C400 Series Operating Manual
5
Instrument Connection
CELL 1
NO 1
CELL 2
COM 1
CELL 3
NC 1
CELL 4
NO 2
Temp
COM 2
Temp
NC 2
N/C
COND
N/C
N/C
Pow DC+
(9–36V)
Cur 1+
Pow DC-
Com -
Pow PE
Cur 2+
RS
-
485 B
RS
-
485 A
Pow ACL
(9–36V)
Pow AC N
Pow PE
Tip: If the user needs to lengthen or
shorten the cable, please remove the black
conductive skin outside the transparent
wire to prevent short circuit between the
black conductive skin and the reference
end of the electrode. Multimeter can be
used to check.
Terminal
Function
Terminal
Function
CELL 1
Conductivity Sensor Input 1
NO 1
High set relay working position
CELL 2
Conductivity Sensor Input 2
COM 1
Alarm relay common
CELL 3
Conductivity Sensor Input 3
NC 1
High set relay resting position
CELL 4
Conductivity Sensor Input 4
NO 2
Low set relay working position
Temp
Temperature sensor Input
COM 2
Alarm relay common
Temp
Temperature sensor Input
NC 2
Low set relay resting position
N/C
No Connection
N/C
No Connection
Pow DC +
DC power + (9 – 36V)
N/C
No Connection
Pow DC -
DC power -
Cur 1 +
Current output 1+
Pow PE
Earth wire
Com -
Current output common
Cur 2 +
Current output 2+
Pow ACL (85 – 265V)
Live wire
RS485 B
Communication Terminal
Pow AC N
Neutral wire
RS485 A
Communication Terminal
Pow PE
Earth wire
Dimension
