Azbil 100 Series, Руководство пользователя

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2-10
2-5-1. Wiring guidelines
„
Power down before doing any wiring.
„
SVP requires a 4 to 20 mA DC control signal, which also provides power to the unit. SVP
requires a minimum of 3.85 mA DC to operate and current should never exceed 24 mA
DC.
„
The SVP needs protective grounding on either the internal or external grounding terminal
(<100 Ω resistance)
„
Maximum permissible cable length is 1.28 km.
„
Use stranded cables having a conductor cross-section of 1.25 mm 2 and suitable for 600 V
such as shown in the conductor table in Article 310 of the NEC (National Electric Code).
Outside diameter on cables must be 6.35 mm to 11 mm. Use shielded wires for locations
exposed to noise.
„
Avoid installing cables near noise-making devices such as large capacity transformers and
motors. Do not lay signal/control cables in the same tray or duct with noisy switching
power cables.
WARNING
The barriers should be NEPSI certified types and comply with the condition as follows.
AVP100: Ui=30V, Ii=95mA, Pi=0.66W, Ci=6nF, Li=0.2mH
AVP102: Ui=30V, Ii=100mA, Pi=1.0W, Ci=0.015μF, Li=0.2mH
Zener barrier should be installed in safe areas and observe the Zener Barrier Manual.
The circuit shall be considered to be connected to ground from a safety point of view.
When installation and maintenance for the Valve Positioner, user should also abide the
Manual and the relevant requirements of national electrical code GB3836.1-2000 and
GB3836.4-2000.
2-5-2. Wiring procedure
(1) Unscrew the screw on the cover and remove the cover.
(2) Remove one or both of the supplied Azbil Corporation conduit connection blind plugs
depending on how you plan to wire the SVP.
(3) Insert cables into the conduit connection. Strip and attach the appropriate wires to the
terminals, checking for polarity. Crimp contacts with insulated sleeves are recommended.
(4) Tighten the terminal screws fully, to a torque of 1.5 N•m (15 kgf•cm).
(5) Put the cover onto the SVP and fasten the screw.