Wiring

NOTE:

Power down the system before wiring the CS451/CS456.

Wire color, function, and data logger connection for SDI-12 measurements provides data logger connections when using SDI-12 and Wire color, function, data logger connection, and RS-232 pin provides data logger connections when using RS-232.

Wire color, function, and data logger connection for SDI-12 measurements
Wire color	Wire function	Data logger connection
White	SDI-12 signal	C terminal or U configured for SDI-12¹
Clear	Shield	⏚ (analog ground)
Red	Power	12V, Battery+
Black	Power ground	G
Blue	Ground	G
Yellow	Ground	G
1 U terminals are automatically configured by the measurement instruction.

For the CR6 and CR1000X data loggers, triggering conflicts may occur when a companion terminal is used for a triggering instruction such as TimerInput(), PulseCount(), or WaitDigTrig(). For example, if the CS451 is connected to C3 on a CR1000X, C4 cannot be used in the TimerInput(), PulseCount(), or WaitDigTrig() instructions.

Wire color, function, data logger connection, and RS-232 pin
Wire color	CS451/CS456 function	Data logger connection	RS-232 9-pin
Red	+12vdc	12V, Battery+
Black	Power ground	G
White	RS-232 Tx (output)	Odd-numbered C terminal	Pin 2 Rx (input)
Blue	RS-232 Rx (input)	Even-numbered C terminal	Pin 3 Tx (output)
Yellow	Digital ground	G	Pin 5 GND
Clear	Shield GND	G