3:9
Logic Input Signals
Eight optically isolated inputs are
available through the 2CN
connector. Each input requires 4
mA in the ON state when a 12
VDC supply is used. A typical
input is shown in Figure 3-6. The
common (0VI) for all inputs are
pins 26 through 32. A brief
description of the seven functions
follows; the pin numbers are
shown in parenthesis.
RUN(11): This input (RUN) starts
the controller when closed.
Maintained-Start/Stop operator
devices must be used for this
function.
RESET(12): This input (RST)
resets the controller after a fault
has occurred. A momentary
operator device must be used for
this function.
PROPORTIONAL SPEED
LOOP(13): This function (P)
selects a proportional only speed
loop regulator. Note 1SW–6 has
no effect when this function is
enabled.
SHAFT CLAMP(14): This signal
(SLK) clamps the shaft when the
controller operates in Position
mode.
SEAL IN INPUT (15): This input
(RSI) provides electronic input for
momentary run input. It is similiar
to a seal in contact but is not a
physical contact. See the
Start/Stop circuits shown in Figure
3-12.
INHIBIT (+) REFERENCE(16):
This input (FHC) prevents the
controller from responding to a
positive speed/torque reference.
WARNING
THIS DRIVE IS CAPABLE
OF OPERATING AT AND
MAINTAINING ZERO
SPEED. THE USER IS RE-
SPONSIBLE FOR ASSUR-
ING SAFE CONDITIONS
FOR OPERATING PERSON-
NEL BY PROVIDING SUIT-
ABLE GUARDS AND AU-
DIBLE OR VISUAL ALARMS
OR OTHER DEVICES TO
INDICATE THAT THE DRIVE
IS OPERATING OR MAY BE
OPERATING AT OR NEAR
ZERO SPEED. FAILURE TO
OBSERVE THESE PRE-
CAUTIONS COULD RE-
SULT IN BODILY INJURY.
INHIBIT (–) REFERENCE(17):
This input (RHC) prevents the
controller from responding to a
negative speed/torque reference.
INHIBIT REFERENCE(18): This
input (ZHC) and SHAFT CLAMP
(14) prevent the controller from
responding to both positive and
negative speed/torque references
when the parameter dip switches
are selected for speed or torque
regulation.
Figure 3-6. Typical Optically Isolated Input.
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