Rockwell Automation 1771-PM , D17716.5.18 U MNL 1771-PM CLUTCH/BRAKE MOD - Manual (Page 83)

Field Wiring Arm Connections
Chapter 6
6Ć31
When you configure the lamp test feature, you can check that all
indicators are working by pressing the LAMP TEST switch connected to
chassis C. The clutch/brake controller energizes the outputs to the
following indicators while the lamp test input is on:
Module Group 5, Slot 1, Chassis A and B for the diagnostic display
Module Group 3, Slot 1, Chassis A and B for BRAKE FAULT, RUN
WINDOW, and MICRO-INCH indicators.
Since hex (hexadecimal) numbers are easier than binary for people to
read, you may want to display hex message codes. You may provide a
device to convert the eight-digit binary outputs of chassis A and B,
module group 2, slot 1 to two-digit hex displays. Select output modules
that provide proper voltage to the device. For assistance, contact your
local Allen-Bradley sales engineer or distributor.
In chapter 7, we describe other methods of displaying hex message codes.
Chassis C provides for these functions:
reset latched messages
lamp test
customer interlock (redundant to Figure 6.1 or 6.5)
barrier guard (redundant to Figure 6.10)
stop-on-top (redundant to Figures 6.11 and 6.12)
This chassis is optional because you can:
omit redundant functions
use alternatives for the non-redundant functions
As alternatives, you can program the PLC to transfer the message reset bit
(bit 14) and/or the lamp test bit (bit 16) to the clutch/brake modules to
provide those functions. If already using A-B’s PanelView

, use that
operator interface to implement these functions.
If you use chassis C, follow these steps:
1. Wire PLC command switches as shown in Figure 6.15
2. Include command rungs, Figure 4.6, 4.7, or 4.8.
3. Set the backplane switches of chassis C to a valid rack address for
your PLC and clutch/brake system.
Lamp Test
Inputs to Chassis C