Installation; Unpacking And Assembly; Enclosure Disassembly; Panel Mount Disassembly - Rice Lake 520 Installation Manual

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
t o e n s u r e a l l c o m p o n e n t s a r e i n c l u d e d a n d
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.
The parts kit contains the items listed below:
• Capacity label (.45 x 3.22 [PN 42350] ).
• Four 8-32NC x 3/16 machine screws (PN
45386).
• Five 10-32NF x 5/8 slotted hex head 18-8
stainless steel (PN 71523).
• 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 8-32 x 1/4 slotted, drilled fillister head SST
(PN 71217).
6 520 Installation Manual
2.2

Enclosure Disassembly

T h e i n d i c a t o r c o n n e c t i o n s f o r l o a d c e l l s ,
communications, digital inputs, and digital outputs are
externally mounted in the back of the indicator.
The 520 has no on/off switch. Before
Warning
opening the unit, ensure the power cord
is disconnected from the power outlet.
2.2.1

Panel Mount Disassembly

To remove the enclosure cover of the 520 panel mount
indicator, loosen and remove four Phillips head screws
on outside of indicator (see Figure 2-2 on page 11).
2.3

Cable Connections

The 520 panel mount has three external connectors, a
cord grip for the power cord, and a cord grip for
installed options.
Except for the power cord, all cables routed through
the cord grip should be grounded to the ground stud
on the indicator enclosure.