ABB LST300 Series, Инструкция по эксплуатации

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L ST 3 0 0 |
CO M PAC T U LT R A S O N I C L E V EL T R A N SM I T T ER | L S T 3 0 0 – EN R E V. E 19
Wiring
Wire the transmitter as follows:
1 Remove the cap from one of the two electrical connection
ports located at both sides in the upper part of the
transmitter housing .
2 If needed, fit various adaptors and bushings to the ½ inch
internal NPT threads of the connection ports to comply with
plant wiring (conduit) standards .
3 Remove the housing cover of field terminals, side . However,
in an explosion-proof installation, do not remove the
transmitter covers when power is applied to the unit .
4 Run wiring through the open port . Connect the positive lead
to the + terminal and the negative lead to the – terminal .
IMPORTANT (NOTE)
Do not connect the power across the test terminals, which
could damage the test diode in the test connection .
5 Plug and seal the electrical ports . Make sure that when the
installation is completed, these openings are properly sealed
against entry of rain and corrosive vapors and gases .
6 If applicable, install wiring with a drip loop . Arrange the drip
loop so that the bottom is lower than the conduit connection
and the transmitter housing .
7 Put back the housing cover, turn it to seat O-ring into the
housing, and then continue to manually tighten the cover
until it contacts the housing metal-to-metal .