Vaisala MGP261, Инструкция по установке и безопасности

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4. Use a wrench to hold the probe by gripping the tightening nut and open the connection
box by turning the cover counter-clockwise with the connection box key.
Loosen the cable glands and insert the wiring cables into the connection box
before pulling the connection box cover open.
5. Pull the connection box cover open to access the wiring terminals.
Connect or disconnect only de-energized wires. Never open
the connection box in an explosion hazardous area when the device is
energized.
CAUTION!
6. Connect the input, output, and power supply wiring as required in your application. The
wiring diagram in this guide shows an example of wiring the device when all inputs and
outputs are used.
• 6A : Optional external pressure or temperature sensor input wiring (Ex ia): route the
cable to the terminal through the M16x1.5 lead-through, above the component board.
• 6B : Analog output, power supply input and RS-485 wiring: route the cables to the
terminals through the M20x1.5 lead-throughs (1 or 2) from below the component
board.
After connecting the wiring, adjust cable length and attach strain relief.
The optional Ex ia external sensor input wiring ( 6A ) must be
kept separate from the analog output, power supply, and RS-485 wiring
(
6B ). Always use separate cables on each side of the metal barrier.
CAUTION!
7. Close and tighten the connection box (< 0.55 mm cover gap) and cable glands, and
tighten the probe to final tightness on the installation port by turning the tightening nut
with the wrench.
8. Connect the grounding terminal to the grounding rail with a
≥
4 mm
2
wire. In ball valve
installations, lock the valve handle in the open position with the safety pin. When done,
switch on the power supply input.
14 M212238EN-B