Eight relay outputs for UF20 I/O
The UF20-8DO-R provides eight relay output channels with a one-byte process data interface. It combines optocoupler and relay isolation, and supports diagnostics, alarms, firmware upgrades and module fault self-recovery.
Output and isolation ratings
| Characteristic | UF20-8DO-R |
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| Output type | Relay |
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| Channels | 8 |
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| Process data | 1 byte |
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| Load categories | Resistive, inductive and lamp loads |
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| Maximum channel current | 2A for resistive loads |
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| Channel operating-voltage limits | 230V AC / 30V DC |
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| AC resistive rating on the nameplate | 240V AC, 2A |
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| DC resistive rating on the nameplate | 30V DC, 2A |
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| Isolation method | Optocoupler isolation and relay isolation |
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| Isolation withstand voltage | 1500V AC |
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| Module fault self-recovery | Supported |
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| Diagnostics | Supported |
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| Alarms | Supported |
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| Firmware upgrade | Supported |
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Use the 230V AC operating limit when selecting the application voltage. The nameplate's 240V AC resistive rating does not increase that operating limit. The 2A resistive rating must not be applied unchanged to inductive or lamp loads.
Supply and push-in wiring
| Characteristic | Specification |
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| Module operating voltage | 24V DC, +20%/-15% |
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| Connection method | Push-in terminal blocks |
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| 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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Dimensions and environment
| Characteristic | Specification |
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| Height × width × depth | 75mm × 24mm × 105mm |
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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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