Siemens TX-I/O TXM1.8X-ML - Analog input functions; Measurement

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Siemens TX-I/O™ Module system – Functions and operation CM110561en_08
Building Technologies Analog input functions 2018-10-25
4 Analog input functions
4.1 Measurement
The following analog variables can be processed:
– Temperature, via resistance sensors
– Resistance
– Voltage
– Current
Configurable signal types
Description
Signal type
Signal
Range
Under /
Reso-
I/O
LCD
Error indication
TRA
type
over range
6)
lution
status
LED
Shorted
Under range
Over range
Open circuit
No current transmitter
Unreliable (gen.)
4)
Resistance &
AI Pt1000 P1K
0...2500 Ω
0...2650 Ω
100 mΩ
OFF
Sensor type
x x
temperature
AI Pt100
2), 8)
P100
0...250 Ω
0...265 Ω
20 mΩ
OFF
(No LCD)
No LCD
2), 8)
AI 2500 Ohm
R2K5
0...2500 Ω
0...2650 Ω
100 mΩ
variable
variable
x x
AI 250 Ohm
2)
R250
0...250 Ω
0...265 Ω
10 mΩ
variable
(No LCD)
No LCD
2)
Temperature
AI Ni1000
R1K
-50...150°C
-52.5...155 °C
10 mK
OFF
Sensor type
x x x x
AI Ni1000
extended
Ni1K
-50...150
(180) °C
1)
-52.5 ...185 °C
10 mK
OFF
Sensor type
x x x x
AI PT1K375
(USA)
Pt1K 375 -50...150
(180) °C
1) 7)
-52.5 ...185 °C 10 mK OFF Sensor type
x x x x
AI PT1K385
(Europe)
Pt1K 385 -50...400
(600) °C
1)
-52.5...610°C 20 mK OFF Sensor type
x x x x
AI Pt100 4 wire
2), 8)
Pt100_4
-50...400
(600) °C
1)
-52.5...610°C
20 mK
OFF
(No LCD)
No LCD
2), 8)
AI NTC10K NTC10K -50...130
(150) °C
1)
-52.5...155 °C 10 mK OFF Sensor type
x x x x
AI NTC100K
NTC100K
-40...115 °C
-52.5...155°C
10 mK
(25 °C)
OFF
Sensor type
x x x
AI T1 (PTC)
T1
-40...125 °C
-52.5...155°C
10 mK
(25 °C)
OFF
Sensor type
x x x
Voltage
AI 0-10V
U10
0...10 V
-1.5...11.5 V
1 mV
variable
variable
x x x x
Current
AI 4-20 mA
I420
4...20 mA
1.6...22.4 mA
1
µ
A
variable
variable
x x x x
AI 0-20 mA
5)
I25
0...20 mA
-3.0...23 mA
1
µ
A
variable
variable
x x
1) (180) (600) (150) and NTC only with reduced hum injection, see [6]
2) The signal types AI Pt100, AI Pt100 4 wire and AI 250 Ohm run on the TXM1.8P module only, which has no LCD
display.
In the case of direct island bus integration, AI Pt100 4 wire and AI Pt100 are connected with 4 wires, AI 250 Ohm
with 2 wires.
In the case of P-bus BIM integration (V4), AI Pt100 (P100) is connected with 4 wires, AI 250 Ohm (R250) with 2 wires
and jumpers to 4 terminals (as PTM-I/O); connection diagram see data sheet N8176.
The resolution with island bus is significantly better than with P-bus BIM.
4) The "unreliable (general)“ error message is displayed:
– when AC 24 V (terminal V
) for field supply is not available or low (AI 0-10V)
– when DC 24 V (terminal V
, CS) for field supply is not available or low (AI 4-20mA, AI 0-20mA)
5) For 25 mA use signal type AI 0-10V and install a shunt of 400 Ohms (1 W, 0.1 %). Details: [7].
6) When the process value is out of range, an error message will be sent.
7) AI PT1K375: No restriction concerning hum injection for TXM1.8U und TXM1.8X.
8) An open circuit of a single conductor cannot be detected for these signal types.
Application