<h2>Overview</h2>
<p>The <strong>Pilz PNOZ s7 safety relay expansion module</strong> is a contact expansion unit designed for safety-critical industrial automation systems. It extends the available instantaneous safety contacts on compatible base units operating at 24VDC nominal supply. As a certified safety component, this expansion module meets EN 60947-5-1, EN 60204-1, and VDE 0113-1 standards, delivering SIL3/PL.e performance when used with compatible base units.</p>
<h2>Key Features</h2>
<ul>
<li>4 instantaneous safety contacts (N/O), 6A @ 24VDC DC-1</li>
<li>1 auxiliary contact (N/C), 6A @ 24VDC DC-1</li>
<li>Positive-guided relay outputs with safe contact separation per EN 60947-1 (6 kV)</li>
<li>SIL3 / PL.e / Category 4 certified safety performance</li>
<li>LED indicators for input status (channels 1 & 2), switch status, and fault conditions</li>
<li>DIN rail mounting (35 mm) with optional vertical installation brackets</li>
<li>Component failure fault detection and earth fault monitoring</li>
</ul>
<h2>Technical Specifications</h2>
<ul>
<li><strong>Supply Voltage:</strong> 24VDC nominal (19.2–28.8 VDC operating range)</li>
<li><strong>Input Circuit:</strong> 1 digital input, 24VDC, 70mA max.</li>
<li><strong>Safety Contacts (N/O):</strong> 6A @ 24VDC DC-1; 6A @ 240VAC AC-1</li>
<li><strong>Auxiliary Contact (N/C):</strong> 6A @ 24VDC DC-1; 6A @ 240VAC AC-1</li>
<li><strong>Switching Load (DC-13):</strong> 5A @ 24VDC</li>
<li><strong>Switching Load (AC-15):</strong> 5A @ 230VAC</li>
<li><strong>Operating Mode:</strong> Single-channel or dual-channel (with PNOZsigma base unit)</li>
<li><strong>Connection Type:</strong> Plug-in spring-loaded or screw terminals</li>
<li><strong>Mounting:</strong> DIN rail (35 mm), width 17.5 mm</li>
<li><strong>Certifications:</strong> EN 60947-5-1, EN 60204-1, VDE 0113-1, EN 62061, EN ISO 13849-1, TÃœV, CSA, CE, cULus, EAC, KOSHA, CCC</li>
<li><strong>Safety Level:</strong> SIL3 / PL.e / Cat.4 (PFH = 2.31E-09)</li>
<li><strong>Wire Rating:</strong> Copper conductors rated 60/75 °C</li>
</ul>
<h2>Typical Applications</h2>
<ul>
<li>Emergency stop (E-STOP) circuits requiring increased safety contact availability</li>
<li>Machinery safety systems needing expanded output contacts</li>
<li>Safety interlocking and guard locking control systems</li>
<li>Industrial automation systems with safety-related control requirements</li>
<li>Hazardous area control and monitoring (per EN 60947-5-1, EN 60204-1)</li>
<li>Multi-circuit safety applications requiring positive-guided contacts</li>
</ul>
<h2>Compatibility & Replacements</h2>
<h3>Compatible With</h3>
<ul>
<li>PNOZsigma base units (all safety relays with feedback loop monitoring)</li>
<li>PNOZ s4 series safety relays</li>
<li>PNOZ s7 base unit (via supplied connector for dual-channel operation)</li>
<li>24VDC industrial automation control systems</li>
<li>Standard DIN rail enclosures (35 mm rail)</li>
</ul>
<h3>Replaces / Drop-In Replacement For</h3>
<ul>
<li>PNOZ s7 (750 107) — standard version with screw terminals</li>
<li>PNOZ s7 C (751 107) — spring-loaded terminal variant</li>
<li>PNOZ s7 C coated (751 187) — coated spring-loaded terminal version</li>
</ul>
<h3>Works With</h3>
<ul>
<li>PNOZsigma connector interface (multi-unit cascading)</li>
<li>Standard industrial relay logic control systems</li>
<li>Safety-related control systems per IEC 61508 (SIL) and ISO 13849-1 (PL)</li>
<li>Conventional industrial automation platforms (non-networked)</li>
</ul>
