Rockwell Automation 1336 3-20HP FRN 1.01-3.01 - Manual (Page 108)

Logic Interface Options
Appendix A
A-7
1336ĆMODĆL2 +24V DC
The +24V DC Logic Interface Board provides a means of interfacing
Logic Interface Board
various signals and commands to the 1336 drive using +24V DC signals. A
+24V DC power source must be supplied by the user for the board to
operate. Plug in connectors on the +24V DC Interface Board allow it to be
plugged directly into connectors on the Main Control Board. Two
mounting thumb screws secure the board in place.
!
ATTENTION: If the +24V DC Interface Board is to replace
either the 1336-MOD-L1 or 1336-MOD-L3, external circuits must
be reconfigured to operate at the +24V DC logic potentials required
by the board. The application of either +5V DC or 115V AC to the
+24V DC Interface Board will damage both the +24V DC Interface
Board and the Main Control Board.
Operation
Each of the twelve terminals on the board are defined as being either a user
command input signal or interface common.
When a closed circuit is present between a terminal and interface common,
a +20 to +26V DC potential will exist. This represents the selected state or
high = True.
When an open circuit is present between a terminal and interface common,
the input will go lower to a False state.
Requirements
Circuits used with the +24V DC Logic Interface Board must meet the
following criteria:
•
Circuits must be capable of operating with high = True logic.
•
In the low state, circuits must generate a voltage of no more than 3.0V
DC. The leakage current must be less than 1mA into a 2.8k
Ω
load.
•
In the high state, circuits must generate a voltage of +20 to +26V DC
and source a current of approximately 8.5mA for each input.