SDTAM Module (MicroLogic 2 M and 6 E-M)

Introduction

An SDTAM module can be used with circuit breakers with a MicroLogic 2 M or 6 E-M trip unit designed to protect motors.

The SDTAM module receives data from the MicroLogic trip unit through an optical link and makes available two outputs assigned to manage tripping due to overload.

Description

A Output terminals

B SDTAM module

C Operating mode adjustment dial

Installation

The slots used to install the SDTAM module depend on the circuit breaker type.

ComPact NSX100-250	ComPact NSX400-630

The SDTAM module cannot be installed at the same time as an MN/MX release and OF contact.

For more information about installation, consult the instruction sheet on the Schneider Electric website: GHD16274AA ComPact NSX100–630 – SDTAM Thermal Fault Module.

Connection

Connect the SDTAM module and the two outputs in strict accordance with the wiring diagram.

The characteristics of the SDTAM module outputs are:

Voltage: 24–415 Vac/Vdc
Current:
- Active outputs: 80 mA maximum
- Idle outputs: 0.25 mA

Output Assignment

Output 1 (SD2/OUT1): normally open, indicates thermal faults.

Output 2 (SD4/OUT2): normally closed, opens the contactor KM.

Outputs are activated 400 ms before the circuit breaker trips in the case of:

Long-time protection
Phase-unbalance protection
Locked rotor protection (MicroLogic 6 E-M)
Undercurrent protection (MicroLogic 6 E-M)

Contactor Control

Contactor control by the output 2 signal (SD4/OUT2) optimizes continuity of service and provides the following additional benefits:

Lower risk of motor deterioration.
Activation of the output indicates that the application is not working normally. Abnormal operation is not the result of an anomaly or internal fault in the motor-feeder.
The cause of this abnormal operation can be temporary (for example, a voltage drop causing an overly long starting time).

When the cause of the overload or unbalance has disappeared, the equipment can be powered up again.

NOTE: To control a contactor with a consumption exceeding 80 mA, it is necessary to provide an interface (RBN or RTBT relay).

Operating Mode

The SDTAM module incorporates an operating mode adjustment dial:

To return the outputs to their initial state following activation:

Manual (SDTAM dial in the OFF position) after canceling the module power supply
Automatic (SDTAM dial on one of the time delay adjustment settings) following a time delay (set from 1 to 15 minutes to allow for the motor cooling time).