Campbell NR01, Instruction Manual

Page: 39 / 42

B-1
Appendix B. Cable Details
TABLE B-1 provides the polarity and PCB04 connection for Cable 1 (solar),
and TABLE B-2 provides the polarity and PCB04 connection for Cable 2
(PT100). TABLE B-3 shows the internal connections to the terminal blocks,
which should only be required for servicing such as cable replacement.
TABLE B-1. Cable 1 (Solar) Polarity and PCB04 Connection
Color Wire Label Polarity*
PCB04
Connection
Red Pyranometer Up Sig + 2
Blue Pyranometer Up Ref – 1
White Pyranometer Down Sig + 8
Green Pyranometer Down Ref – 7
Brown Pyrgeometer Up Sig + 4
Yellow Pyrgeometer Up Ref – 3
Purple Pyrgeometer Down Sig + 6
Grey Pyrgeometer Down Ref – 5
Clear Shield Ground 11, 12
*The + connections of radiometers give + signal when radiation comes in.
TABLE B-2. Cable 2 (Temperature/Heater) Polarity
and PCB04 Connection
Color Wire Label Polarity
PCB05
Connection
Red* Current Excite + 2
Blue Current Return – 4
White* PT100 Signal + 3
Green PT100 Signal Ref – 5
Brown** Heater Power SW12V + 1
Yellow** Heater Ground – 6
Purple Ground GND 7
Grey Shield GND 8
Clear Shield Ground 9, 10
*The red and white end is at same side of the sensor (both +).
**The heater polarity are not critical.