Marechal DSN37C Plugs, Sockets & Multi-Contact Connectors 16A 480V

Product Overview

Marechal DSN37C Plug & Socket Connector

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Marechal DSN37C Plugs, Sockets & Multi-Contact Connectors are compact, high-performance connectors designed for signal and control applications across industrial and hazardous area environments.

Marechal DSN37C Description

Offering up to 37 contacts, the DSN37C provides safe, quick and watertight power disconnection — ideal for automation systems, control panels, solar photovoltaic (PV) installations and other demanding electrical applications.

Rated at 16A and 480V, the Marechal DSN37C Plug & Socket delivers outstanding reliability and safety. Its IP66/IP67 watertight protection ensures consistent performance in wet, dusty or corrosive environments, with a rubber sealing ring maintaining a secure and waterproof connection when closed.

The Marechal “Decontactor” design integrates a built-in load-break switch, enabling safe disconnection under load and protecting personnel and equipment during maintenance or plant operations.

Manufactured with impact-resistant GRP (glass-reinforced polyester) housing, the DSN37C offers mechanical strength and long service life. Its silver-nickel butt contacts guarantee reliable conductivity, while metallic braid shielding provides superior electromagnetic compatibility (EMC).

The Marechal DSN Multi-Contact Connector range includes wall-mounting sockets, inlets, outlet boxes, handles and adaptors, available in multiple contact configurations for low-voltage (LV), medium-voltage (MV) and control wiring.
A full range of Marechal accessories, sleeves, boxes and handles is available for complete system integration.

Contact our experts – order or find out more about the DSN37C and our complete range of
Marechal Plugs, Sockets & Connectors for your operations.
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MARECHAL DSN37C SOCKET OUTLETS & INLETs

The DSN37C is available in GRP with 37 contacts for use with a maximum of 480V for both female socket outlets and male inlet plugs.

Marechal DSN37C Accessories & Options

The Marechal DSN37C Connectors (plug and socket outlets with integral power switch) are supported by an ancillary range of wall mounting sockets, wall boxes, socket outlets, sleeves, inlets and handles.

DSN37C Install & Operation Guidelines

Marechal DSN37C Plugs | Install & Operation Guide

• Install the socket-outlet facing downwards to prevent ingress of foreign bodies and the latch at the top to ease operation. See Figure C1. The latch can also be on the side in case of risk of accumulation of foreign bodies inside the cover.
• Install the appliance inlet as far as possible with the catch at the top to ease the operation of the connector. Connectors with lids opening at 180º may be used. See Figure C2. When this is not possible, install the inlet with the catch at the bottom. See Figure C3.
• Remove an adequate length of cable outer sheath according to the accessory used. Ensure that the cable sheathing extends through the cord grip into the handle or box as required to achieve the intended sealing and cord gripping performance.
• Strip the conductor insulation to the length indicated in Table T1.
• Fully insert the stripped conductor and its wiring lug (for conductors below 2.5mm²) into the contact hole.
• Crimp the contact with a KNIPEX crimping tool P/Nº 61CA500 or a GREENLEE crimping tool P/Nº 45505. Use the 4mm² footprint whatever the conductor cross-section. Perform a double crimping with a 90º rotation, in compliance with IEC 60352-2.
• Conductors can also be soldered: using tin solder and a 50W soldering iron, heat the terminal for approximately 30 seconds while heating, apply the soldering wire into the hole at the bottom of the terminal and let it penetrate by capillarity action. Let it cool down without any mechanical stress.
• Before wiring, equip each conductor with a heat-shrink sleeve or an insulating sleeve (bag of 13 pieces P/Nº 61CA083). Sleeving pliers (P/Nº 61CA400) are required to slip the insulating sleeve over the conductor.
• Slide the insulating sleeve up to the shoulder of the contact.
• Slide the heat-shrink sleeve up to the shoulder of the contact. With a heat gun, apply heat evenly 360º around the sleeve until it shrinks around the terminal and wire.

Figure F1:
A: Insulating sleeve or heat-shrink sleeve
B: Conductor
C: Retaining clip
D: Contact

If necessary, crimp the supplied Earth conductor in the Earth contact.

Contact Assembly / Disassembly – See Figure F2
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: push the contact towards the front (3) and insert the tool through the front (4). Push the tool until the stop (5).

Figure F2:
D: Contact
E: Insulator
F: Tool

Tension Cord

The release of the latch is performed by a tension cord. One end of this cord must be attached either to the flexible cable or to a suitable fixed point of the installation. The other end is attached to the latch release mechanism.

Latch Release Mechanism

This mechanism comes in two different types:

• Ejecting Connector: The retaining latch is directly activated by the tension cord in case of traction (Figure E1).
• Ejecting Plug: A shark-fin mechanism (Figure E2) is assembled on the plug. It releases the retaining latch of the socket-outlet in case of traction on the tension cord.

Eyelet

Handles are equipped with an eyelet. This eyelet allows an optimal pulling angle of the tension cord on the latch release mechanism. See Figure E3.

Assembly

The end of the tension cord that must be attached either to the flexible cable or to a suitable fixed point of the installation is equipped with a loop. A crimping ferrule is supplied to loop the other end of the cord, once it has been passed through the handle eyelet, the latch release mechanism, and cut to the adequate length. See Figure E3.

Cable Tie

A cable tie is supplied, to attach the loop of the tension cord onto the flexible cable.

Keyings

When 2 contacts are not used according to Table T2, nine keyings can be achieved by blanking two contact holes – socket-outlet/connector side – with two caps (supplied).

Sealing Rings

Insert a sealing ring between the device and its rear accessory (handle, angle, etc). The two protrusions of the rings must be positioned on the latch side for the socket-outlet/connector and on the catch side for the plug/appliance inlet. On self-ejecting plugs, the colour-coded ring is replaced by a flat gasket.

Operation

• The socket-outlet is shielded by a protective lid held in the closed position by a latch. Depress the latch to release the lid. See Figure F3.
• To connect, align the red marks on the housings. Insert the device and turn clockwise until the stop. The device is in the rest position, circuit open.
• Push the device fully home until latched.
• To disconnect, depress the latch. The device returns to its rest position.
• Turn the device in the opposite direction to remove it. Shut the lid.

Read Blog: High Temperature Plugs For Critical Heat Resistant Applications

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