Operating instructions

Keyed Lock Out Switch
Installation
Cl N O<dso n Co r poration 1993
M Rights Reserved
Installation 3-29
NOTE: This sw itch is not intended to be installed in the PC40. It can be
mounted on a remote panel,
etc .
The Nordson Keyed Lock Out Switch is an A-lock type, 4-tumbler
switch that prevents any input
via the PC40 user interface.
NOTE: When both the Keyed Lock Out Switch and Rotary Select
Switch
are installed, both must be connected as either sourcing devices
or as sinking devices. Figure 3.18 shows the wiring for the Keyed Lock
Out Switch as a sourcing device. Figure 3.19 shows the wiring for the
sw itch as a sinking device.
1.
Secure the sw itch to the mounting surface.
2.
If you have not already done so, temporarily mount the front
assembly to the back enclosure by doing the following:
a. Loosen the six screws on the front assembly.
b. Remove the two top screws (Figure 3.5).
c. Rotate the front assembly
1eo• (Figure 3.6).
d. Push the two screws through the top two front assembly holes
(Figure 3.7, view A).
e.
Insert the two screws into the two back enclosure stand-offs
(Figure 3.7, view A).
f. Tighten the two screws to secure the front assembly to the back
enclosure (Figure 3.7, vi
ew B) .
WARNING: Risk of electrocution. The AC input power line to
the
PC40 provides voltage that can cause pe rsonal injury or
death. Before making any electrical connections, disconnect
and lock out power to the main circuit breaker for the input
power
line (Figure 3.8) .
WARNING: Shock hazard. Touching bare wires in the PC40
can result in shock that can cause personal injury or death.
When making electrical connections, make sure
to strip only
as much insulation from the wires as needed. Also, make
sure that the insulation fits snugly against the
PC40 terminal
blocks.
PIN 1 08 389 A
57- 28 1 /93