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Elmo DRA- X/YY User Manual

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4.2.5 External 
Resistor 
Connect an external resistor between terminal J1/14 (ECLP) and terminal J1/8 (ECLRET).  
The resistor value is given by: 
0 < R
ECLP
  < 36.4 K (1/8 Watt) 
At RECLP greater than 36.4K, the current limit will be internally clamped to the nominal 
value. 
IP(nom) is the nominal peak current limit of the amplifier. 
4.2.6 
Latch Mode (LM) 
By connecting J1/7 to J1/15, 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 J1/1 resets the latch.    Be sure to restore the Enable 
connection when the reason for the event no longer exists.  
4.3 Status 
Indications 
The following table lists the Dragonfly and Butterfly amplifier status indications. 
 
 
Function 
Latch  
Option 
 
AOK 
 
SO1 
 
SO2 
 
SO3 
1 
Amplifier OK (AOK)  N/A 
Low 
Open 
collector 
Open collector  Open collector 
2 
External disable 
No 
Low 
Low 
Open collector  Low 
3 Current 
limit 
No 
Low 
Open 
collector 
Open collector  Low 
4 Short 
Yes 
Open 
collector 
Low Open 
collector 
Low 
5 Over 
temperature  Yes 
Open 
collector 
Open 
collector 
Low Low 
6 Internal 
supplies 
protection 
No Open 
collector 
Low Low  Open 
collector 
7 Under 
voltage 
No 
Open 
collector 
Low 
Open collector  Open collector 
8 Over 
voltage 
No 
Open 
collector 
Open 
collector 
Low Open 
collector 
9 Shunt* 
No 
Low 
Open 
collector 
Low Open 
collector 
(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
Dragonfly/Butterfly Installation Guide 
Servo Control Operation  
MAN-DRBUIG (Ver. 1.1) 
 
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