Rice Lake 920i Single Channel A/D Card - Manual

December 2010 69092
920i ® Programmable HMI Indicator/Controller
Single-Channel A/D Card Installation Instructions
PN 68532
Use the following procedure to install single-channel
A/D cards in
920i
indicators:
1. Disconnect indicator from power source.
W arning
Disconnect power before removing
indicator backplate.
2. Place indicator face-down on an antistatic
work mat. Remove screws that hold the
backplate to the enclosure body.
Use a wrist strap to ground yourself and
protect components from electrostatic
discharge (ESD) when working inside the
indicator enclosure.
3. Carefully align the large option card
connector with connector J5 or J6 on the CPU
board. Press down to seat the option card in
the CPU board connector.
4. Use the screws and lockwashers provided in
the option kit to secure the other end of the
option card to the threaded standoffs on the
CPU board (see Figure 1).
J5
J6
Figure 1. Installing Option Card Onto CPU Board
5. To attach cables from load cells or junction
boxes to the A/D card, route the cables
through the cord grips and wrap the shield
w i r e s a r o u n d t h e g r o u n d s tu d o n t h e
enclosure. Secure shield wires to the ground
stud with the kep nut included in the parts kit.
See the
920i
Installation Manual, PN 67887,
for more information about grounding cables.
6. Next, remove connector J1 from the A/D
card. The connector plugs into a header on the
card (see Figure 2). Wire the load cell cable
from the load cell or junction box to
connector J1 as shown in Table 1.
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.


4*(


4*(o



4&/


4&/o


&9$


&9$o

+
+1 +1
Figure 2. Single-Channel A/D Card
Table 1. A/D Card Pin Assignments
J1
Connector Pin Function
1 +SIG
2 –SIG
3 +SENSE
4 –SENSE
5 +EXC
6 –EXC
For 6-wire load cell connections, remove jumpers JP1 and
JP2.
To be the best by every measure