Load Cells - Rice Lake 520 Installation Manual

2.3.1

Load Cells

To attach cable from a load cell or junction box, route
the cable to the external J6 connector.
Wire the load cell cable from the load cell or junction
box to connector J6 as shown in Table 2-1. If using
6-wire load cell cable (with sense wires), remove
jumpers JP1 and JP2 before reinstalling connector J6.
For 4-wire installation, leave jumpers JP1 and JP2 on.
When connections are complete, reinstall connector
J6 on the board.
GND1
F2
6 8 9 10
7
T1
11
15 14 13 12
RICE LAKE WEIGHING SYSTEMS
F1
J4
Figure 2-1. 520 CPU and Power Supply Board, Version 2.1
Connector
J6
For 6-wire load cell connections, remove
jumpers JP1 and JP2.
Table 2-1. J6 Pin Assignments
J1
J2
U19
U19 U19
U19
50 26
51 25
U22
75 1
76 100
ISP
GND2
J8
J5 J6
Pin Function
1 +SIG
2 –SIG
3 +SENSE
4 –SENSE
5 +EXC
6 -EXC
7 SHIELD
ANALOG
TEST
GND1
+5V
TEST
–5V
TEST
+3.3V
JP2
JP1
J7
SETUP
Installation 7