External resistor, Latch mode (lm), Amplifier enable logic – ElmoMC SimplIQ Analog Servo Amplifiers-Violin Installation User Manual

Page 20: 6 latch mode (lm), 7 amplifier enable logic, 2 external resistor

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Violin Installation Guide

Servo Control Operation

MAN-VIOIG (Ver. 2.3)

4-4

4.5.2 External

Resistor

Connect an external resistor between terminal J1/4 (ECLP) and terminal J1/5 (ECLRET).
The resistor value is given by:

0 < R

ECLP

< 36.4 K (1/8 Watt)

At R

ECLP

greater than 36.4 K, the current limit will be internally clamped to the

nominal value.

I

P(nom)

is the nominal peak current limit of the amplifier.

4.6

Latch Mode (LM)

By connecting J2/2 to J2/1, the amplifier can be latched to Disable mode whenever a
Short or Over Temperature failure occurs. Disabling the amplifier temporarily (by
removing the power from Enable pins J2/3 and J2/4) resets the latch. Be sure to restore
the Enable connection when the reason for the event no longer exists. For permanent
selection, a simple short is recommended. For remote selection, use the following scheme.

Figure 4-2: LM Remote Control

4.7

Amplifier Enable Logic

Pins J2/3 and J2/4 are the inputs of an opto-coupler, which must be energized to enable
operation of the amplifier. If the Enable input is kept high before turning on the
amplifier, the amplifier power output will be active immediately upon power on.

(Kohm) = 37.4 *

R

ECLP

Ip(new)

Ip(nom)

- 1

(Kohm) = 37.4 *

R

ECLP

(Kohm) = 37.4 *

R

ECLP

Ip(new)

Ip(nom)

- 1

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