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Safe Use Instructions – Emerson DL8000 Preset Controller
Part D301347X412
November 2024
4mm-thick mounting panel. In the event a different
thickness panel is used, select bolts of an appropriate
length in order that when they are fully tightened
without washers fitted, a thread remains free
(therefore, where it is intended to fit washers, even if
they are inadvertently not fitted, a thread remains free
and the bolt will not bottom out). Size the length of the
bolts to satisfy this requirement, and to ensure
maximum engagement for thread strength. The panel
used should be a mild steel member with four 11.5mm
diameter holes located to match the mounting pattern
being used. The steel member may be sheet, angle,
channel, or another shape. Center the forward pair of
mounting screw holes in bottom-mount fixtures no
more than 19 mm from the edge. The case has a 2
taper to the rear. The standard case may need a shim
at the rear pair of screws to level the DL8000. Level the
case to allow for the best conduit alignment. See
Figure
3. Tighten bolts securing the case to the
mounting plate to 24 to 29 N-m.
1. The bottom of the DL8000 enclosure has two 1-inch and
one 2-inch NPSM conduit entries fitted with certified
metric conduit adaptors (one M50 and two M25). From
the front of the DL8000, the left-most entry is intended
for AC power wiring. The other two entrire for DC
voltage circuits. Run rigid metal conduit to these entries
and install conduit seals within 50 mm of the enclosure.
All installation conductors must be rated greater than
90 C.
CAUTION
Ensure that the conduit adaptors are fully sealed prior to
conduit installation. If the provided adaptors are not the
correct size, remove them and replace them with the proper
sized certificated adaptors.
WARNING
Threaded conduit must engage the thread adaptors with a
minimum of 8 full threads. Unused conduit entries must be
plugged with certified conduit plugs. that the conduit
adaptors are fully sealed prior to conduit installation. If the
provided adaptors are not the correct size, remove them
and replace them with the proper sized certificated
adaptors.
Grounding
The DL8000 has one external ground lug and two internal
ground lugs. Refer to
Figures 4
If your company has no specific grounding requirements,
install the DL8000 as a "floating" (unconnected to ground)
system using the ground lug and routing the ground wire
through one of the conduit fittings. Otherwise, follow your
4
and
5
for lug locations.
company's specific grounding practices. However, if you are
making a connection between a grounded device and a
DL8000 EIA-232 (RS-232) port, ground the DL8000's power
supply.
If you must ground the equipment, observe the following
guidelines:
▪
Improper grounding or poor grounding practices can
often cause problems, such as introducing ground
loops into the system. Properly grounding the
DL8000 helps to reduce the effects of electrical noise
on the DL8000's operation and protects against
lightning. Install a surge protection device at the
service disconnect on DC voltage source systems to
protect the installed equipment against lightning and
power surges.
▪
A pipeline with cathodic protection is not a good
ground. Do not tie common to the cathodic part of
the pipeline.
▪
The grounding installation method for the DL8000
depends on whether the pipeline has cathodic
protection. On pipelines with cathodic protection,
electrically isolate the DL8000 from the pipeline. All
earth grounds must have an earth-to-ground rod or grid
impedance of 25 ohms or less, as measured with a
ground system tester.
Wiring to Power
The factory pre-wires the DL8000 internal connections for
the AC I/O module (or modules). Refer to the
Controller Instruction Manual
wiring information.
Wire the DL8000 through the terminal blocks on the front of
each module. The terminal blocks accept wiring 2mm in
diameter/3mm2 or smaller.
To connect the wire to the removable block compression
terminals:
1. Bare the end (6mm maximum) of the wire.
2. Insert the bared end of the wire into the clamp beneath
the termination screw.
3. Tighten the screw.
Expose a minimum of bare wire to prevent short circuits.
Allow some slack when making connections to prevent
strain.
Connect the wiring to the terminal blocks on the I/O and
communications modules. Refer to
DL8000 Preset Controller Instruction Manual
D301244X012) for wiring schematics and explanations.
www.Emerson.com/SCADAforEnergy
DL8000 Preset
(part D301244X012) for field
Chapter 3, Modules, of the
(part
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