Elmo ExtrIQ Dragonfly/Butterfly Benutzerhandbuch

The Dragonfly and Butterfly have a single differential input. The input operating voltage 
range is 

± 3.75 V, meaning that a 3.75 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 3.75 V, input scaling must be implemented by adding a pair of 
external resistors, according to the following formula: 

Rin (kΩ) = (5.33 * Vin) - 20 

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. 

The continuous current limit of the Dragonfly and Butterfly amplifiers can be scaled down by 
an external voltage or by an external resistor connected from pin J1/9 (ECLC) to pin J1/8 
(ECLRET). 

An external positive voltage (0 to 3.75 V) to terminal J1/9 (ECLC) in reference to terminal J1/8 
(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 
3.75V. 

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.

V

ECLC

IC(new) = 

3.75V

* Ic(nom)

V

ECLC

IC(new) = 

3.75V

* Ic(nom)

Dragonfly/Butterfly Installation Guide 

 

MAN-DRBUIG (Ver. 1.1) 

 

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