WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
3. Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 750107 |
| Manufacturer | Pilz |
| Series | PNOZ s7 (PNOZsigma) |
| Module Type | Contact expansion (safety) |
| Supply Voltage | 24 V DC |
| Power Consumption | ≈ 2 W |
| Safety Outputs | 4 × N/O (instantaneous) |
| Auxiliary Output | 1 × N/C (instantaneous) |
| Contact Rating | 6 A @ 24 V DC / 240 V AC |
| Contact Material | AgCuNi |
| Connection | Plug-in screw terminals |
| Mounting | DIN rail |
| Width | 17.5 mm |
| Dimensions (H × W × D) | 98 × 17.5 × 120 mm |
| Operating Temperature | −10 °C to +55 °C |
| Protection | IP20 / IP40 |
| Safety Category | Up to Cat. 4 / PL e (depends on base unit) |
| Standards | EN ISO 13849-1, EN 62061, EN 60204-1, EN 60947-5-1 |
4. Product Introduction
The Pilz 750107 is a PNOZ s7 contact expansion module from the PNOZsigma family. It adds four instantaneous normally-open safety contacts and one normally-closed auxiliary contact to a compatible PNOZ base unit. The expansion is monitored through the base unit’s feedback loop so the overall safety function remains intact.
Engineers select this module when a base safety relay does not provide enough output contacts for the required number of safety actuators or signaling devices. The narrow 17.5 mm housing keeps panel space minimal while still delivering 6 A switching capacity. It is intended for use only with Pilz base units that support feedback-loop monitoring; the achievable safety category cannot exceed that of the base device.
750107
750107
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| Expansion contacts do not close | No enable signal from base unit or open feedback loop | ✅ High | Verify feedback loop wiring between base unit and 750107; check base unit status LEDs | Close feedback loop correctly; confirm base unit is healthy |
| Safety outputs open after short time | Feedback loop fault or contact welding | ✅ High | Measure continuity of feedback circuit; inspect contacts for welding | Replace module if contacts welded; correct wiring |
| Auxiliary N/C contact incorrect state | Wiring error or failed relay | ✅ Medium | Check terminal labeling and measure contact state under power | Verify terminal assignment against datasheet |
| Module does not power up | Missing or reversed 24 V DC supply | ✅ High | Measure 24 V DC at supply terminals with correct polarity | Restore correct 24 V DC supply |
| Overall system drops below expected PL/Cat. | Expansion used beyond base unit capability | ✅ High | Compare base unit category rating with application requirements | Do not exceed the safety category of the base unit |
| Intermittent contact operation | Loose screw terminals or vibration | ❌ Low to Medium | Torque-check all screw terminals; inspect for vibration damage | Retighten terminals; secure module on DIN rail |
If the expansion still fails after these checks, document the base unit model, feedback-loop wiring, LED states, and clear photos of the terminals before contacting support.
6. Frequently Asked Questions (FAQ)
Q: Can the 750107 be used as a stand-alone safety relay?
No. It is a contact expansion module only. It must be connected to a compatible Pilz PNOZ base unit that provides the feedback-loop monitoring. Using it alone provides no safety function.
Q: What safety category or Performance Level can I achieve?
The 750107 itself does not set the category. The maximum achievable category or PL is limited by the base unit it is connected to. In a properly designed system with a suitable base unit it can support up to Category 4 / PL e.
Q: Are the safety contacts delayed?
No. All four N/O safety contacts and the N/C auxiliary contact are instantaneous.
Q: What is the maximum switching current?
6 A continuous at 24 V DC or 240 V AC. Do not exceed this rating.
Q: Does the module require external fusing?
Yes. Protect the contacts according to the load and applicable standards. The module itself does not contain output fuses.
Q: Can I mix this expansion with other PNOZsigma or older PNOZ modules?
It is designed for use with PNOZ base units that support feedback-loop monitoring. Always verify compatibility with the specific base unit model and wiring diagram before installation.
Q: Why choose a new original unit over a used one?
Safety components should be new or fully validated. A new original 750107 arrives with intact factory seals, known contact life remaining, and full traceability. Used units carry unknown cycle counts and potential contact wear that can compromise the safety function.
