ElmoMC SimplIQ Analog Servo Amplifiers-Piccolo Installation - Manual (Page 25)

Piccolo Installation Guide Servo Control Operation
MAN-PICIG (Ver. 2.301)
www.elmomc.com
25
4.4. External Current Limit - Continuous (ECLC)
The continuous current limit of the Piccolo amplifier can be scaled down by an external voltage
or by an external resistor connected from pin J1/3 (ECLC) to pin J1/5 (ECLRET).
4.4.1. External Voltage
An external positive voltage (0 to 3.75 V) to terminal J1/3 (ECLC) in reference to terminal J1/5
(ECLRET) will control the continuous current limit from zero to Ic(nom).
V
ECLC
IC(new) =
3.75V
* Ic(nom)
V
ECLC
IC(new) =
3.75V
* Ic(nom)
• The voltage is internally clamped to 3.75 V whenever the external V
ECLC
is greater than 3.75
V.
• The external voltage source must be able to source/ sink at least ±0.2 mA.
• The maximum absolute V
ECLC
is 12 V.
4.4.2. External Resistor
Connect an external resistor between terminal J1/4 (ECLC) and terminal J1/5 (ECLRET). The
resistor value is given by:
(Kohm) = 37.4 * R
ECLC
Ic(new)
Ic(nom)
- 1 (Kohm) = 37.4 * R
ECLC
(Kohm) = 37.4 * R
ECLC
Ic(new)
Ic(nom)
- 1
• 0 < R
ECLC
< 36.4 K (1/8 Watt)
• At R
ECLC
greater than 36.4 K, the current limit will be internally clamped to the nominal
value.
• I
C(nom)
is the nominal continuous current limit of the amplifier.
4.5. External Current Limit - Peak (ECLP)
The peak current limit of the Piccolo amplifier can be scaled down by an external voltage or by
an external resistor connected between pin J1/4 (ECLP) and pin J1/5 (ECLRET).
4.5.1. External Voltage
An external positive voltage (0 to 3.75 V) to terminal J1/4 (ECLP) in reference to terminal J1/5
(ECLRET) will control the peak current limit from zero to Ip(nom).
V
ECLP
Ip(new) =
3.75V
* Ip(nom)
V
ECLP
Ip(new) =
3.75V
* Ip(nom)
• The voltage is internally clamped to 3.75 V whenever the external V
ECLP
is higher than
3.75 V.
• The external voltage source must be able to source/sink at least ±0.2 mA.
• The maximum absolute V
ECLP
is 12 V.