Positioners
Digital Valve Controller ND7000
-
・Can be used for rotary and linear actuators
・SIL 2 certified by TÜV (Acc. to IEC 61508)
・Equipped with self-diagnostics
・Equipped with fail safe function (fully closed/fully open)
・Compatible with HART communication
・Enclosure: IP66, NEMA 4X
| Series | Enclosure material | Air connection port | Supply pressure (MPa) | Input current |
|---|---|---|---|---|
| ND7100 | Anodised aluminum alloy and polymer composite |
G1/4 | 0.14 to 0.8 | 4 to 20 mA |
| ND7200 | Anodised aluminum alloy and tempered glass |
NPT1/4 | 0.14 to 0.8 | 4 to 20 mA |
Features
Key Features
・Benchmark control performance on rotary and linear valves
・Reliable and robust design
・The rugged cover protects the unit from environmental hazards and external abuse
・Easy commissioning and operation
・Safety; SIL 2 certified by TÜV (Acc. to IEC 61508)
・Language selection: English, German and French
・Local/remote operation
・Remote mounting (option)
・Equipped with self-diagnostics
Self-diagnostics/Deviation trend/Counters/Extended off-line tests
-
Minimized process variability
・Linearisation of the valve flow characteristics
・Excellent dynamic and static control performance
・Fast response to control signal change
・Accurate internal measurements
-
Easy installation and configuration
・Can be used for linear and rotary valves,
double and single acting actuators
・Simple fast calibration and configuration
using Local User Interface (LUI)
using DTM/EDD in a remote location
using DCS asset management tools
・Low power consumption enables installation
to all common control systems
Mounting on actuators and valves
・Mounted on single and double acting actuators
・Both rotary and linear valves
・Ability to attach options to electronics and mechanics later
・One-point calibration feature enables mounting without disturbing the process
-
Open solution
・The ND7000 can be freely interfaced with
software and hardware from a variety
of manufacturers.
Using this open architecture allows the
ND7000 to be integrated with other field
devices to give higher controllability.
・FDT and EDD based multi-vendor support
configuration
・Support files for ND7000 are available at the
following website: www.neles.com/valves
-
Product reliability
・Designed to operate in harsh environmental
conditions
・Rugged modular design
・Excellent temperature characteristics
・Vibration and impact tolerant
・IP66 enclosure
・Protected against humidity
・Wear resistant and sealed components
・Contact less position measurement
Technical Description
The ND7000 is a 4 to 20 mA powered microcontroller- based digital valve controller.
The device contains a Local User Interface (LUI) enabling local configuration.
The powerful 32-bit microcontroller controls the valve position.
Self-diagnostics
Self-diagnostics guarantees that all measurements operate correctly.
Offline Test
ND7000 diagnostics includes four Offline Tests.
The test results can be compared with earlier tests.
