Manual – 3000 NRL Family
Unidata Manual - 3000 NRL Family - 06 08 2019.docx
Page 37
5.5.9 Option 9 SQL Counter Input
5.5.10 Configuring Input Signal Jumpers
These will normally be factory set upon ordering, but may be changed by the user to accommodate a different input
sensor type. Correct static electricity handling precautions should be observed when handling the circuit board
assembly to alter the jumpers
Option
Probe Type
JP1
JP2
JP3
JP4
JP5
1
SDI-12 Insitu
As needed Open Right Open
Open 15V, Closed 18V Power
2
Modbus Insitu
As needed Open Right Open
Open 15V, Closed 18V Power
3
4-20mA Insitu
Open
Right Left Closed Open 15V, Closed 18V Loop Power
4
SQL Modbus
As needed Open Right Open
Open 15V, Closed 18V Power
5
SQL SDI-12
As needed Open Right Open
Open 15V, Closed 18V Power
6
SQL Voltage
As needed Left Right Open
Open 15V, Closed 18V Power
7
SQL 3 wire 4-20mA As needed Left Right Closed Open 15V, Closed 18V Sensor Power
8
SQL 2 wire 4-20mA Closed
Left Right Closed
Closed 18V Loop Power
9
SQL Counter Input As needed Open Right Open
Open 15V, Closed 18V Power
JP1 Open for self-powered sensor, Closed if NRL will power the sensor via scheme switched power
JP2 Left Set P4 function to A0 in, Right Set P4 function to Loop Power out
JP3 Left Set P6 function to A0 in, Right Set P6 function to GND
JP4 Close for 120R loop resistor in circuit on A0
JP5 Open 15V, Closed 18V Instrument Power Output
JP Config
Connection
Description
Cable Colour
JP1 – CLOSED
(if needed, to supply power to
sensor)
JP2 – OPEN
JP3 RIGHT
(linking pins 1&2 to ground
black wire)
JP4 - OPEN
6
Counter Input
Purple
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
5
Sensor Power
(optional)
Red
7
Ground
Black
