Precipitation Gage - Campbell KH20 Product Manual

A21REL-12 Terminal
+12V
Ground
CTRL 1
CTRL 2
CTRL 3
The +12V terminal on the A21REL-12 needs to be in common with the REL 1 COM, REL 2
COM, and REL 3 COM terminals. To do this, use jumper wires to connect the +12V
terminal to REL 1 COM, and then REL1 COM to REL 2 COM, and finally REL2 Com to
REL 3 COM.
1/ For the A21REL-12 power connections, connect +12V and G to a system or external
power supply. Do not connect to the +12V or G terminals on the CR6 or VOLT116.
Sensor Quantity
0 or 1,
only use
CNF4
with a
CNR4
C.2.3.7 Precipitation Gage
TABLE C-7. A21REL-12 Wiring
Connecting Terminal
System +12V
System GND
VOLT116 SW5V #1
VOLT116 SW5V #2
VOLT116 SW5V #3
TABLE C-8. CNF4 Wiring
Wire Description
Tachometer Output
Tachometer
Reference
Ventilator Power
Ventilator Ground
Heater #1 Power
Heater #1 Ground
Heater #2 Power
Heater #2 Ground
EasyFlux DL CR6KH20 can support a single TE525MM tipping rain gage. The
default wiring for the precipitation gage is shown in TABLE C-9.
Appendix C. EasyFlux
Cable/Wire
CABLEPCBL-1,
1/
red wire
CABLEPCBL-1,
1/
black wire
CABLE3CBL-1,
red wire
CABLE3CBL-1,
black wire
CABLE3CBL-1,
white wire
Color Terminal
Green CR6 U11
CR6 ⏚
Grey
A21REL-12
Yellow
REL 1 NO
A21REL-12
Brown
REL G
A21REL-12
White
REL 2 NO
A21REL-12
Red
REL G
A21REL-12
Black
REL 3 NO
A21REL-12
Blue
REL G
® DL CR6KH20
C-8