Schmersal PROTECT SRB 402EM-24V Safety-Monitoring Module
The Schmersal PROTECT SRB 402EM-24V (Part No. 101170840) is a safety-monitoring extension module designed to expand and multiply the output contacts of primary safety relay controllers in industrial safety systems. Operating on 24 VAC/VDC, it provides 4 safety NO outputs and 2 auxiliary NC contacts for reliable safety signal distribution and control. The module features a compact DIN-rail mount design, low power consumption, and high switching capacity for demanding machine safety applications.
BRAND
SCHMERSAL
TYPE
Safety-Monitoring Extension Module / Contact Multiplier
PART NO.
101170840
MODEL
SRB 402EM-24V
Full Technical Specifications ▶
| Parameter | Value / Description |
|---|---|
| BRAND | SCHMERSAL |
| TYPE | Safety-Monitoring Extension Module / Contact Multiplier |
| PART NO. | 101170840 |
| MODEL | SRB 402EM-24V |
| Voltage Rating | 24 VDC / VAC (via clamp A1 / A2) |
| Application | Contact multiplication and output expansion for primary master safety relay control circuits |
| IEC | EN 60204 / EN ISO 13849-1 / IEC 61508 / IEC 60947-5-1 |
| Internal Switching Layout | 4 NO (Normally Open) safety paths | 2 NC (Normally Closed) auxiliary contacts |
| Current Consumption | Max. 50 mA |
| Safety Switching Capacity (NO) | DC13: 24 V / 8 A | AC15: 230 V / 8 A max switching loads |
| Rated Insulation Voltage | 250 V AC |
| Mechanical Service Life | Engineered to clear up to 10⁷ active physical switching cycles smoothly |
| Wiring Cross-Section Limits | 28-12 AWG |
| Mounting Orientation | 35 mm DIN rails |
| Enclosure Protection Class | IP40 upper housing face plate coverage | IP20 finger-safe terminal arrays |
| Made In | Germany |
| REF NO | 159 |
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