ElmoMC SimplIQ Analog Servo Amplifiers-Cymbal - Manual (Page 34)

Cymbal Installation Guide Servo Control Operation
MAN-CYMIG (Ver. 1.3)
34
4.3.2. External Resistor
Connect an external resistor between terminal J2/13 (ECLC) and terminal J2/8 (ECLRET).
The resistor value is given by:
(Kohm) = 37.4 *
Ic(new)
Ic(nom)
- 1 R
ECLC
(Kohm) = 37.4 * (Kohm) = 37.4 *
Ic(new)
Ic(nom)
- 1 R
ECLC
R
ECLC
0 < RECLC < 36.4 K (1/8 Watt)
At RECLC greater than 36.4 K, the current limit will be internally clamped to the nominal value.
Ic (nom) is the nominal continuous current limit of the amplifier.
4.3.3. External Current Limit ­ Peak (ECLP)
The peak current limit of the Cymbal amplifiers can be scaled down by an external voltage or by
an external resistor connected between pin J2/12 (ECLP) and J2/7 (ECLRET).
4.3.4. External Voltage
An external positive voltage (0 to 3.75 V) to terminal J2/12 (ECLP) in reference to terminal J2/7
(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 VECLP is higher than 3.75 V.
The external voltage source must be able to source/sink at least ±0.2 mA.
The maximum absolute VECLP allowed to be connected is 5 V.
(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
4.3.5. External Resistor
Connect an external resistor between terminal J2/12 (ECLP) and terminal J2/7(ECLRET).
The resistor value is given by:
0 < R
ECLP
< 36.4 K (1/8 Watt)
At RECLP greater than 36.4 K, the current limit will be internally clamped to the nominal value.
Ip(nom) is the nominal peak current limit of the amplifier.
4.3.6. Latch Mode (LM)
By connecting J2/5 to J2/10, the amplifier is latched to disable mode whenever a Short,
Commutation or Over Temperature failure occurs. Disabling the amplifier temporarily by
removing the power from Enable pin J2/14 resets the latch. Be sure to restore the Enable
connection when the reason for the event no longer exists.
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