Manual – 3000 NRL Family
Unidata Manual - 3000 NRL Family - 06 08 2019.docx
Page 30
Terminal
Connection Description
POWER 9-30VDC
AUX+
External 9V to 30VDC Power
AUX-
External 9V to 30VDC Power Supply -
POWER 9-30VDC
MAIN+
External 9V to 30VDC Power
MAIN-
External 9V to 30VDC Power Supply -
MODBUS
GND
Ground MODBUS
A-
MODBUS A-
B+
MODBUS B+
SDI-12
GND
Ground SDI-12
SDI-1
SDI-12 Signal
RELAY
NO0
Normally open 0 1A 30Vdc, 0.5A 125VAC
COM0
Common 0
NC0
Normally closed 0 1A 30Vdc, 0.5A 125VAC
INSTRUMENT POWER
5V
5V regulated 100mA fused
GND
Ground
COUNTERS / ANALOG INPUTS
GND
Ground
C3/A4
16 bit, DC to 32Hz potential free contacts or
0 to 5VDC
O O ti
l A l A4
C2/A5
16 bit, DC to 32Hz potential free contacts or
0 to 5VDC
O O i
l A l A5
GND
Ground
C1/A6
16 bit, DC to 32Hz potential free contacts or
0 to 5VDC
O O
6
C0/A7
16 bit, DC to 320Hz potential free contacts or
0 to 5VDC
O O i
l A l A7
OUT
GND
Ground
OUT0
Digital Output0 Open Drain FET 30V DC, 250mA max
ANALOG INPUTS
AGND
Analog Ground
A3
A3 +ve single
A2
A2 +ve single
AGND
Analog Ground
AGND
Analog Ground
A1
A1 +ve single
A0
A0 +ve single
AGND
Analog Ground