Digital I/O, Relays And Analog Output Connections; Conductivity Sensor Module Connections; 2-Electrode Sensors - ABB AWT420 Commissioning Instructions

12 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 | C 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

Conductivity sensor module connections

2-electrode sensors

Sensor type RTD wiring
2025, 2045
2-lead
2077, 2078
3-lead
2085, 2089
2085* 2-lead
TB2 2-lead
2-lead
AC2xx
3-lead
*2085 cable attached cells
4-electrode sensors
Sensor type RTD wiring
TB4 2-lead
500 Ω
max.
Load
+
PSU
–
DRIVE +
1 2
Red –
Red –
Red –
Green –
Green –
Green –
DRIVE + SENSE +
1 2
Green Red
DRIVE –
3 4
– Black Green/Yellow Blue
– Black
– Blue
– Black
– Black
– Black
SENSE – DRIVE –
3 4
White Black
RTD 1 RTD 2
5 6
Brown
Brown Green/Yellow
Yellow Dark green
Blue Yellow
Blue/Red Yellow
Yellow Red
RTD 1 RTD 2
5 6
Blue Yellow Dark green
SHIELD RTD 3
7 8
– –
– Blue
– –
Dark green –
Dark green –
Dark green Blue
SHIELD RTD 3
7 8
–