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  GENERAL

PXN12c/DXN25c/DXN37c plugs and receptacles 

comply with international and European safety 

rules and particularly with ATEX 94/9/CE Directive.  

PXN12c/DXN25c/DXN37c products can be used in 

zones 1, 2 (Gas), and 21, 22 (Dust).

There are inherent dangers 

associated with electrical pro-

ducts. Failure to follow safety precautions can result 

in serious injury or death. These instructions must be 

followed to ensure the safe and proper installation, 

operation and maintenance of the Meltric devices. 

Before installation, disconnect all sources of power to 

the circuit to eliminate the risk of electrical shock. It is 

imperative that Meltric explosion-proof multicontact 

plugs and receptacles are connected or disconnected 

without a load in a de-energized state.

  INSTALLATION

 PXN12c/DXN25c/DXN37c plugs and  

recep tacles must be used in conjunction with  

other appropriately rated hazardous duty  

products and must be installed by qualified  

electricians in accordance with all applicable  

local and national electrical codes.

Assembly

Optimum operating conditions are achieved by instal-

ling PXN12c/DXN25c/DXN37c plugs and receptacles 

with the latch at the top.

Wiring

 Before starting, verify that the power is off, that 

the product ratings are appropriate for the  

application, and the conductors meet code  

requirements and are within the capacities of  

 the terminals noted in Table 1.

The maximum cross-section of the conductors is 

4934 CM (2.5 mm

2

) (solid or flexible). Conductors 

must be  stripped by .315 in (8 mm).

  1.   Contacts can be soldered or crimped.  If  

crimping, crimp the contact with a KNIPEX  

crimping tool part # 61-CA500 or a GREENLEE  

crimping tool part # 45505. Use the 4 mm

2

  

footprint whatever the conductor cross-section.   

Perform a double crimping with a 90° rotation, in  

compliance with IEN 60352-2.

  2.      Prior to soldering or crimping a heat shrink 

sleeve (supplied- part  # 9CP0250) must be  

slipped over each conductor or alterna-

tively an insulating sleeve (supplied - part # 

9SES201007301) can be used but the insulating 

sleeve must be installed using sleeve tool  

61-CA500 (sold separately).

  3.   If soldering use tin solder and a 50 W soldering  

iron.  Insert the conductor in the terminal and  

heat the terminal for about 30 s.  During heating,  

insert the solder wire in the hole at the foot of the  

terminal and let the solder penetrate by capillary  

action.  Let the terminal cool without any tension  

on the conductor.

  4.   Slip the heat shrink or insulating sleeve over the  

whole visible part of the contact, down to the molding.

  5.   Slide the heat-shrink sleeve up to the shoulder of 

the contact.  With a heat gun, apply heat evenly  

370° around the sleeve until it shrinks around the  

terminal and wire.

NOTICE:

 For a proper clamping, the use of PVC 

cables is not recommended.

WARNING:

 This product must be electrically groun-

ded to Earth. A grounding terminal is provided on all 

metal accessories.

Contact Assembly/Disassembly

Once wired, contacts must be inserted through the 

rear of the interior moulding  1.  Push each contact 

fully home.  Check its proper engagement by a light 

pull  2.  Contacts can be removed with the supplied 

tool: insert the tool through the front  3  and push fully 

home  4.  Tool part # 9-LD12-37.

Contact Configurations

This is in reference to different keying positions on 

the PXN12c.  If or when 2 contacts are not in use, 9 

different contact/keying configurations can be achieved 

by plugging the contact holes not in use with the hole 

plugs supplied.

  OPERATION

To ensure safe and reliable operation, Meltric 

plugs and receptacles must be used in  

accordance with their assigned ratings.  

Meltric plugs & receptacles can only be used in 

conjunction with mating receptacles or plugs manu-

factured by Meltric or another licensed producer of 

products bearing the                     

TM

 technology trade-

mark.  

WARNING:

 PXN12c/DXN25c/DXN37c plugs 

and receptacles must be operated in compliance with 

its explosion-proof classifications. 

When not in use, the receptacle is shielded by a pro-

tective lid preventing the entry of dust and  moisture.

This is held in the closed position by one or two 

latch(es).  To release the spring-loaded lid, depress 

the latch(es).

DXN25c/DXN37c

To connect, align the plug bayonets with the hollow 

part of the receptacle. Insert the plug and turn until 

the stop.  The plug is in the rest position, circuit 

is open, figure  1.  Push the plug fully home until 

latched, figure  2.  To disconnect, depress the latch.  

The plug returns to its rest position, figure  3.  Turn 

the plug in the opposite direction to remove it.  Shut 

the receptacle lid, figure  4.

PXN12c

Cable

Terminal

Heat Shrink Sleeve or

Insulating Sleeve

Solder

Molding

Câble

Contact

Manchon d’isolement

Soudure

Isolant

PXN12c

DXN25c

DXN37c

OPERATING INSTRUCTIONS

Meltric Corporation / 4765 W. Oakwood Park Drive Franklin, WI 53132
Tel. : 800 433 7642 / Fax : 414 433 2701 / e-mail : mail@meltric.com 

INSPXNDXNMULTI F

A manufacturer of products using Marechal technology

meltric

.com

WARNING

DANGER

CAUTION

NOTICE

ADVERTENCIA

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AVISO

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Table 1 — Wiring Terminal Capacity* (in AWG)
 

 Contacts 

 

Device 

Min  

Max

 

DXN25c 

16   14

DXN37c 

16   14

1

2

3

4

5

1

2

3

4

Contact

Tool

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