| Part Number: | UF20 | - | 32 | DO | - | P | - | M |
|---|---|---|---|---|---|---|---|---|
| Explanation: |
Platform UF20 - UF20 expansion module platform |
Channels 8 - 8 channels, push-in terminals |
Function DO - Digital output |
Output Polarity N - NPN sinking outputs |
Connection Blank - Push-in terminals; omit this suffix and its preceding hyphen |
UF20 digital output modules provide NPN sinking or PNP sourcing outputs for 24VDC control circuits. Choose the channel count, output polarity and connection format together. Standard versions use push-in terminals; 32-channel models ending in -M use MIL connectors. These are UF20 expansion modules, with the network interface provided by the selected coupler.
| Model | Channels | Output type | Process data | Connection | Width |
|---|---|---|---|---|---|
| UF20-8DO-N | 8 | NPN | 1 byte | Push-in terminals | 12mm |
| UF20-8DO-P | PNP | ||||
| UF20-16DO-N | 16 | NPN | 2 bytes | ||
| UF20-16DO-P | PNP | ||||
| UF20-32DO-N | 32 | NPN | 4 bytes | 24mm | |
| UF20-32DO-P | PNP | ||||
| UF20-32DO-N-M | NPN | MIL connector | |||
| UF20-32DO-P-M | PNP |
| Output type | Inactive state, 0/OFF | Active state, 1/ON |
|---|---|---|
| NPN: all -N and -N-M models | 24VDC, ±25% | Nominal 0VDC; ±3% tolerance with unspecified reference quantity |
| PNP: all -P and -P-M models | Nominal 0VDC; ±3% tolerance with unspecified reference quantity | 24VDC, ±25% |
The percentage reference for the low-level ±3% tolerance is unspecified. It therefore does not establish an absolute low-level voltage limit. Signal-state voltage, working supply voltage and output-circuit voltage grade are separate specifications.
| Models | Working-voltage specification | System supply current |
|---|---|---|
| UF20-8DO-N | 24VDC, +20%/−15%; separate bus and output-circuit requirements below | 82mA typical at the 5VDC bus input |
| UF20-8DO-P | 24VDC, +20%/−15% | <19mA |
| UF20-16DO-N, UF20-16DO-P | <66mA | |
| All four 32-channel models | Not specified |
| Models | Conductor cross-section | AWG range | Strip length |
|---|---|---|---|
| UF20-8DO-N | 0.2-1.5mm² | 22-16AWG | 8-10mm |
| UF20-8DO-P, UF20-16DO-N, UF20-16DO-P, UF20-32DO-N, UF20-32DO-P | 0.34-1.5mm² | ||
| UF20-32DO-N-M, UF20-32DO-P-M | Not specified for MIL connection | Not specified | Not applicable to module connector |
| Property | All models |
|---|---|
| Wiring arrangement | 1-line |
| Side-envelope dimensions | 75 × 105mm, with model width as listed above |
| Mounting | 35mm DIN rail |
| Protection rating | IP20 |
| Reverse-polarity protection | Yes |
| Isolation method | Optical isolation |
| Module fault diagnosis | Yes; output-channel diagnostic functions are model-specific |
| Models | Operating temperature | Storage temperature | Humidity |
|---|---|---|---|
| UF20-8DO-N | -20°C to +60°C, subject to output derating | -20°C to +60°C | Operating <95%RH; storage <90%RH; non-condensing |
| Other seven models | -10°C to +55°C | -20°C to +85°C | 5-95%RH, non-condensing |
The following details apply specifically to UF20-8DO-N. Its eight sinking outputs switch loads connected to the positive field supply. They must not be used as ratings for the PNP, 16-channel or 32-channel variants.
| Parameter | UF20-8DO-N |
|---|---|
| Bus input | 5VDC nominal; 4.75-5.25VDC |
| Bus input current | 82mA typical at 5VDC |
| System-side electrical isolation | 500VAC |
| Output method | NPN sinking, low-level active |
| Output-circuit voltage grade | 24VDC ±10%, equivalent to 21.6-26.4VDC |
| Output indication | Channel indicator lights while its output is active |
| Output protection | Short-circuit and overcurrent protection |
| Load type | Per-channel limit | Per-module limit | Switching frequency |
|---|---|---|---|
| Resistive | 0.5A | 2A | 100Hz |
| Inductive | 7.2W | 7.2W | 0.5Hz |
| Lamp | 5W | 5W | 10Hz |
At 55°C, apply the specified 50% output derating and keep the combined current of simultaneously active outputs at or below 0.5A. When every output is active, apply a 10°C temperature derating. Observe the load-type limits and the simultaneous-output conditions together.
