Thermo Scientific LevelPRO Series, Руководство по установке

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Thermo Fisher Scientific LevelPRO Installation Guide
4-1
Chapter 4
Wiring
Wiring should be performed in the following order:
1. Power to the gauge
2. Remote computer terminal or HHT to the gauge via the serial
communication ports
3. Optional wiring:
a.
4–20 mA current output
b. Relay contacts
c. Contact closure inputs
d. Remote display
e. Auxiliary 4–20 mA current input
f. Wiring to cascade multiple units
Review the following carefully prior to connecting any wiring.
Warning
Remove all power from the unit before making any connections.
Electrocution can result if power is present.

Warning
All wiring must be done by qualified individuals in accordance
with applicable codes such as the NEC (National Electric Code) ANSI /
NFPA 70 specifications or the Canadian Electrical Code Part 1.

Warning
Do not apply power to the unit in any hazardous area unless the
safety ground is properly wired inside the unit and the cover is properly
installed.

Warning
For hazardous location installations, the cable entries must be
sealed per the installation layout drawing (868502).

Overview
Preparation