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Helmholz AI 2/4 x R, RTD, 16-Bit, 2/3/4-wire
General characteristics
- 2/4 inputs for measuring resistance (electrically isolated from the backplane bus)
- 4 process input words
- Measuring ranges: 150 ohms, 300 ohms, 600 ohms, 3000 ohms, 6000 ohms, PT100, PT1000, Ni100, Ni1000, LG-Ni1000, individually configurable for each channel
- Can accommodate 2/3/4-wire sensors
- Measurement resolution of 15 bits + sign
- Diagnostic messages
- Wire break detection
- Limit value alarms for each channel
- A bi-color LED (blue/red) indicates the module’s operating status and any malfunctions
Module parameters
- Diagnostic alarm: ON | OFF
- Overflow/underflow diagnosis: ON | OFF
- Representation values: SIMATIC* S7 | SIMATIC* S5
- Temperature unit:
Celsius x 10 | Fahrenheit x 10 | Kelvin x 10
Parameters for each channel
- Wire break detection: ON | OFF
- Interference frequency suppression: None | 10 Hz | 50 Hz | 60 Hz | 400 Hz
- Measuring range: 150 ohms | 300 ohms | 600 ohms | 3,000 ohms | 6,000 ohms | PT100 | PT1000 | Ni100 | Ni1000 | LG-Ni1000
- Sensor type: Disabled | 2-wire | 3-wire (channels 0 & 2 only) | 4-wire (channels 0 & 2 only)
- Limit value alarms enabled: ON | OFF
- Upper/lower limit: 16-bit analog value (±27648)
Technical data/Ordering data
Analog Input Module - AI 2/4 x R, RTD, 16-Bit, 2/3/4-wire
S/N: 600-253-4AD01
Number of inputs: 2/4
Electrically isolated from backplane bus: Yes
Channels electrically isolated from each other: No
Current draw
- External: Not required
- Internal: Max. 140 mA
Verlustleistung: Max. 1.0 W
Measuring ranges: 150 ohms
300 ohms
600 ohms
3,000 ohms
6,000 ohms
PT100
PT1000
Ni100
Ni1000
LG-Ni1000
Measuring method: Integration
Measurement resolution: 15 bits + sign
Interf. frequency suppression: None | 10 Hz | 50 Hz | 60 Hz | 400 Hz
Diagnoses: Upper measuring range limit exceeded (overflow)
Lower measuring range limit fallen below (underflow)
Wire break
Parameter assignment error
Process alarms: Upper and lower limit per channel
Error limits
- Operational error limit: ±0.5 % within the entire temperature range, relative to the nominal range
- Basic error limit: ±0.3 %, operational error limit at 25 °C, relative to the nominal range
- Temperature error: ±0.005 %/K relative to the nominal range
- Linearity error: ±0.05 %/K relative to the nominal range
- Repeating accuracy in steady state at 25 °C: ±0.05 %/K relative to the nominal range
Parameter configuration length: 26 bytes
Group error indicator: Red LED
Hot-pluggable: Yes
Dimensions (H x W x D): 110 mm x 14 mm x 73 mm
Weight: Approx. 70 g