| Parameter | Requirement |
|---|---|
| Atmosphere | No corrosive gases |
| Altitude | Below 2000m; 80kPa reference |
| Pollution degree | 2 |
| Overvoltage category | II |
| Power-line immunity | 2kV, IEC 61000-4-4 |
| EMC environment | Zone B, IEC 61131-2 |
| Vibration | IEC 60068-2-6: 5-8.4Hz at 3.5mm amplitude; 8.4-150Hz at 9.8m/s²; X, Y and Z axes, 100 minutes per axis in ten 10-minute cycles |
| Shock | IEC 60068-2-27: 9.8m/s², 11ms; three shocks in each of six directions across the X, Y and Z axes |
| Indicator | Colour and state | Meaning |
|---|---|---|
| 00-07 channel LEDs | Green on / off | Corresponding output active / inactive |
| STA | Green flashes at 2.5Hz; red off | Internal bus has not started |
| Red flashes at 2.5Hz; green off | Internal bus offline | |
| Green continuously on; red off | Normal operation | |
| Red and green alternate at 0.5Hz | Upgrade mode | |
| Red and green flash rapidly together | Firmware upgrade in progress | |
| PR | Green on / off | System power normal / abnormal |
| Ps | Internal field power normal / abnormal | |
| Pf | External field power normal / abnormal |
| Hardware feature | Function |
|---|---|
| Grounding spring contact | Ground connection through the 35mm DIN rail |
| Latch | Secures the module to the 35mm DIN rail |
| Terminals | Signal and field-power connections |
| Status indicators | Channel and module state indication |
The UF20-8DO-N outline has a 105mm vertical extent, 75mm depth and 12mm width in the upright rail-mounted view.
Connect the external positive field supply to A9 and its 0VDC return to B9. Each load connects between the positive supply and its assigned sinking output. B1-B8 have no signal assignment in this layout.
| Left signal | Left terminal | Right terminal | Right signal |
|---|---|---|---|
| Output 00 | A1 | B1 | Unassigned |
| Output 01 | A2 | B2 | |
| Output 02 | A3 | B3 | |
| Output 03 | A4 | B4 | |
| Output 04 | A5 | B5 | |
| Output 05 | A6 | B6 | |
| Output 06 | A7 | B7 | |
| Output 07 | A8 | B8 | |
| +24V | A9 | B9 | COM, 0VDC |
| Insulated ferrule | Conductor cross-section | Ferrule length L |
|---|---|---|
| E0310 | 0.3mm² | 10mm |
| E0510 | 0.5mm² | |
| E7510 | 0.75mm² | |
| E1010 | 1.0mm² | |
| E1510 | 1.5mm² |
| Output data | Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
|---|---|---|---|---|---|---|---|---|
| Byte 0 | Channel 7 | Channel 6 | Channel 5 | Channel 4 | Channel 3 | Channel 2 | Channel 1 | Channel 0 |
A bit value of 1 activates the corresponding NPN output at a low electrical level; 0 makes the output inactive.
| Function | UF20-8DO-N behaviour |
|---|---|
| Fault-stop output state | Retain current value |
| Output-port abnormality detection and indication | Not provided |
| Configurable output logic level | Not supported |
| Independent channel-enable configuration | Not supported |
| Configurable diagnostic reporting | Not supported |
| Stopped mode | Follow the fault-stop state mode and preset value; no further refresh |
| I/O mapping access | Bit, byte and word access |
Fit UF20-8DO-N into the adapter arrangement, release the upper latch, place the module on the DIN rail and press the latch to secure it. For removal, disconnect its signal and power cables, release the latch and withdraw modules in sequence along their guides. If a module resists insertion, inspect for obstruction before trying again.
The UF20-8DO-N guide includes connection and commissioning examples with UF20-RTU-PN in TIA Portal V17 and UF20-RTU-EC in TwinCAT. Select the coupler, device description and module order for the actual system. The examples do not establish interchangeability with UE20 or other module platforms.
| UL use group | Rated current | Rated voltage | Rated cross-section |
|---|---|---|---|
| B | Not specified | Not specified | Not specified |
| C | |||
| D |
Output load capacity and switching frequency for models other than UF20-8DO-N are not specified here. Use the model-specific circuit requirements when selecting loads.
