Curtis 1352 handleiding
Handleiding
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2 — INSTALLATION AND WIRING
pg. 11
Return to TOC Curtis 1352 eXm Manual, June 2021
Analog inputs
e three analog inputs can easily be congured for use with potentiometers, pressure sensors,
temperature sensors, and resistive sensors (like RTDs). Each input is read 1000 times per second by
a 12-bit ADC and ltered to provide a clean signal. e voltage reading is returned over the PDO in
hundredths of a volt, so 30 volts at an analog input will be read back over the TPDO1 (TX) as 3000.
ANALOG INPUT SPECIFICATIONS
SIGNAL NAME PIN
OPERATING
VOLTAGE
INPUT
IMPEDANCE*
PROTECTED
VOLTAGE RANGE
ESD
TOLERANCE
Analog Input 1 6 0 to 30 V 20 kΩ;
10 kΩ with pull-up
enabled
– 1 V to B+ ± 8 kV
(air discharge)
Analog Input 2 7
Analog Input 3 8
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Analog Inputs 1 and 2 have a pull-up resistor that can be programmed to provide a low voltage at the
input. is allows the ADC to read resistive values, as the external resistance to ground will provide
a divider with the internal pull-up. e pull-up is 10 kΩ to ≈ 4.4 volts. e pull-up is turned on by
setting the correct bit in the Analog Source Enable parameter. e eXm will send back a reading of
the external resistance in ohms. e maximum resistance that can be measured is 6.5 kΩ. An open
pin will read 65535 (FFFFh).
ese analog inputs can also be used simultaneously as virtual digital inputs. ese virtual digital
inputs are created by comparing the filtered analog signal to the the High and Low Threshold
parameters. ese parameters also provide hysteresis. Once the signal goes above the High reshold
and is sensed as On, it must pass below the Low reshold to be be considered O; simply going
below the High reshold is not enough. e same is true for a Low to High transition. Note that
the thresholds are always set in voltage; therefore if the Analog Source Enable (pull-up) is set to On
for any channel, the thresholds must be below 4.4 V in order to be active.
Power
e power pins are each capable of carrying up to 9A when using 16 AWG wire. Every application
must use B+ (pin 3) and at least one of the B– connections (pins 1 and 2).
Since the eXm’s six drivers can sink a maximum combined load of 18 A, you will need to determine
the application’s maximum total loading on B–. To prevent the pin from overheating, the proper wire
gauge must be used* and, if the load is greater than 9 amps, both B– pin connections are required.
If it is determined that both B– pins are required, you must also determine the load on B+. is
requires either knowledge of the expected PWM or actual in-application measurements. The
combined average current recirculating through the B+ pin cannot exceed 9 amps. is can be an
issue if the inductive loads are specied at a lower voltage than the battery supply as the applied
PWM would normally be reduced to not exceed the average applied voltage or current. e lower
PWM in turn raises the average current owing through the B+ pin as the load current recirculates
for a great portion of the PWM period.
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*18 AWG is limited to 7.3 Amps. 20 AWG is limited to 6.6 Amps.
Bekijk gratis de handleiding van Curtis 1352, stel vragen en lees de antwoorden op veelvoorkomende problemen, of gebruik onze assistent om sneller informatie in de handleiding te vinden of uitleg te krijgen over specifieke functies.
Productinformatie
| Merk | Curtis |
| Model | 1352 |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 5176 MB |
