valve station so a maximum of 8 valves and 16 inputs are allowed with this function. The remainder can be allocated as GPIO.
The optional �Logic Transducer� mode allows user to write local logic to be executed independent of DCS.
NOTE: When specifying valve position indication as inputs into the valve manifold input module use gold contact mechanical switches. ASCO VMS switch code �H2� signifying 2 mechanical SPDT gold contact switches.
Example: HS2D1YCH2NGA
http://www.ascovalve.com/Applications/Products/PositionIndicators.aspx
Standard Specifications:
- Node Power: 24 VDC
- Valve & Discrete I/O: 24 VDC
- Temperature Range: -10� to 115�F (-23� to 46�C)
- Humidity: 95% relative humidity; non-condensing
- Moisture: NEMA 4/ IP 65
- Maximum solenoid outputs: 16
- Maximum Discrete I/O Points: 32 Inputs / 16 Outputs
- Supported Baud Rates: 31.25 kbit/s
For more information, please contact a Numatics Distributor near you!
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