Parameters for the TB20 analog input module
- Diagnostic alarm: On | Off
- Overflow / underflow diagnosis: On | Off
- Representation values: SIMATIC* S7 | SIMATIC* S5
Parameters for each channel
- Wire break detection (only for 4 … 20 mA): On | Off
- Interference frequency suppression: None | 10 Hz | 50 Hz | 60 Hz | 400 Hz
- Measuring ranges:?Deactivated | 0 … 20 mA | 4 … 20 mA | ?20 mA
- Limit value alarms enabled: On | Off
- Upper/lower limit: 16 bit analog value (?27648)
Channel LED signals
| Flashing red light | Parameter assignment error on channel | |
| Solid red light | Reading overflow/underflow or wire break | |
| Flashing green light | Reading within overrange | |
| Solid green light | Channel configured, normal reading | |
| Off | Channel disabled or module not yet configured |
- Channels electrically isolated from each other and from the backplane bus
- Measuring ranges 0 … 20 mA, 4 … 20 mA, ?20 mA, individually configurable for each channel
- Measurement resolution: up to 15 bits + sign
- Diagnostic messages
- Wire break detection (for 4 … 20 mA)
- Limit value alarms for each channel
- A bi-color LED (blue/red) indicates the module operating status and any malfunctions
- Red/green bi-color LEDs (one for each channel) indicate the channel status
- 8 analog inputs for measuring current
- 8 process input words
Part of the Helmholz decentralized fieldbus I/O system – TB20
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