Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 76)

Field Wiring Arm Connections
Chapter 6
6Ć24
Connect the (NC) and (NO) contacts of each INCH button to opposite
chassis exactly as shown in Figure 6.11. This allows both voting
processors to monitor and cross check both INCH buttons for correct
operation. You may locate the INCH buttons at an operator control panel.
However, they are not part of any plug-in operator station. Wire them
directly as shown in Figure 6.11.
Plug-in operator stations 1 thru 4 and dummy plugs that you may use to
bypass these stations are shown in Figure 6.11 and Figure 6.12. You may
alter this configuration according to the number of bypassable stations
that you need for your press system.
If all run stations are bypassed, you may still operate in inch or micro-inch
mode using INCH buttons.
For example, if you have only one operator station, you may wire station
1 as shown in Figure 6.11, using direct wiring instead of operator station
plug connections. However, you must also bypass station 2, using direct
wiring instead of dummy plug connections. In other words, to bypass
station 2, you may simply connect terminals 3 and 4 of each field wiring
arm to 2L1.
For another example, if you have three operator stations, and only station
2 will be in constant use, build and wire plug-in stations 1 and 3 as shown
in Figure 6.11 and Figure 6.12. Directly wire station 2 according to
Figure 6.11. Directly wire station 4 bypass according to Figure 6.12. You
must also build and wire the dummy plugs for stations 1 and 3.
Important: Configure or do not configure stations 3 and 4 through
backplane switch settings as described in chapter 3 and PLC configuration
bits as described in chapter 4. If you configure plug-in station 3 and/or
station 4, but do not use either or both, you must bypass the unused
station(s) with a dummy plug(s). If you have not configured for stations 3
and 4, you need not place a 1771-IA module in module group 1, slot 0,
chassis A and B.
Connect the (NC) and (NO) contacts of each RUN button to opposite
chassis exactly as shown in Figure 6.11 and Figure 6.12 for all stations.
This allows both voting processors to monitor and cross check all RUN
buttons for correct operation.
Inch Buttons and PlugĆIn
Operator Stations