
Manual – 3000 NRL Family
Unidata Manual - 3000 NRL Family - 06 08 2019.docx
Page 28
Terminal
Connection
Description
SAT MODEM
Globalstar Satellite Connection
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 -
INSTRUMENT
Smart Instrument Connection RS232 (Male) Serial Port
MODBUS
GND 1
Ground MODBUS Channel 1
1A-
MODBUS Channel 1 A-
1B+
MODBUS Channel 1 B+
GND 0
Ground MODBUS Channel 0
0A-
MODBUS Channel 0 A-
0B+
MODBUS Channel 0 B+
SDI-12
GND (0 & 1)
Ground SDI-12 Channel 0 and 1
SDI-1
SDI-12 Signal Channel 1
12V (0 & 1)
SDI-12 12V Channel 0 and 1
SDI-0
SDI-12 Signal Channel 0
RELAYS
NO0
Normally open 0 1A 30Vdc, 0.5A 125VAC
COM0
Common 0
NC0
Normally closed 0 1A 30Vdc, 0.5A 125VAC
NO1
Normally open 1 1A 30Vdc, 0.5A 125VAC
COM1
Common 1
NC1
Normally closed 1 1A 30Vdc, 0.5A 125VAC
INST PWR
12V
12V regulated 200mA fused
GND
Ground
5V
5V regulated 100mA fused
GND
Ground
5V
5V regulated 100mA fused
GND
Ground
COUNTERS
GND
Ground
C3
16 bit, DC to 32Hz potential free contacts or 0 to 5VDC
C2
16 bit, DC to 32Hz potential free contacts or 0 to 5VDC
GND
Ground
C1
16 bit, DC to 32Hz potential free contacts or 0 to 5VDC
C0
16 bit, DC to 320Hz potential free contacts or 0 to 5VDC
OUT
GND
Ground
OUT0
Digital Output0 Open Drain FET 30V DC, 250mA max
ANALOG INPUTS
A7
A7 +ve single (D3 -ve differential)
AGND
Analog Ground
A6
A6 +ve single (D3 +ve differential)
A5
A5 +ve single (D2 -ve differential)
AGND
Analog Ground
A4
A4 +ve single (D2 +ve differential)
ANALOG INPUTS
A3
A3 +ve single (D1 -ve differential)
AGND
Analog Ground
A2
A2 +ve single (D1 +ve differential)
A1
A1 +ve single (D0 -ve differential)
AGND
Analog Ground
A0
A0 +ve single (D0 +ve differential)