Gigasense 9:302C is a reliable electronic unit for crane overload protection. It monitors load via a force transmitter with 0–2 mV/V or 4–20 mA output and includes three configurable load limits for safe crane operation.
To meet European safety requirements, the 9:302C can be used with a redundant load sensor. With redundant sensors, the system meets Performance Level C, Category 2 according to SS-EN ISO 13849-1.
The system can also operate with a single-channel sensor where regulations permit, but Gigasense strongly recommends redundant sensors for maximum safety and reliability.
The 9:302C features two relay outputs for load monitoring and crane safety.
Relay 1 is typically used for warning at approximately 110% of rated load, or for slack rope detection.
Relay 2 is used for overload protection and is typically activated at 120–125% of the crane’s rated load capacity.
Relay 2 includes two configurable limits:
Limit 2A – adjustable with delay
Limit 2B – immediate stop without delay
Limit 2B is commonly used as an emergency overload limit, immediately stopping all crane movements.
The 9:302C includes an OTE relay (Output Test Equipment) connected to the crane control system.
In case of a system fault, the relay automatically stops the crane and alerts the operator. The cause of the fault must be investigated and resolved before operation can resume.
An analog 4–20 mA output allows integration with external systems, such as:
crane control systems
supervisory control systems
large external load displays from Gigasense
This enables real-time load monitoring and display.
The system features a backlit LCD display with two rows and 16 alphanumeric characters per row. The display provides clear information about load and system status and is easy to read in industrial environments.
The 9:302C is designed for quick installation and easy setup.
Configuration via four front-panel buttons
No laptop or special software required
Settings can be adjusted directly on the unit
Systems are normally preconfigured at the factory, simplifying installation.
The 9:302C is a self-monitoring overload protection system. Faults in the load sensor or cabling are automatically detected and indicated as overload conditions, ensuring that operators are immediately alerted to any malfunction.
