Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 55)

Field Wiring Arm Connections
Chapter 6
6Ć3
Connect your clutch/brake controller to either an ungrounded AC power
configuration (Figure 6.1) or a grounded AC power configuration
(Figure 6.5). Either figure shows two separately fused 120V AC power
circuits. Power lines 3L1 and 3L2 provide power to the field wiring arms
at module group 3, slot 0 and module group 4, slot 0 in chassis A and B.
Power lines 2L1 and 2L2 provide power to all other field wiring arms, the
PLC power supply, and chassis A and B power supplies.
Either AC power configuration lets your PLC, clutch/brake controller, and
inputs remain on after solenoid power has been disconnected as shown in
Figure 6.1 or Figure 6.5. Disconnecting solenoid power stops press
operation. Solenoid power is disconnected if an E-Stop switch opens, a
seal relay trips, or a crowbar relay turns on. When solenoid power is
disconnected, both voting processors continue to run and generate
diagnostic message codes. Status indicators of input modules continue to
show which switches are on or off. Therefore, either AC power
configuration lets you more easily troubleshoot most problems that cause
your press to shut down.
Important: Be sure that your clutch/brake controller is properly
grounded to provide greater safety and reduced electrical noise
interference. For details, refer to PLC Grounding (publication 1770-4.1).
The E-Stop circuit allows an operator or a voting processor to quickly
stop the press. Connect all E-Stop switches and contacts in series with
seal A and B contacts, as shown in Figure 6.1 or Figure 6.5.
WARNING: To guard against possible injury to personnel
and damage to your press, connect seal relays, crowbar
relays, and operator station E-Stop switches exactly as
shown in Figure 6.1 and Figure 6.3 or Figure 6.5 and
Figure 6.7.
You may connect any number of additional E-Stop switches and contacts
in series with the mandatory operator station E-Stop switches. These can
include, but are not limited to, remote E-Stop switches, air pressure switch
contacts, and relay contacts for monitoring the power supply.
Control Power
EĆStop Switches, Seal Relays,
and Crowbar Relays