3 load cells, Load cells, Figure 2-2). f – Rice Lake 920i USB Installation Manual V5.05 User Manual

Page 16

920i Installation Manual

•

For cables with braided shielding, strip cable
insulation and braided shield from a point just
past the grounding clamp. Strip another half inch
(15 mm) of insulation only to expose the braid
where the cable passes through the clamp (see
Figure 2-2).

Cord Grip

Insulated
cable

Foil

(silver side out)

Grounding clamp

Shield wire

(cut)

Length of foil before folding
back on cable insulation

Cut insulation here

for foil-shielded cables

Braid

Cut insulation here

for braided cables

NOTE: Install lockwashers

ﬁrst, against enclosure,

under grounding clamp

Figure 2-2. Grounding Clamp Attachment for Foil-Shielded

and Braided Cabling

•

For load cell cables, cut the shield wire just past
the grounding clamp. Shield wire function is
provided by contact between the cable shield and
the grounding clamp.

•

Route stripped cables through cord grips and
clamps. Ensure shields contact grounding clamps
as shown in Figure 2-2. Tighten grounding clamp
nuts.

•

Finish installation using cable ties to secure
cables inside of indicator enclosure.

2.3.3

Load Cells

To attach cable from a load cell or junction box to an
installed A/D card, route the cable through the cord
grip and ground the shield wire as described in
Section 2.3.2 on page 9.

Next, remove connector J1 from the A/D card. The
connector plugs into a header on the A/D card (see
Figure 2-3). Wire the load cell cable from the load cell
or junction box to connector J1 as shown in Table 2-1.

SIG+

SIG–

SEN+

SEN–

EXC+

EXC–

JP2

JP1

Figure 2-3. Single-Channel A/D Card

If using 6-wire load cell cable (with sense wires),
remove jumpers JP1 and JP2 before reinstalling
connector J1. For 4-wire installation, leave jumpers
JP1 and JP2 on. For 6-wire load cell connections on
dual-channel A/D cards, remove jumpers JP3 and JP4
for connections to J2.

When connections are complete, reinstall load cell
connector on the A/D card and use two cable ties to
secure the load cell cable to the inside of the enclosure.

Table 2-1. A/D Card Pin Assignments

A/D Card

Connector Pin

Function

+SIG

–SIG

+SENSE

–SENSE

+EXC

–EXC

•

For 6-wire load cell connections to connector J1, remove
jumpers JP1 and JP2.

•

For 6-wire load cell connections to connector J2 (dual A/D
cards), remove jumpers JP3 and JP4.