When specifying or upgrading the controls for an overhead crane, workstation crane or hoist, one of the most important decisions you will make is how the operator interacts with the equipment.
The two most widely used options are pendant control stations and radio remote control and the choice between them has a direct impact on operator safety, productivity and the long-term maintenance requirements of the system.
This guide from our team here at Metreel explains how each control type works, where each performs best and the key factors to consider when making your decision.
What Is A Pendant Control Station?
A pendant control station is a hardwired control unit suspended from the crane or hoist by a cable. The operator holds the pendant and uses pushbuttons to control crane travel, hoist up and down, speed and other functions. The cable runs back to the crane’s electrical panel, carrying both the control signals and, in some configurations, providing the mechanical support for the pendant itself.
Pendant stations are available in a wide range of configurations, from simple two-button units for basic up/down hoist control to 20-actuator stations for complex multi-axis operations. Metreel’s SPA pendant control station, for example, accommodates up to 20 actuators arranged on a double row, with options for one or two speed switches, selector switches, key-selector switches and pilot lights. The modular enclosure design keeps the unit compact even with a high actuator count.
What Is A Radio Remote Control?
A radio remote control replaces the hardwired cable with a wireless transmitter and receiver operating on a dedicated radio frequency. The operator carries a handheld transmitter (typically a compact, ruggedised unit) and sends signals to a receiver mounted on the crane or within the electrical panel. The receiver interprets the signals and triggers the same crane functions as a pendant would.
Metreel’s radio remote range operates on UHF frequencies (433-870 MHz) with a response time of 50 ms and an emergency stop response time of 50 ms, meeting Category 3 PL-D stop control classification. The transmitter casing is rated IP65 and tested to operate between -20°C and +70°C, which is the same temperature range as the harshest industrial environments. The handheld unit is designed with large pushbuttons (21mm diameter) suitable for use with safety gloves and the nylon casing offers resistance to acids, oils and chemical agents.
Pendant Control: Advantages And Limitations
Pendant controls are the default choice for many standard crane and hoist applications and for good reason.
The principal advantage is simplicity. A pendant is a closed, hardwired system with no radio frequency management, no battery charging requirements and no pairing or programming to maintain. If the cable is intact and the electrical panel is functioning, the pendant works. That reliability is valued in high-throughput environments where crane downtime has a direct cost impact.
Pendants also offer a tactile, physical connection between the operator and the load. For operators handling precise or delicate lifts, being physically attached to the crane via the pendant cable can reinforce awareness of crane position, though it equally constrains movement.
The main limitations of pendant controls relate to that same cable. In applications where the crane travels over a large area, the pendant cable must be long enough to give the operator sufficient reach, which introduces cable management requirements, typically addressed using a festoon cable system or a reeling drum to take up slack and prevent the cable from trailing on the floor. Cable wear is also a maintenance consideration: in high-cycle environments, pendant cables and strain relief points are subject to fatigue over time.
A more significant limitation arises where the operator needs to be positioned away from directly beneath the load. For example, when loading a vehicle, positioning materials in a restricted space, or where the area under the crane is hazardous. In these situations, a pendant forces the operator into a position that may not be optimal for load visibility or personal safety.
Radio Remote Control: Advantages And Limitations
Radio remote controls remove the physical tether between operator and crane, which fundamentally changes how the crane can be used.
The most immediate benefit is operator positioning. With a radio remote, the operator can stand wherever they have the best view of the load and the landing zone, not just wherever the pendant cable reaches. This is particularly valuable when handling long or awkward loads, working in congested bays, or landing loads onto vehicles or into racking systems where close observation is critical.
Freedom of movement also has a direct safety benefit. In environments where the crane moves across a wide area, an operator using a pendant must track the crane’s travel to keep the cable from trailing or snagging. A radio remote eliminates that constraint entirely, reducing trip hazards and allowing the operator to maintain a safe distance from the load and the hook zone.
For applications involving overhead cranes spanning wide bays, monorails running long distances, or gantry cranes operating in outdoor or semi-enclosed environments, radio remotes are often the more practical solution. They also simplify the crane’s mechanical design by removing the need to route and manage a long pendant cable.
The considerations with radio remotes centre on battery management, system pairing and the additional electronics in the receiver unit. Transmitter batteries require monitoring and charging. Metreel’s radio remote transmitter provides over 1,200 hours of operating life, with an emergency backup kit using standard AA batteries available as a failsafe. The receiver adds a component to the electrical panel that requires periodic inspection and the system should be checked for reliable signal transmission as part of routine crane maintenance.
For environments where radio frequency interference could be a concern (i.e. certain manufacturing or processing environments with dense electrical equipment), frequency selection and antenna placement should be part of the installation design. Metreel’s radio remote range includes directional and high-gain antenna options to address specific installation requirements.
Explosion-Proof Environments
For cranes operating in potentially explosive atmospheres (i.e. chemical processing, petrochemical, grain handling or similar environments), control selection must account for ATEX zone classification. Standard pendant stations and radio remotes are not suitable for use in classified zones without appropriate certification.
Metreel’s explosion-proof pendant control system is designed specifically for hazardous area use. If radio remote operation is required in an ATEX-classified zone, the transmitter and receiver must both carry the appropriate ATEX certification for the zone category in question. This is a critical specification point, as using uncertified equipment in a hazardous area is both a regulatory breach and a serious safety risk.
If your application involves hazardous areas, this should be identified at the outset of any control specification, as it narrows the available options and affects the overall system design.
Joystick Controllers
For cranes requiring proportional speed control or simultaneous multi-axis operation, particularly overhead cranes with variable speed drives or applications demanding fine positioning, a joystick controller may be more appropriate than a standard pushbutton pendant or radio remote. Joystick controllers allow smooth, proportional inputs across multiple axes simultaneously, which is particularly useful in precision handling or when operating complex lifting rigs.
Metreel offers both the Juliet and Romeo joystick controller options within the TER electrical control range.
Key Factors To Consider When Choosing
Working through the following questions will usually identify the right control type for a given application.
Operator positioning: Does the operator need to move freely around the load, or will they remain in a fixed position relative to the crane? If the former, a radio remote is likely the better fit.
Bay size and crane travel: For long-travel cranes covering large areas, radio remotes remove the cable management burden entirely. For short-travel hoists or workstation cranes in compact cells, a pendant is often simpler and more cost-effective.
Hazardous environments: Is the crane operating in an ATEX-classified zone? If so, control selection must be driven by zone certification requirements before any other consideration.
Cycle rate and reliability requirements: In very high-cycle applications, both pendant cables and radio transmitter batteries require a maintenance plan. Neither is inherently more reliable than the other, but the failure modes differ.
Operator preference and training: In some facilities, operators have a strong preference for one control type based on familiarity. For new installations, training requirements are broadly similar, but for retrofit projects, operator feedback is worth gathering before specifying.
Need Tailored Advice About Pendant Or Radio Controls For Your Crane?
Pendant controls remain the right choice for many standard hoist and short-travel crane applications where simplicity, low maintenance and a familiar operator interface are the priority.
However, radio remotes offer clear advantages wherever operator positioning, load visibility or freedom of movement is a limiting factor.
Many facilities operate a mix of both, comprising pendant-controlled hoists at individual workstations and radio-remote-controlled overhead cranes for bay-wide material movement.
The electrical control range from Metreel covers both, along with joystick controllers, limit switches and foot switches, allowing the control system to be specified as a coherent package alongside the crane itself.
If you are specifying controls for a new installation or considering upgrading an existing system, get in touch with the Metreel team for advice on the right solution for your application.