Baldor iMN1921 installation manual Analog I/O, Analog inputs

4.4 Analog I/O

The NextMove ST provides:

HTwo 12-bit resolution analog inputs.

HOne 0-11V analog output.

4.4.1Analog inputs

HDifferential inputs.

HVoltage range: ±10V.

HResolution: 12-bit with sign (accuracy ±4.9mV @ ±10V input).

HInput impedance: 120kΩ.

HSampling frequency: 4kHz maximum, 2kHz if both inputs are enabled.

The analog inputs pass through a differential buffer and second order Butterworth filter with a cut-off frequency of approximately 1kHz.

Both inputs are normally sampled at 2kHz. However, an input can be disabled by setting ADCMODE to 4 (_acOFF). With one input disabled, the remaining input will be sampled at 4kHz. In MintMT, analog inputs can be read using the ADC keyword. See the MintMT help file for full details of ADC and ADCMODE.

	NextMove ST			15k
AIN0-	3	120k	-	10k	22nF	-
					10k	+
AIN0+	2		+
		120k					MintMT
						10nF
							ADC.0
AGND	100pF	100pF
	6

Figure 10 - Analog input, AIN0 shown

For differential inputs connect input lines to AIN+ and AIN-. Leave AGND unconnected.

MN1921 Input / Output 4-9