Description
Core Product Summary (Brand / Model / Key Attributes)
The HIMA F 3330 is an 8-channel safety-related digital output module designed for HIMA planar safety systems. It switches resistive or inductive loads up to 500 mA (12 W) and supports lamp loads up to 4 W.
The module incorporates integrated safety shutdown, safe isolation, and the fail-safe behaviour that no output signal is present if the L– supply is interrupted. It is rated for requirement classes AK 1 to AK 6 and performs continuous automatic self-testing during operation.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product type | 8-channel safety-related digital output module |
| Number of channels | 8 |
| Output rating | 500 mA per channel, short-circuit proof (max. 12 W) |
| Lamp load | Up to 4 W |
| Internal voltage drop | Max. 2 V at 500 mA |
| Max. line resistance (in + out) | 11 Ω |
| Undervoltage tripping | ≤ 16 V |
| Short-circuit current trip | 0.75 … 1.5 A |
| Output leakage current | Max. 350 µA |
| Reset output voltage | Max. 1.5 V |
| Safety rating | Requirement class AK 1 … 6 |
| Space requirement | 4 TE |
| Power consumption | 5 V DC: 110 mA; 24 V DC: 180 mA + load |
Detailed Product Overview
The F 3330 is a classic HIMA 8-fold digital output module intended for safety-related applications. It drives resistive or inductive loads up to 500 mA (12 W) and can switch lamp loads up to 4 W. The outputs are short-circuit proof and feature a maximum internal voltage drop of 2 V at full load.
A key safety characteristic is the integrated safety shutdown: if the L– supply is interrupted, the outputs are forced to the off state and no signal is delivered to the field. The module provides safe isolation and is approved for requirement classes AK 1 through AK 6.
During normal operation the module continuously executes automatic self-tests. These include read-back of the output signals (0-signal detection threshold ≤ 6.5 V), verification of switching capability, and a walking-bit cross-talk test. The test pulse duration is limited to a maximum of 200 µs so that it does not affect connected loads.
For inductive loads an external free-wheeling diode (e.g., 1N4007 or 1N4448) must be fitted. The module occupies 4 TE in the HIMA rack and is connected via a front cable plug. A maximum of ten such output modules at nominal load is recommended per I/O rack. Outputs may be paralleled without external diodes when higher current is required.
F3330
F3330
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host system | HIMA planar / rack-based safety systems | Classic HIMA subrack |
| Load type | Resistive or inductive up to 500 mA (12 W) | Free-wheeling diode required for inductive loads |
| Lamp load | Up to 4 W | Higher lamp loads require special consideration |
| Power supplies | 5 V DC and 24 V DC from system | 110 mA at 5 V; 180 mA + load at 24 V |
| Connection | Front cable plug | Specific wiring diagrams in datasheet |
| Rack loading | Max. 10 modules at nominal load per I/O rack | Observe thermal and power limits |
Engineering Selection Highlights
- Eight short-circuit-proof 500 mA outputs in a compact 4 TE module.
- Suitable for both resistive and inductive loads (external free-wheeling diode required for inductive loads).
- Integrated safety shutdown – outputs de-energise if L– supply is lost.
- Continuous automatic self-test including output read-back and walking-bit cross-talk detection.
- Rated for safety requirement classes AK 1 to AK 6.
- Maximum line resistance of 11 Ω supports reasonable cable lengths.
- Outputs can be paralleled without additional diodes for higher current capacity.
Dimensions, Mounting & Connection Notes
The F 3330 is a plug-in module requiring 4 TE of rack space. Field wiring is connected via the front cable plug. An external free-wheeling diode must be installed across inductive loads. The official datasheet provides the block diagram, front-plug pin-out, and planning notes (including parallel operation and higher lamp-load circuits). Ensure correct polarity of the 24 V supply (L+ / L–) and proper earthing according to HIMA installation rules.
FAQ
What is the HIMA F 3330?
It is an 8-channel safety-related digital output module for HIMA systems, rated 500 mA per channel, with integrated safety shutdown and continuous self-testing.
What loads can it drive?
Resistive or inductive loads up to 500 mA (12 W) and lamp loads up to 4 W. An external free-wheeling diode is required for inductive loads.
What happens if the L– supply is lost?
The outputs are forced off; no output signal is delivered (integrated safety shutdown).
Does the module perform self-tests?
Yes. It continuously reads back the output signals, tests switching capability, and performs a walking-bit cross-talk test.
How much rack space does it require?
4 TE.
Can outputs be paralleled?
Yes, outputs can be paralleled without external diodes to increase current capacity.
What is the maximum number of modules per rack?
A maximum of ten F 3330 modules at nominal load is recommended per I/O rack.
Verification & Troubleshooting Notes
Confirm that free-wheeling diodes are correctly fitted on all inductive loads. Verify that the 24 V supply (including L–) is within tolerance and correctly polarised. Check that the total load and number of modules per rack remain within the recommended limits.
The module’s automatic self-test runs continuously; any detected fault is reported through the system diagnostics. If an output fails to switch or remains in an unexpected state, inspect field wiring, load current, line resistance, and the integrity of the front cable plug. Refer to the official HIMA F 3330 datasheet for the complete connection and test information.
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