Digital I/O, Relays And Analog Output Connections; Ph And Conductivity Connections; Ph/Orp/Pion Sensor Module Connections - ABB AWT420 Operating Instruction

14 AW T4 2 0 | U N I V E R S A L 4 - W I R E , D U A L- I N P U T T R A N S M I T T E R | O I/A W T4 2 0 - E N R E V. B
...5 Electrical installation
Digital I/O, relays and analog output
connections
Relay and analog outputs
Relays (1 to 4)
N/O
Load
COM
N/C
Load
Analog outputs (1 to 4)
+
–
Digital output (open collector)
EXT PSU 12 to 30 V DC (150 mA max.)
DIO
DIO COM
Digital input (volt-free)
DIO
DIO COM
Figure 10 Digital I/O, relays and analog output connections
500 Ω
max.
Load
+
PSU
–

pH and conductivity connections

pH/ORP/pIon sensor module connections

NOTICE
ORP (Redox) and Antimony pH sensors do not feature
temperature compensation therefore do not have
temperature sensors or related wiring.