ElmoMC SimplIQ Analog Servo Amplifiers-Violin Operating Manual - Manual (Page 19)

VIO-Velocity - Operating Manual Rev 09/09. Elmo Motion Control
Page 15
3.5.1 ECLP external voltage
An external positive voltage (0 to 3.75V) to terminal ECLP in reference to terminal ECLRET will control
peak current limit from zero to Ip (nom).
) ( *
75 . 3
) ( nom I
V
V
new I
P
ECLP
P
=
Remarks:
The voltage will be internally clamped to 3.75V whenever the external V
ECLP
will be higher
than 3.75V.
The external voltage source must be capable to source/ sink at least ±0.2 ma.
The max absolute V
ECLP
is 12V.
3.5.2 Peak current limit resistor
The user can change the continuous current limit by calculating and inserting R10. The value is given by:
1
) (
) (
* 4 . 37 ) ( 10 − =
nom Ip
new Ip
Kohm R
Remarks:
• 0 < R10 < 36.4K (1/8 Watt)
• If R10 is larger than 36.4K the current limit will be internally clamped to the nominal
value.
• I
P (nom)
is the nominal peak current limit of the amplifier.
3.6
Latch Mode
By setting S4 to the ON position, whenever one of the following failures: Short, and Over Temperature
occur the amplifier will be latched in Disable mode.
Disabling the amplifier (removing the power from the Enable pins J4/13 and J4/14) resets the latch. If the
amplifier is enabled by S6, switch S6 off then back on.
3.7
Enable
Pins J4/13 and J4/14 are the inputs of an opto-coupler. The opto-coupler must be energized to enable the
operation of the amplifier. If the Enable input is kept High before powering the amplifier, the amplifier
power output will be active immediately upon power on.
To enable the operation of the amplifier the opto must be “on”. This can be done in two ways:
1. Apply voltage between this J4 pin 13(+) and J4 pin 14 (-).
Minimum “ON” voltage: 5V, current consumption 1.2 ma.
Maximum “ON” voltage: 15V, current consumption 5 ma.
When operating in this mode Dipswitch 6 must be in the OFF position.
2. Set Dip switch 6 to the ON position and connect "EN-" (pin 14) to ECLRET (pin 7).