Meltric DXN Series Operating Instructions

DXN
Rev. A
Meltric Corporation
4640 Ironwood Drive
Franklin, WI 53132
(800)433-7642
www.meltric.com
GENERAL
Meltric's DXN Series plugs & receptacles are
designed and rated for use in hazardous environments
where explosive gases or dusts may be present.
The DXN receptacle has a dead front, which iso-
lates the supply contacts and prevents user expo-
sure to live parts. The safey shutter blocking
access to the contacts can be opened only by DXN
plugs with compatible ratings and contact configu-
rations.
DXN's that are equipped with optional auxiliary
contacts can be electrically interlocked with motor
controllers or other devices when the auxiliary con-
tacts are used as pilot contacts.
RATINGS & CERTIFICATIONS
To ensure the safe use of this product, the installer
must verify that the product is properly rated for the
application.
Electrical
The amperage and voltage ratings are indicated on
the device labels.
Hazardous Duty
DXN plugs & receptacles have both ATEX and
cCSAus ratings for use in hazardous environments.
ATEX – Class 1 Zone 1 AEx ed IIC T6
This rating certifies the product for use in surface
(non-underground) applications where a high level
of protection is required and where the presence of
an explosive atmosphere of any type of gas or dust
is likely to occur. The associated maximum surface
temperature of the product is 85°C, at an ambient
temperature of 40°C.
Coutesy of Gross Automation 1724 South Johnson Road New Berlin, WI PH: 262-446-0000 FAX: 262-446-0300 www.meltricsales.com
cCSAus – Class 1 Division 2 Group A, B, C, D
Class 2 Division 2 Group E, F, G
This rating certifies the product for use in applica-
tions where flammable gases, such as Acetylene,
hydrogen, ethylene or propane, or dusts, such as
magnesium, coal or grain, may be present under
abnormal conditions.
Ingress Protection
DXN's have an IP 66/67 rating for protection
against ingress of water, dust and other matter. IP
66 provides total protection against dust and water
jets. IP 67 adds protection for temporary immer-
sion in shallow water.
These ratings apply when the plug and receptacle
are mated.
alone, provided that its lid is latched in the closed
position. Optional plug caps are available for pro-
viding IP 66/67 protection on unmated plugs.
Issued: 04/15/2005
INSTALLATION
DXN's must be used in conjunction with other
appropriately rated hazardous duty products and
must be installed by qualified electricians in accor-
dance with all applicable local and national electri-
cal codes. Before starting, ensure that the power
is off and verify that the conductors meet the
requirements of the National Electric Code and are
within the capacities of the DXN terminals noted in
Table 1.
Table 1 - Conductor Size Capacity - AWG
Main Contacts
DXN1
DXN3
DXN6
conjunction with appropriate wiring ferrules.
Assembly for In-line Connections
When DXN's are used as in-line connectors, finger
drawplates should be installed on both the receptacle
and plug in order to more easily provide the leverage
required to properly connect the devices.
Threaded
Bushing
Strain
Relief
Compression
Nut
Adjust the bushing diameter to fit the cable by
removing inner sections of it as required. Loosely
re-assemble the compression nut, bushing and
strain relief to the threaded adapter on the end of
the handle and insert the cable through it, the thin
black drawplate gasket and finger drawplate (if
applicable), and the color-coded gasket.
mindful that the strain relief must clamp on the
cable sheath, strip the cable sheath as required to
provide a workable wire length. Then strip the individ-
ual wires to the lengths indicated in Table 2, and
twist the strands of each conductor together.
They also apply to the receptacle
Aux. Contacts
Max Min Max Min
10 20 - -
8 14 12 20
3 10 12 20
Other sizes may be used in
Finger Drawplate Gasket
Adapter
Finger Drawplate
Handle Color-Coded Receptacle
Gasket (or Inlet)
Table 2 - Wire Strip Length - A
DXN1 - All
DXN3 - Main
DXN3 - Aux.
DXN6 - Main
DXN6 - Aux
Back out the terminal screws on the receptacle (or
inlet) far enough (but not completely) to allow the
conductors to pass, insert the conductors fully into
their respective terminals and tighten the terminal
screws with a hand screwdriver to the torque indi-
cated in Table 3.
Table 3 - Recommended Tightening Torques
Terminal
DXN1 10.6 in-lbs
DXN3 10.6 in-lbs
(Main Contacts)
DXN3 10.6 in-lbs
(Aux. Contacts)
DXN6 22.0 in-lbs
(Main Contacts)
DXN6 10.6 in-lbs
(Aux. Contacts)
DXN terminals are spring assisted to prevent
loosening due to strand settlement, vibration and
thermal cycling. Do not over-tighten.
Verify that the cable sheath will extend beyond the
strain relief and into the handle. Assemble the
receptacle (or inlet), the color-coded gasket, the
finger drawplate,and the thin black finger drawplate
gasket to the handle with the four self-tapping
screws provided. (CAUTION – over-tightening
the screws may cause cracking in polymeric com-
ponents). Adjust the cable location so that it will
not be under tension inside the handle and tighten
the compression nut to secure the cable.
Assembly for Mounted Receptacles
(or Inlets)
In applications where DXN receptacles (or inlets)
are mounted to wall boxes, panels or other equip-
ment, optimal operation is achieved when the
device is installed with the latch at the top.
NOTE: If the device is mounted to a wall box,
make sure that appropriate hole plugs are securely
tightened in any unused connection holes.
Being
Insert the cable or wires through the wall box and
cut to allow adequate length, strip the cable
sheath, as desired, strip the individual wires to the
lengths indicated in Table 2, and twist the strands
of each conductor together. Back out the terminal
Inches mm
0.50 12
0.75 20
0.75 17
0.75 20
0.75 18
Torque Flat Screwdriver
1/8" precision tip
3/16" precision tip
1/8" precision tip
3/16" precision tip
1/8" precision tip