Rockwell Automation 1336 3-20HP FRN 1.01-3.01 - Manual (Page 105)

Logic Interface Options
Appendix A
A-4
1336ĆMODĆL1 Terminal 19 and Interface Common
+5V DC TTL Logic Contact
Closure Interface Board (cont.) Start
Momentary True = Start
False = Continue Last State
This input will command the drive to start if all hardwired interlocks are
closed. The drive will continue to run until a stop command is received, an
interlock is opened, or a fault is detected. A maintained True state is not
required to keep the drive running but is permitted. A False state is
required to allow the drive to respond to a momentary stop input.
Terminal 20 and Interface Common
(This signal must be maintained as True to permit the drive
to operate from any control source.)
Stop
Maintained True = Not stop
Momentary False = Stop
Stop must be a maintained True input to permit the drive to start and run. A
momentary False input of 20mS or more or any other drive stop command
will initiate a drive stop sequence as programmed by Parameter 10, Stop
Select.
Terminals 21, 25, 29
Interface Common
Terminals 21, 25 and 29 are specifically used to terminate both minus or
interface common signals to TB3. For the 1336-MOD-L1 Interface Board,
Terminals 21, 25 and 29 are also internally connected to drive signal
common, chassis ground, and earth ground.