Rice Lake 520 HMI Digital Weight Indicator Installation Manual - Manual (Page 12)

Installation 6
2.0 Installation
This section describes procedures for connecting load
cells, digital I/O, and serial communications cables to
the 520 indicator. Instructions for field installation of
the analog output option and replacement of the CPU
board are included, along with assembly drawings and
parts lists for the service technician.
CAUTION
• Use a wrist strap to ground yourself and protect
components from electrostatic discharge (ESD) when
working inside the indicator enclosure.
• This unit uses double pole/neutral fusing which could
create an electric shock hazard. Procedures requiring
work inside the indicator must be performed by qualified
service personnel only.
• The supply cord serves as the power disconnect for the
520 . The power outlet supplying the indicator must be
installed near the unit and be easily accessible.
2.1 Unpacking and Assembly
Immediately after unpacking, visually inspect the 520
to ensure all components are included and undamaged.
The shipping carton should contain the indicator, this
manual, and a parts kit. If any parts were damaged in
shipment, notify Rice Lake Weighing Systems and the
shipper immediately.
2.1.1 Stainless Steel Panel Mount Model Parts
Kit
The following items are found in the stainless steel
panel mount model parts kit:
• Capacity label (PN 94422).
• Four 8-32NC x 1/4 machine screws (PN
71522).
• Seven 10-32NFx machine screws (PN 82425).
• One 8-32NC hex kep nut (PN 14626).
• One welded clinching bracket (PN 69787).
• One 7-position screw terminal (PN 71343)
• Two 10-position screw terminals (PN 71344).
• One 1/4-28NF slotted, drilled fillister head (PN
42640).
• One three-position terminal block (PN 15888).
• One stainless steel backing plate (PN 82426).
2.1.2 Desktop Model Parts Kit
The following items are found in the desktop model
parts kit:
• Two 8-32NC hex kep nut (PN 14626)
• Two No. 8, Type A lock washers (PN 15134)
• Two 1/4 x 1/2 x 1/32 nylon washers 
(PN 32394)
• Two 1/4 - 20, 2-prong black knobs 
(PN 68403)
• Capacity label (PN 42350)
• One 7-position screw terminal (PN 71343)
• Two 10-position screw terminals (PN 71344).
2.2 Panel Mount Installation
Use the dimensions shown in Figure 2-1 on page 7 to
lay out the panel cutout for the stainless steel panel
mount enclosure. Use the dimensions shown in
Figure 2-2 on page 7 to lay out the panel cutout for the
desktop model enclosure. See Figure 2-3 on page 8 and
Figure 2-4 on page 8 for enclosure dimensions.
Stainless Steel Panel Mount Installation
Once the cutout has been prepared, slide the enclosure
into the cutout from the front of the panel. Slide the
clinching bracket around the enclosure from inside the
panel. Secure the bracket to the enclosure using the
four 3/16" screws provided in the parts kit (PN 45386),
then use the five 5/8" screws (PN 71523) to secure the
clinching bracket to the panel door.
Desktop Panel Mount Installation
Once the cutout has been prepared, slide the enclosure
into the cutout from the front of the panel. Secure the
clinching brackets to the enclosure, then use the four
screws from the parts kit (PN 78425) to secure the
clinching brackets to the panel door.