5
Instrument connection
The connection between the instrument and the sensor: the power supply, output signal, relay alarm contact and the
connection between the sensor and the instrument are all inside the instrument, and the wiring is as shown above. The
length of the cable lead fixed by the electrode is usually 5-10 Meters, insert the corresponding label or color wire on the
sensor into the corresponding terminal inside the instrument and tighten it.
RLY1 RLY2 RLY3
G
,
L,N
V+,V-,RX,TX
V+,V-,A,B
V+,V-,A,B
A1,B1
+,-
3 groups of relay
G-ground wire, L-live, N-neutral
RS232 communication output
Digital input channel 1
Digital input channel 2
RS485 communication output
DC power supply
EC1,EC2,EC3,EC4
T+,T-
INPUT
REF
S+,S-
CE,RE,WE
I
1,G,
I
2
I
3,G,
I
4
Electrical conductivity/resistivity wiring
Temperature connection
pH/ORP/lon
measure
pH/ORP/lon
reference
Membrane dissolved oxygen, FCL
Constant voltage residual chlorine/
chlorine dioxide/ozone
Output current
Input current
Tips: If the user dials the wire by himself, lengthens the cable or shortens
the cable,
Take care to remove the black conductive skin outside the transparent
wire.
To prevent short circuit from the reference end of the electrode, please
use a multimeter to check
Use the pH dedicated cable connection.
RLY1 RLY2 RLY3 G N L
AC220V
EC1 EC2 EC3 EC4 T+ T- INPUT REF S+ S- WE RE CE I1 G I2 I3 G I4
COND
V+ V- RX TX
RS232
V+ V- A B
SENSOR1
V+ V- A B A1 B1 + -
SENSOR2 485 DC24
pH DO/FCL FCL/DOZ mA1 mA2 mA3 mA4
TEMP
