Connecting The Instrument - ABB LLT100 Operating Instructions Manual

LLT100
Laser level transmitter
The LLT100 has a ½-inch NPT/M20 cable gland entry. You
must use a ½-inch NPT/M20 cable gland certified to either
Ex db or Ex tb (depending on the installation), and rated to at
least IP66/IP67. The cable glands supplied by ABB are ATEX-
and CE-certified, and meet the above requirements.
These cable glands can only be used with braided shield
cables. When installing them, make sure to fold the cable
shield over the O-ring which presses the braiding against the
inside wall of the body, thus ensuring good contact.
3.3

Connecting the instrument

WARNING
If required by your national electrical code, a circuit
breaker or switch in the building installation, marked as
the disconnect switch, shall be in close proximity to the
equipment and within easy reach of the operator.
WARNING
In an explosion proof/flameproof installation, do not
remove the covers while the instrument is energized.
To bring power to the LLT100:
1. Remove the temporary plastic cap from one of the two
electrical connection ports (see Figure 3).
2. Remove the housing cover on the "terminals" side (see
Figure 3). Refer to the indications on the instrument name
plate.
WARNING
Depending on the model, there may be no EMC
protection or protection against accidental contact when
the housing cover is open. Therefore, the auxiliary power
must be switched off before opening the housing cover.
NOTICE
After an interval of several weeks, increased force will be
required to unscrew the housing cover.
This is not caused by the threads, but rather by the type
of gasket used.
WARNING
Do not handle the instrument by the threaded interface.
Threaded edges are sharp and could cause personal
injuries.
4. Run the cable through the cable gland and the open port.
5. Connect the positive lead to the + terminal, and the
negative lead to the – terminal.
8 User Guide | OI-LLT100-EN Rev. D
Property Damage
Sharp edges
Cable gland
Figure 3 Accessing the terminals inside the LLT100
WARNING
The terminal block needs to be replaced if the
installation shows any sign of damage resulting from
direct or indirect lightning.
6. Plug and seal the electrical ports.
7. (if applicable) Install wiring with a drip loop. Arrange the
drip loop so that the bottom is lower than the conduit
connections and the LLT100 housing.
8. Put back the housing cover. Turn it so as to seat the O-ring
into the housing, then continue to tighten by hand until the
cover contacts the housing metal-to-metal.
WARNING Securing the housing cover in
flameproof/explosion proof areas
Both faces of the electronics housing feature a M4
locking screw (hex-head socket screw) on the bottom
side (see Figure 5).
– Install the housing cover on the housing by hand-
tightening it.
– Turn the locking screw counterclockwise to secure
the housing cover. This involves unscrewing the
screw until its head stops at the housing cover.
9. Once the installation is complete, make sure that electrical
ports are properly sealed against all types of fluid ingress
(rain and/or corrosive vapors or gases).
Unused electrical connection port
with standard metal cap
"Terminals"
cover