12
ATR 421 - User manual
Examples of connection for linear input AI1
12
11
0...10V
For linear signals 0….10V
• Comply with polarity
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
17
12
11
B
C
A
4...20
m
A
For linear signals 0/4….20mA with
three-wires
sensors
• Comply with polarity
C = Sensor output
B = Sensor ground
A = Sensor supply (24Vdc/25mA)
PRESSURE TRANSMITTER
SENSORE DI PRESSIONE
E
x
ternal Suppl
y
Ali
m
entazione esterna
12
11
C
B
4...20
m
A
For linear signals 0/4..20mA with
external power
supply for sensor
• Comply with polarity
C = Sensor output
B = Sensor ground
SENSORE DI PRESSIONE
PRESSURE TRANSMITTER
11
17
C
A
4...20
m
A
For linear signals 0/4..20mA with
two-wires
sensors
• Comply with polarity
C = Sensor output
A = Sensor supply (24Vdc/25mA)
Digital input (ATR421-14ABC)
19
20
17
+24V
DI
(PnP)
0V
Digital input (parameter
dGt.i.
).
• Close terminal “DI” (19) on terminal “+24V” (17)
to activate digital input.
Summary of Contents for ATR 421
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