PILZ Safety Relay 750104 PNOZ s4

Independent safety relay of PILZ PNOZsigma series, 24VDC power supply, 3NO+1NC+1SO output. Compliant with safety levels PL e / Cat.4 / SIL 3, suitable for safety loop monitoring such as emergency stop, safety door and safety light curtain.

1. Definizione del segmento del modello

2. Core Specification Parameter Table

3. Elenco degli accessori & Linee guida per l'installazione

3.1 Standard Package Contents

– PNOZ s4 safety relay main unit (750104)

– Plug-in screw terminal module (preinstallato)

– Product manual (including wiring diagram)

– Mounting clip (for DIN rail)

3.2 Accessori opzionali

3.3 Punti chiave dell'installazione

Tipo di montaggio: Standard DIN 35mm rail mounting, snap-fit fixation

Metodo di cablaggio: Plug-in spring terminal; wire cross-section 0.5–2.5mm², massimo. torque 0.8Nm

Spacing Requirement: Reserve ≥5mm left/right, ≥10mm up/down for heat dissipation

Specifiche di cablaggio: Separate safety loop and power loop wiring to avoid electromagnetic interference

4. Wiring Schematic (Core Loop)

[24VDC+] ──┬─── [A1] Relay Power Positive

│

[24VDC-] ──┴─── [A2] Relay Power Negative

Emergency Stop Button (NC) ── [S11] ──┬─── [S12]

│

Safety Door Contact (NC) ── [S21] ──┴─── [S22]

Reset Button ──┬─── [S34] Reset Loop

│

[S33] ─────────┘

Safety Output:

[13] ── [14] NO Contact 1 (Main Loop)

[23] ── [24] NO Contact 2 (Control Loop)

[33] ── [34] NO Contact 3 (Alarm Loop)

Auxiliary Output:

[41] ── [42] NC Contact (Indicazione di guasto)

Status Feedback:

[Y32] ── PNP Semiconductor Output (PLC Signal Input)

Nota: Select single/dual-channel mode and short-circuit detection function according to actual safety requirements.

5. Funzioni & Scenari applicativi

5.1 Funzioni principali

1. Dual-channel Redundant Monitoring: Dual-channel input circuit design, safely cutting off output upon fault.
2. Inter-contact Short-circuit Detection: Optional function to prevent safety failure caused by contact adhesion.
3. Forced Guided Contacts: Safety output contacts adopt forced guided structure to ensure reliable disconnection.
4. Self-diagnosis Function: Real-time internal circuit monitoring; cut off output and indicate fault immediately when abnormal.
5. Flexible Reset Mode: Support automatic reset (power-on reset) and manual reset (rising-edge trigger).

5.2 Scenari applicativi tipici

6. Cross-brand Alternative Comparison Table

7. Linee guida per la selezione & Soluzioni alternative

7.1 Selection Mnemonic Rule

Voltage Matching → Contact Quantity → Safety Level → Input Type → Reset Mode → Space Limitation

7.2 Selection Decision Tree

1. Tensione di alimentazione: Confirm system is 24VDC (750104) or 48–240V AC/DC (750134 / 751134).
2. Output Requirement: 3NO+1NC+1SO meets most scenarios; choose PNOZ s5 (4NA+1NC) per ulteriori contatti.
3. Safety Level: PL e/Cat.4/SIL 3 is mandatory for high-risk scenarios such as heavy machinery and robotics.
4. Tipo di ingresso: Select IN2- mode if short-circuit detection is required; IN2+ if not needed.
5. Reset Mode: Automatic reset for unattended occasions; manual reset for manned operation areas.

7.3 Recommended Alternative Solutions

1. Budget Limited: Choose Weidmüller SRB series (conveniente) or domestic Chint NJB1 series (basic safety level).
2. Integrazione del sistema: Siemens 3RK3 series (seamless connection with S7 PLC) or Schneider XPS series (compatible with Modicon PLC).
3. Espansione delle funzioni: Match with PNOZ s pIE / nIE pulse extension modules to realize complex safety logic.
4. Space Limited: Keep PNOZ s4 (22.5mm narrow design), avoid wide-body models.
5. Air Freight Compliance & Certificazione

Certificazione CE: Conforme alla norma EN ISO 13849-1, CEI 61508, CEI 62061.

Air Freight Judgment: No built-in lithium battery / supercapacitor; belongs to ordinary industrial electronic equipment, no special air freight restrictions.

Packaging Requirement: Anti-static packaging; transport temperature: -40℃ ~ +85℃.

9. Troubleshooting Quick Reference

PNOZsigma Basic Safety Relay Series — Full Model & Ordine n. List