Schiele DL42N-22 79A Motor Control AC Contactor

Description

Key Technical Specifications

Product Introduction & Supply Chain Strategy

The Entrelec Schiele DL42N-22 is a heavy-duty, 3-pole AC power contactor designed for switching 3-phase asynchronous motors and heavy inductive loads up to 42 kW at 400 VAC. Built with 2NO + 2NC integrated auxiliary contacts, it enables direct hardwired interlocks, status feedback to PLC input cards, and safety circuit matching inside motor control centers (MCC) and industrial automation cabinets.

Because the Schiele DL series is no longer in active production, sourcing this unit as New Surplus protects your plant from sudden stock-outs and costly enclosure panel rewiring. Sourcing uninstalled surplus eliminates the risk of contact pitting, arc chute carbon deposits, and coil insulation degradation common in second-hand or refurbished contactors. Keeping 1–2 backup units on-site safeguards your Total Cost of Ownership (TCO) by ensuring instant drop-in replacements during emergency motor starter failures.

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

1. Execute Lock-Out/Tag-Out (LOTO) on the main 3-phase power line and the auxiliary coil control circuit.
2. Put on grounded anti-static wrist protection and safety glasses before opening the switchgear enclosure.
3. Verify that the replacement contactor’s coil voltage rating (e.g., 110 VAC or 230 VAC) matches your control circuit voltage.
4. Photograph existing main line (L1-L3 / T1-T3) connections and auxiliary contact terminal wiring for exact wire-mapping.

Stage 2: Removal

1. Disconnect incoming main power leads (L1, L2, L3) and load-side motor leads (T1, T2, T3) using an insulated screwdriver.
2. Unwire the control coil terminals (A1, A2) and auxiliary feedback wires (NO/NC blocks).
3. Release the DIN rail retaining latch at the base of the contactor and pull the unit off the 35 mm mounting rail.

Stage 3: Installation (Clone & Seat)

1. Inspect the terminal shrouds and silver alloy main contacts on the new surplus DL42N-22 for physical integrity.
2. Snap the DL42N-22 onto the 35 mm DIN rail until the spring lock firmly engages, or bolt securely to the backplate using mounting screws.
3. Torque the main power terminal screws to manufacturer-specified limits to prevent loose connections and high-resistance arc heating.
4. Reattach auxiliary signal leads according to your recorded wire mapping (2NO + 2NC layout).

Stage 4: Power-On & Testing

1. Apply control power to the coil (A1/A2) without main 3-phase line power energized.
2. Cycle the coil on/off to verify snappy mechanical armature movement and confirm auxiliary status feedback to the PLC.
3. Restore 3-phase power, enable the motor load, and check for balanced current draw across all three power phases.

DL42N-22

DL42N-22

Firmware/Software Versions & Upgrade Notes

• Hardwired Operation: The DL42N-22 is a electromechanical contactor operating purely via electromagnetic coil activation; no internal firmware or software commissioning is required.
• Overload Relay Matching: When pairing with thermal or electronic motor overload relays, ensure the terminal spacing and contact current range match the 79 A AC-3 rating of the DL42N-22 base frame.
• Coil Selection Notice: Ensure replacement coil voltage code matches the original unit (e.g., 230V vs 110V coils). Swapping main contactor assemblies without checking coil specs can damage the control transformer or fail to pull in the contactor armature.

Frequently Asked Questions (FAQ)

Is this Entrelec Schiele contactor brand new or refurbished?

This unit is strictly New Surplus (Original Unused stock). It has never been installed in a motor control center, used on an active manufacturing line, or subjected to contact refurbishment.

Why choose New Surplus over a refurbished contactor?

Refurbished contactors frequently suffer from micro-welding on silver contacts, weakened return springs, and heat-stressed coils. Installing a worn contactor risks phase imbalance, contact chatter, or single-phasing your motor—leading to motor winding burnout that far exceeds the cost of a new surplus unit.

Can I mount this contactor on a standard DIN rail?

Yes. The features an integrated universal mounting foot that snaps directly onto standard 35 mm DIN rails or bolts directly to an enclosure backpanel.

What is the auxiliary contact configuration on the ?

The comes standard with 2 Normally Open (2NO) and 2 Normally Closed (2NC) integrated auxiliary contact sets, providing built-in flexibility for electrical interlocking and PLC status monitoring.

What warranty applies to this New Surplus contactor?

All New Surplus Entrelec Schiele contactors carry a full 1-year functional replacement warranty from the date of purchase.