Digital input selection
UF20 digital input modules accept NPN and PNP signals for a UF20 I/O assembly. Select channel count, process data size and connection style together. The 32-channel MIL version has a connector interface; the other three models use push-in terminals.
| Model | Inputs | Data size | Interface | Width | System supply current |
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| UF20-8DI-NP | 8 | 1 byte | Push-in | 12mm | <19mA |
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| UF20-16DI-NP | 16 | 2 bytes | Push-in | 12mm | <65mA |
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| UF20-32DI-NP | 32 | 4 bytes | Push-in | 24mm | Not specified |
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| UF20-32DI-NP-M | 32 | 4 bytes | MIL connector | 24mm | Not specified |
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Shared input characteristics
| Characteristic | All four models |
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| Signal types | NPN and PNP |
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| Input connection | 1-line |
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| Operating voltage | 24V DC, +20%/-15% |
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| Reverse protection | Provided |
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| Isolation | Optical isolation |
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| Fault diagnosis | Supported |
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Push-in terminal wiring
The following conductor limits apply to UF20-8DI-NP, UF20-16DI-NP and UF20-32DI-NP. The UF20-32DI-NP-M uses its MIL connector instead of these push-in terminals.
| Characteristic | Push-in models |
|---|
| Conductor cross-section | 0.34-1.5mm² |
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| Conductor size | AWG22-AWG16 |
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| Stripping length | 8-10mm |
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Mounting and environment
| Characteristic | All four models |
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| Height × depth | 75mm × 105mm; width varies by model |
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| Mounting | 35mm DIN rail |
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| Ingress protection | IP20 |
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| Operating temperature | -10°C to +55°C |
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| Storage temperature | -20°C to +85°C |
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| Relative humidity | 5-95%RH, non-condensing |
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