
For all versions of the ICM-42x00, the default configuration of the amplifier enable signal is 5V active high amp
enable (HAEN) sinking. In other words, the AEN signal will be high when the controller expects the amplifier to be
enabled. The polarity and the amplitude can be changed by configuring the Amplifier Enable Circuit on the ICM-
42xx0.
If your amplifier requires a different configuration than the default 5V HAEN sinking it is highly recommended
that the DMC-40x0 is ordered with the desired configuration.
See the DMC-40x0 ordering information in the
catalog (
http://www.galilmc.com/catalog/cat40x0.pdf
) or contact Galil for more information on ordering different
configurations.
Note:
Many amplifiers designate the enable input as ‘inhibit’.
ICM-42000 and ICM-42100 Amplifier Enable Circuit
This section describes how to configure the ICM-42000 and ICM-42100 for different Amplifier Enable
configurations. It is advised that the user order the DMC-40x0 with the proper Amplifier enable configuration.
The ICM-42000 and ICM-42100 gives the user a broad range of options with regards to the voltage levels present
on the enable signal. The user can choose between High-Amp-Enable (HAEN), Low-Amp-Enable (LAEN), 5V logic,
12V logic, external voltage supplies up to 24V, sinking, or sourcing. Tables 3.19 and 3.20 found below illustrate the
settings for jumpers, resistor packs, and the socketed optocoupler IC. Refer to Figures 3.8 and 3.9 for precise
physical locations of all components. Note that the resistor pack located at RP2 may be reversed to change the
active state of the amplifier enable output. However, the polarity of RP6 must not be changed; a different resistor
value may be needed to limit the current to 6 mA. The default value for RP6 is 820 Ω, which works at 5V. When
using 24 V, RP6 should be replaced with a 4.7 k resistor pack.
NOTE:
For detailed step-by-step instructions on changing the Amplifier Enable configuration on the ICM-42000 or
ICM-42100 see the Configuring the Amplifier Enable Circuit section in the Appendices.
Figure 3.8: Amplifier Enable Circuit Sinking Output Configuration
Chapter 3 Connecting Hardware ▫ 44
DMC-40x0 User Manual
Amplifier Enable Circuit
Sinking Output Configuration
(Pin 1 of LTV8441 in Pin 2 of Socket U4)
TTL level Amp
Enable signal
from controller
(SH = 5V, MO = 0V)
TTL level Amp
Enable signal
from controller
(SH = 5V, MO = 0V)
P
IN
1
RP2 (470 Ohm)
Pin 1
LT
V
84
41
Pin 1
of socket
Socket U4
RP6 (820 Ohm)
+5
V
G
N
D
A
E
C
2
+1
2
V
+5
V
G
N
D
A
E
C
2
+1
2
V
AECOM2
JP2
Amp Enable Output to Drive
(AENn)
AECOM2
+1
2
V
A
E
C
1
+5
V
G
N
D
JP2
AECOM1
JP1