ElmoMC SimplIQ Analog Servo Amplifiers-Cymbal - Manual (Page 33)

Cymbal Installation Guide
MAN-CYMIG (Ver. 1.3)
33
Chapter 4: Servo Control Operation
4.1. Cymbal Connected to DC Motors
In order to connect the Cymbal to a DC motor, connect Hall A (J4 pin 5 of the drive to Hall
return (J4 pin 3 of the drive). The motor should be connected to M2, M3.
4.2. Current Command Input
The Cymbal has a single differential input. The input operating voltage range is ±10 V, meaning
that a 10 V signal will result in a fully rated peak current. The current limit circuits will override
this signal if the peak duration exceeds 2.7 seconds and/or the required current exceeds the
values set by the ECLC and ECLP signals. If the input command voltage exceeds 10 V, input
scaling must be implemented by adding a pair of external resistors, according to the following
formula:
Rin (KΩ) = (5.33 * Vin) – 53.6
Be careful not to apply input voltage above the maximum allowed input voltage as this will
cause the input operational amplifier to operate beyond its limits (±20 V) and in extreme cases,
may even damage it.
4.3. External Current Limit - Continuous (ECLC)
The continuous current limit of the Cymbal amplifiers can be scaled down by an external
voltage or by an external resistor connected from pin J2/13 (ECLC) to pin J2/8 (ECLRET).
4.3.1. External Voltage
V
ECLC
IC(new) =
3.75V
* Ic(nom)
V
ECLC
IC(new) =
3.75V
* Ic(nom)
An external positive voltage (0 to 3.75 V) to terminal J2/13 (ECLC) in reference to terminal J2/8
(ECLRET) will control the continuous current limit from zero to Ic (nom).
The voltage is internally clamped to 3.75 V whenever the external VECLC is greater than 3.75 V.
The external voltage source must be able to source/ sink at least ±0.2 mA.
The maximum absolute VECLC allowed to be connected is 5 V.
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