Optimize Performance New Safety Relay PILZ PNOZ 16SP 777075 Original Good Price

The PILZ PNOZ 16SP, Order No. 777075, is a standalone safety relay engineered for the “classic” safety tasks that show up on real machines every day: monitoring an emergency stop circuit and safety gates, then switching the machine’s safety contactor chain in a predictable, service-friendly way. This specific variant is designed for panels that commonly use 120 VAC control power while still relying on 24 VDC for sensors, status signals, or downstream control interfaces. 

Safety relays are not glamorous. They are supposed to be boring in the best way: consistent, deterministic, and easy to validate. Pilz positions the wider PNOZ safety relay family as devices that monitor safety functions such as emergency stop and safety gates (among other functions), and they are widely used in industrial machinery. 
Within that landscape, the PNOZ 16SP 777075 focuses on a practical feature set: 1-/2-channel input wiring with detection of shorts across contacts, 2 N/O safety relay outputs, and 2 semiconductor outputs for diagnostics or signaling, plus automatic/manual reset options for restart design. 

Why the 777075 variant matters

In many North American-style control cabinets, 120 VAC is still a workhorse supply for control power distribution, while 24 VDC remains the default for modern sensors and PLC I/O. The 777075 is explicitly listed as UB 120 V AC / 24 V DC, which can simplify integration when your cabinet already has both rails available and you want your safety relay to sit comfortably in that mixed-voltage environment. 

Key Specifications (PNOZ 16SP 777075)

How It Works in a Machine Safety Chain

A safety relay like the PNOZ 16SP typically sits between your safety devices (E-stop pushbuttons, gate switches) and the final switching elements (contactors, safety-rated power removal). The two N/O safety contacts are commonly used to drive redundant contactor coils or safety contactor paths, while the semiconductor outputs can feed a PLC input so operators and maintenance teams can see “safe enabled” or “fault/feedback” status without turning the PLC into the safety decision-maker. 

The unit supports automatic or manual reset. That matters because restart behavior is a safety function in itself: on many machines, a manual reset requirement is used to prevent unexpected restart after a guard is closed or an E-stop is released. The 777075 explicitly supports both reset concepts, giving you flexibility to align the panel behavior with your risk assessment and site standards. 

Application Fit: Where 777075 Shines

Pilz also describes PNOZ safety relays generally as having international certification, diagnostic convenience, and faster commissioning with plug-in terminal options (benefits that match the maintenance reality of many factories). 

Panel-Building and Commissioning Notes

Electrical ratings in datasheets are often misunderstood, so here’s the practical interpretation: the 777075 lists utilisation categories and example ratings including AC1 240 V / 8 A, DC1 24 V / 8 A, and AC15 230 V / 5 A, plus UL pilot duty C300/R300. These classifications help you select appropriate downstream loads (especially contactor coils and control-circuit loads) and remain inside intended switching conditions. 
Always select the final switching elements (contactors, contactor coil suppression, fusing) based on your actual load type and inrush, not just the “headline amps.”

Environmental specs are equally important for long-term stability. The device is listed for -10 to +55 °C, IP40 housing, and explicitly states condensation not permitted. If a cabinet is subject to washdown air, temperature cycling, or poor ventilation, these are the conditions that turn a clean safety design into intermittent downtime. 

Maintenance and Spare-Part Practicalities

One small but very real advantage in the field is reducing rewiring during replacement. The product listing identifies plug-in terminals of screw type, and even calls out an optional accessory: PNOZ X Set plug-in screw terminals P3 + P4 (Part No. 374281). Keeping spare terminal sets can speed device swaps and lower the risk of wiring errors during urgent maintenance. 

Summary

The PILZ PNOZ 16SP 777075 is a focused, cabinet-friendly safety relay for E-stop and safety gate monitoring, built around a highly practical configuration: 120 VAC supply with 24 VDC support, 2 N/O safety relay contacts, and 2 semiconductor outputs for signaling/diagnostics. It supports 1-/2-channel wiring with shorts-across-contacts detection and offers automatic or manual reset, letting you implement restart behavior that matches your safety concept. 

If you are standardizing panels, the simplest procurement rule is: match the exact order number 777075 to keep the same supply combination and I/O structure. That single detail prevents a surprising number of “it almost fits” headaches later