Overview
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | F 3330 |
| Brand | HIMA |
| Product Type | Safety-Related Output Module |
| Number of Outputs | 8 |
| Maximum Output Current | 500 mA per output |
| Maximum Resistive or Inductive Load | 12 W |
| Maximum Lamp Load | 4 W |
| Safety Functions | Integrated safety shutdown, safe isolation |
| Requirement Class | AK 1 … 6 |
| Output Short-Circuit Protection | Short-circuit proof |
| Maximum Internal Voltage Drop | 2 V at 500 mA load |
| Maximum Admissible Line Resistance | 11 Ohm (input and output lines combined) |
| Undervoltage Tripping | At or below 16 V |
| Short-Circuit Current Operating Point | 0.75-1.5 A |
| Maximum Output Leakage Current | 350 uA |
| Maximum Output Voltage in Reset State | 1.5 V |
| Maximum Test Signal Duration | 200 us |
| Operating Current at 5 VDC | 110 mA |
| Additional Load Current at 24 VDC | 180 mA |
| Space Requirement | 4 TE |
| Weight | 0.14 kg |
| Estimated Shipping Dimensions | 2 x 19 x 12.8 cm |
| Country of Origin | Germany |
| Tariff Code | 8537101190 |
Output Operation and Load Limits
The F 3330 provides eight outputs for switching resistive or inductive loads. Each output supports a maximum current of 500 mA, subject to the specified load limits. Lamp connections must remain within 4 W per output, while the stated maximum for resistive or inductive loads is 12 W.
The module includes integrated safety shutdown and safe isolation. If the L- supply fails, the module does not provide an output signal. The undervoltage trip threshold is 16 V or below, so the supply conditions must remain within the applicable operating limits.
Automatic Testing and Fault Detection
The module automatically tests its operation while running. Its test routines check output signal readback, test-signal switching capability, and cross-talk between channels through a walking-bit test.
The readback circuit has a defined limitation: the operating point for reading back a logic 0 is 6.5 V or below. A fault that raises the logic-0 signal to a voltage within this undetected range may not trigger fault detection. Therefore, this threshold matters when assessing output diagnostics and fault behavior.
Electrical Constraints
The internal voltage drop reaches a maximum of 2 V at a 500 mA load. The combined resistance of the input and output lines must not exceed 11 Ohm. These limits should be considered when calculating the voltage available at the connected load.
The specified short-circuit current operating point is 0.75-1.5 A, and the maximum output leakage current is 350 uA. When an output is reset, its voltage remains at or below 1.5 V under the stated specification. The test signal lasts no longer than 200 us.
Installation and Load Planning
The module occupies 4 TE of rack space. Its load capacity also affects the overall output configuration of the I/O subrack.
- Limit each output to the specified load current and power.
- Check the combined input and output line resistance against the 11 Ohm maximum.
- Account for the 2 V maximum internal voltage drop when checking the load voltage.
- Verify the 24 VDC supply conditions and undervoltage protection requirements.
- Confirm the complete subrack load allocation against the applicable system documentation.
Frequently Asked Questions
Q: How many output channels does the HIMA F 3330 provide?
A: The F 3330 provides eight safety-related output channels. Each output supports up to 500 mA, with the connected load also subject to the applicable power limit.
Q: What automatic diagnostic tests does the F 3330 perform?
A: The module reads back output signals and tests switching capability and cross-talk using a walking-bit test. However, logic-0 readback faults that remain within the specified undetected voltage range may escape detection.
Q: What happens if the L- supply fails?
A: The module does not provide an output signal when the L- supply breaks. The module also has undervoltage tripping at or below 16 V.
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