Emerson FM-3 Guia do Utilizador descarregar pdf (Página 183)

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Epsilon Eb and EN Drives Reference Manual

Figure 120: User Defined Motor Single Ended Feedback Connections

Thermal Switch Interfacing

The drive provides a facility to monitor the motor thermal sensor and shut the drive down in

the event of a motor overtemp condition. This must be connected properly in order to enable

the protection. If your motor does not have a thermal sensor, the sensor input pin needs to be

connected to GND (connect pin 9 to pin 18). The thermal sensor requirements are as follows:

• If a thermistor is used, it must be a PTC (positive temperature coefficient) or it must

increase in resistance as the temperature increases. The cold resistance should be 500

ohms or less. A motor fault will occur when the thermistor resistance reaches

approximately 1.0 kohm.

• Switch Operation: open circuit on temperature rise

• Voltage rating min: 10 VDC

• Current capacity min: 1 mA

Encoder Logical Interfacing

The encoder is expected to provide six logical signals: A, B, Z, U, V and W. Each of these

signals is received at the drive by a differential receiver circuit. For example, the A logical

signal is received as channels A and /A.

Signals A and B provide incremental motor position in quadrature format. Z is a once per

revolution marker pulse. U, V and W are commutation tracks.

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Emerson FM-3 Guia do Utilizador Página 183