Watlow PM LEGACY
™
 Limit Controller  •  13  •  Chapter 2 Install and Wire 
  
2
Chapter 2: Install & Wiring
INSTALLTION
1.  For a PM3 Controller, make the panel cutout 
using the measurements shown on page 6.  
2. For a PM6 Controller, make the panel cutout 
using the measurements shown on page 7. 
3. Remove the green terminal connectors and 
the mounting collar assembly. 
4. Insert the controller into the panel cutout from 
the front. See Figure 2. The controller shown 
is a PM6 Controller. 
5. Orient the collar base so the flat side faces 
front and the screw openings are on the sides  
(see Figure 2), then slide the base over the 
back of the controller.
6. Slide the mounting bracket over the controller 
with the screws aligned to the collar base. 
See Figure 2. Push the bracket gently but 
firmly until the hooks snap into the slots in 
the case.
7. Tighten the two #6-19 x 1.5 in. screws with a 
phillips screwdriver until the device is flush to 
the panel (3 to 4 in-lbs torque). See Figure 3.
8. Reinstall the terminal connectors to their 
original locations. 
PM6 Controller
Mounting Screw
Mounting Panel
Figure 1: PM6 Installation
Figure 2: Slide Mounting Bracket 
over Controller
Figure 3: Tighten the Mounting 
Screws