4.3.5 External Resistor

Connect an external resistor between terminal J1/14 (ECLP) and terminal J1/8 (ECLRET).
The resistor value is given by:

0 < RECLP < 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 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.
4.4 Status Indications
The following table lists the Ocarina and Castanet 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 *
RECLP
Ip(new)
Ip(nom)
-1
(Kohm) = 37.4 *
RECLP (Kohm) = 37.4 *
RECLP
Ip(new)
Ip(nom)
-1
Ocarina/Castanet Installation Guide Servo Control Operation
MAN-OCSRIG (Ver. 1.2)
4-3