Pilz 773600 Input Module – PNOZsigma Series

The Pilz 773600 is a digital input module belonging to the PNOZsigma range of safety automation products. Designed to interface safety devices such as emergency stop pushbuttons, safety switches, light curtains, and two-hand controls with a safety logic system, this module provides reliable signal acquisition for critical machine functions. It supports up to 8 safety inputs, configurable for dual-channel operation and cross-circuit monitoring.

Technical Overview

The module operates on 24V DC (SELV/PELV) power supply. Each input channel is tested for short circuits and cross faults, achieving high diagnostic coverage (DC avg > 99%) as required by ISO 13849-1 up to PL e and SIL CL 3 per IEC 62061. The 773600 communicates via the PNOZsigma backplane bus with a base unit or configurable safety controller, allowing seamless expansion of safety I/O. Status indicators (LEDs) per channel provide local diagnostics for power, input status, and internal faults.

Configuration is performed using the PNOZsigma Configurator software, which enables setting input debounce times, testing pulses, and logic linking. The module supports both OSSD (Output Signal Switching Device) compatibility and standard mechanical contact inputs. Its screw-type terminal blocks are removable and labeled according to EN 60204-1.

Key Features

• 8 safe digital inputs (two groups of four channels)

• Dual-channel evaluation with cross-circuit detection

• SIL CL 3, PL e, Cat. 4 capability

• Short-circuit and cross-fault monitoring per input

• Configurable input filtering and test pulse generation

• LED indicators for channel and status display

• Backplane connection to PNOZsigma base modules

• Removable terminal blocks for easy wiring

Application Scenarios

The Pilz 773600 is commonly employed in machine building, conveyor systems, robotic cells, and packaging machinery where functional safety is mandatory. It directly connects to safety-rated sensors such as magnetic switches, mechanical interlocks, non-contact safety switches, and light grids. The module can also be used for monitoring safety mats and enabling switches. Its fast response time (≤ 20 ms) ensures timely reaction to stop commands.

Integration with PNOZsigma System

The 773600 is part of the modular PNOZsigma safety system, which includes configurable controllers (e.g., PNOZ m B0, m B1), relay outputs, and expansion modules. Up to 8 modules can be connected to a single base unit, creating a scalable safety I/O network. The configuration software allows drag-and-drop assignment of inputs to safety functions, including emergency stop monitoring, guard locking, and muting functions for light curtains.

Compliance and Environmental

This input module complies with EN 61000-6-2 (industrial immunity) and EN 61000-6-4 (emissions). It is certified by TÜV, UL, and CSA for global markets. Operating temperature range: -10°C to +55°C. The housing is rated IP20 for control cabinet installation. The unit measures 96mm x 22.5mm x 112mm (H x W x D), requiring minimal panel space.

Installation and Maintenance

Installation follows standard DIN rail mounting (EN 60715). The module must be placed adjacent to a PNOZsigma base unit with bus connector. All safety inputs must be wired using shielded cables where required. Periodic proof testing is not mandatory because the module’s self-diagnostic architecture achieves a high diagnostic coverage. However, functional testing of connected safety devices is recommended every 12 months.

Conclusion

The Pilz 773600 input module offers robust and flexible safety signal acquisition for complex machinery. Its dual-channel evaluation, extensive diagnostic capabilities, and seamless integration with the PNOZsigma family make it a preferred component for safety system engineers. Whether upgrading existing installations or designing new safety loops, this module ensures reliable operation up to the highest safety integrity levels.