Dillon FI-521 User Manual
Page 35
FI-521 Indicator Operation & Service Manual
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35
If a pigtail (an around 30cm cable with a 7-pin female connector) is used for loadcell interface,the cable
pinouts are:
A: Signal -
B: Excitation +
C: Signal +
D: Excitation -
E: Sense -
F: Sense +
G: Ground
26.3.4 RS232 Connector:
PIN #
DEFINITION
IN/OUT/POWER ELECTRICAL LEVEL
1
COM1 Receive
Input
-12 to +12Vdc
2 COM1
Transmit
Output
-12
to
+12Vdc
3 GND
Power
ground
0Vdc
4 GND
Power
ground
0Vdc
5
COM2 Receive
Input
-12 to +12Vdc
6 COM2
Transmit
Output
-12
to
+12Vdc
26.3.5 RS485 Connector:
PIN #
DEFINITION
IN/OUT/POWER ELECTRICAL LEVEL
1
RS485 signal A
Input/output
0Vdc
2 RS485
signal
B
Input/output 0-5Vdc
3 GND
Power
ground
0-5Vdc
26.3.6 CAL Jumper set:
CONNECTED PINS
FUNCTION
1-2 Calibration
Enabled
2-3 Calibration
Disabled
26.3.7 JP4 Jumper set:
CONNECTED PINS
FUNCTION
1-2
RS485 terminal 120ohm resistor on board is disabled
2-3
RS485 terminal 120ohm resistor on board is enabled