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40 • Chapter 3 Connecting Hardware DMC-3425
to the ground, GND, of the interconnect and connect the GND of the interconnect to the GND of the
amplifier.
37 - 40
Pin Cable
ACMD
AMPEN
GND
ICM-1460
+5V+12V
SERVO
MOTOR
AMPLIFIER
7407 Open Collector
Buffer. The Enable signal
can be inverted by using
a 7406.
Analog Switch
Connection to +5V or +12V made through
jumper location JP1. Removing the jumper
allows the user to connect their own supply to
the desired voltage level (Up to24V).
DMC-3425
Figure 3.1 - Connecting AEN to the motor amplifier
TTL Inputs
As previously mentioned, the DMC-3425 has 3 uncommitted TTL level inputs while the DMC-3415
has 7 uncommitted TTL level inputs. The command @IN, TI and TZ will read the state of the inputs.
For more information on these commands refer to the Command Reference.
The reset input is also a TTL level, non-isolated signal and is used to locally reset the DMC-3425
without resetting the PC.
Analog Inputs
The DMC-3425 has 2 analog inputs configured for the range between –10V and +10V. The inputs are
decoded by a 12-bit ADC giving a voltage resolution of approximately .005V. The impedance of these
inputs is 10Kohms. The analog inputs may be read using the @AN[n] function, where n is the number
of the analog input to be read.