Galil Motion Control DMC-42 0 Series, User Manual

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-LAEN Option:
The standard configuration of the AEN signal is TTL active high. In other words, the AEN signal will be high when
the controller expects the amplifier to be enabled. The polarity can be changed when using a Galil Interconnect
Module. To change the polarity from active high (5 volts = enable, zero volts = disable) to active low (zero volts =
enable, 5 volts = disable), replace the socketed IC, 7407, with a 7406. These IC’s are labeled U6 on the ICM-1900
and U2 on the ICM-2900 and can be accessed by removing the cover. This option can be requested when ordering
the unit by specifying the -LAEN option.
-Changing the Amplifier Enable Voltage Level:
To change the voltage level of the AEN signal, note the state of the resistor pack, labeled RP1 on the ICM-1900 /
ICM-2900. When Pin 1 is on the 5V mark, the output voltage is 0-5V. To change to 12 volts, pull the resistor pack
and rotate it so that Pin 1 is on the 12 volt side. If you remove the resistor pack, the output signal is an open
collector, allowing the user to connect an external supply with voltages up to 24V.
Chapter 3 Connecting Hardware ▫ 35 DMC-42x0 User Manual