Indication Contacts

Introduction

Use indication contacts to view the status of the device remotely. One indicator contact model provides OF, SD, or SDE indication functions. The position of the contact inside the case determines the function.

Indication contacts are located under the front face of the device, in a compartment isolated from the power circuits. There are two types of indication contact:

Standard contact with spring terminals
Low-level contact with screw terminals

For more information about installation, consult the instruction sheet on the Schneider Electric website: NNZ4314501 Indication Contacts.

Standard and Low-Level Contacts

Standard and low-level contacts are the common point changeover type.

NC Normally Closed contact

NO Normally Open contact

The following table describes the operation of standard and low-level volt-free contacts:

Name	Definition
OF open/close indication contact	The OF contact indicates the position of the main contacts of the device (open or closed).
SD trip indication contact	The SD contact indicates that the device has tripped due to: Operation of the push-to-trip button Operation of the MN/UVR undervoltage trip release or MX/SHT shunt trip Overload or thermal protection Short-time protection Instantaneous protection Phase-unbalance protection
SDE electrical fault contact	The SDE contact indicates that the device has tripped on an electrical fault due to: Overload or thermal protection Short-time protection Instantaneous protection Phase-unbalance protection

Name

Definition

OF open/close indication contact

The OF contact indicates the position of the main contacts of the device (open or closed).

SD trip indication contact

The SD contact indicates that the device has tripped due to:

Operation of the push-to-trip button
Operation of the MN/UVR undervoltage trip release or MX/SHT shunt trip
Overload or thermal protection
Short-time protection
Instantaneous protection
Phase-unbalance protection

SDE electrical fault contact

The SDE contact indicates that the device has tripped on an electrical fault due to:

Overload or thermal protection
Short-time protection
Instantaneous protection
Phase-unbalance protection

Operation of the Indication Contacts

The following table shows the position of the indication contacts for each position of the handle and main contacts.

Name	Contact number	Position of the handle and contacts
Handle position	–
Device status	–	OFF	ON	Tripped on electrical fault *	Tripped by MN/UVR, MX/SHT or push-to-trip protection
Main contact position	–	Open	Closed	Open	Open
OF auxiliary contact position	•1–•2	Closed	Open	Closed	Closed
OF auxiliary contact position	•1–•4	Open	Closed	Open	Open
SD auxiliary contact position	•1–•2	Closed	Closed	Open	Open
SD auxiliary contact position	•1–•4	Open	Open	Closed	Closed
SDE auxiliary contact position	•1–•2	Open	Open	Closed	Open
SDE auxiliary contact position	•1–•4	Closed	Closed	Open	Closed

Wiring Diagram

The diagram is shown with circuits de-energized, all devices open, connected, and charged, and relays in normal position.

Indication contacts	Description
OF4/OF3/OF2/OF1	Device ON/OFF indication contacts
SDE	Electrical fault trip indication contact (short-circuit, overload, phase-unbalance)
SD	Trip indication contact