MN1957 Input / Output 4-3
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4.2 Analog I/O
The NextMove ESB-2 provides:
Two 12-bit resolution analog inputs.
Four 12-bit resolution analog outputs.
4.2.1 Analog inputs
The analog inputs are available on connector X12, pins 1 & 2 (AIN0) and 4 & 5 (AIN1).
Differential inputs.
Voltage range: ±10 V.
Resolution: 12-bit with sign.
Input impedance: 120 kΩ.
Sampling frequency: 4 kHz maximum, 2 kHz if both inputs are enabled.
The analog inputs pass through a differential buffer and second order low-pass filter with a
cut-off frequency of approximately 1 kHz.
Both inputs are normally sampled at 2 kHz. However, an input can be disabled by setting
ADCMODE to 4 (_acOFF). With one input disabled, the remaining input will be sampled at
4 kHz. In Mint, analog inputs can be read using the ADC keyword. See the Mint help file for
full details of ADC, ADCMODE and other related ADC... keywords.
Figure 2: Analog input, AIN0 shown
For differential inputs connect input lines to AIN+ and AIN-. Leave AGND unconnected.
Mint
ADC.0
+15V
NextMove ESB-2
AIN0-
2
X12
1
3
AIN0+
AGND
-15V
-
+
-
+
Servo Systems Co. • 115 Main Road • P.O. Box 97 • Montville, NJ,
07045-0097 • (973) 335-1007 • Toll Free: (800) 922-1103
Fax: (973) 335-1661 • www.servosystems.com
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