Galil DMC-1800 user manual TTL Inputs, TTL Outputs, DMC-1700/1800, ICM-1900/2900, 1X80

the ICM-1900interface board. To change the polarity from active high (5 volts= enable, zero volts = disable) to active low (zero volts = enable, 5 volts= disable), replace the 7407 IC with a 7406. Note that many amplifiers designate the enable input as ‘inhibit’.

To change the voltage level of the AEN signal, note the state of the resistor pack on the ICM-1900. 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.

DMC-1700/1800

100-PIN HIGH DENSITY CABLE

ICM-1900/2900
+12V	+5V

Connection to +5V or +12V made through Resistor pack RP1. Removing the resistor pack allows the user to connect their own resistor to the desired voltage level (Up to24V). Accessed by removing Interconnect cover.

AMPENX	SERVO MOTOR
	AMPLIFIER
GND

MOCMDX

7407 Open Collector Buffer. The Enable signal can be inverted by using a 7406. Accessed by removing Interconnect cover.

Analog Switch

Figure 3-3 - Connecting AEN to the motor amplifier

TTL Inputs

1X80

As previously mentioned, the DMC-1700/1800 has 8 uncommitted TTL level inputs for controllers with 5 or more axes. These are specified as INx where x ranges from 17 thru 24 and are interrogated using the operand @IN[x]. The reset input is also a TTL level, non-isolated signal and is used to locally reset the DMC-1700/1800 without resetting the PC.

TTL Outputs

The DMC-1700/1800 provides eight general use outputs, an output compare and an error signal output.

The general use outputs are TTL and are accessible through the ICM-1900 as OUT1 thru OUT8. These outputs can be turned On and Off with the commands, SB (Set Bit), CB (Clear Bit), OB (Output Bit), and OP (Output Port). For

48 • Chapter 3 Connecting Hardware DMC-1700/1800