Bringing a radio remote control to market for a European overhead crane means satisfying a layered regime: the crane-specific control standards, the electrical-equipment standard for hoisting machinery, a functional-safety standard for the protective functions, the radio and EMC rules for the wireless link, and the battery performance, safety and transport evidence for the transmitter pack. This final paper maps that complete campaign for a nickel-metal hydride powered remote: EN 13557 for controls and control stations with its cableless-control annex, EN/IEC 60204-32 for the electrical equipment of hoisting machines, EN ISO 13849-1 for the Performance Level d, Category 3 architecture, IEC 60947-5-5 and EN ISO 13850 for the emergency-stop device, the Radio Equipment Directive 2014/53/EU with its harmonised standards, and IEC 61951-2, IEC 62133-2 and UN 38.3 for the NiMH cells. It shows how the battery evidence integrates with the system-level safety case and what a supplier must provide to keep certification coherent.
EN 13557 specifies health-and-safety design requirements for the controls and control stations of all crane types, with an annex dedicated to cableless - radio - control systems that cross-references the electrical requirements of EN/IEC 60204-32. It addresses the arrangement and type of control devices, the prevention of unintended commands, marking and the specific behaviours expected when control is wireless, including how the system reacts when the control link is interrupted.
For the transmitter and its battery, the standard's cableless provisions translate into demonstrable behaviours: commands must not persist when the operator releases a control, motion must stop safely on signal loss, and re-establishing the link must not cause unexpected motion. Proving these across battery state-of-charge and temperature - including the stop-on-link-loss behaviour when the pack is near depletion - is a direct part of type testing, and it validates the reserve and monitoring design of the NiMH pack.
EN/IEC 60204-32 applies the electrical-equipment safety principles of the machinery family specifically to hoisting machines - cranes, winches, storage-and-retrieval machines and related equipment - from the supply connection point through controlgear, conductors and control stations. It sets requirements for protective measures, control circuits and control functions, and it is the electrical backbone to which the remote transmitter and receiver must conform when installed on a crane.
The transmitter battery sits at the portable end of that electrical architecture, and its conformity evidence supports the system: insulation and protection against electrical fault, predictable behaviour under supply variation, and safe connection and disconnection. Demonstrating that the control function behaves correctly as the NiMH voltage traverses its discharge plateau and approaches its end - without spurious commands or loss of the stop function - satisfies the supply-variation concerns of the standard.
The protective functions - emergency stop, stop-on-link-loss, unintended-motion prevention - are designed to a required Performance Level derived from risk assessment, which for serious crane remotes is typically PL d, Category 3 under EN ISO 13849-1. Compliance is demonstrated not by a label but by a safety architecture with redundant channels, cross-monitoring and diagnostic coverage, plus quantified reliability inputs - mean time to dangerous failure of components, diagnostic coverage and common-cause-failure measures - documented in a safety assessment report.
The battery enters this quantitative case as a component whose failure modes must be understood and controlled. A pack with predictable depletion, graded monitoring and a walled-off E-stop reserve supports the claim that a battery fault is detected and handled safely; an unmonitored pack with abrupt cut-off would undermine the Category 3 architecture. The supplier's reliability and characteristic data for the high-rate NiMH cells therefore feed directly into the PL d calculation and validation, which is why battery selection is a functional-safety decision, not merely a purchasing one.
The mushroom-head emergency-stop actuator must comply with EN ISO 13850 for its red-on-yellow ergonomics and with IEC 60947-5-5 for its positive-opening, mechanically latching contact behaviour; a software-only stop is explicitly insufficient. In a radio system the E-stop command travels over the wireless link, and the design must guarantee that command is transmitted and acted upon even under adverse power conditions.
This is the standard that makes the E-stop energy reserve a testable requirement rather than a design aspiration. Type testing triggers the stop at full pack, at end-of-shift depletion and after cold soak, confirming the stop telegram is always sent and the crane reaches its safe stop state, and that the latching reset behaviour is correct. The NiMH pack's low impedance and reserved energy are what let the remote pass these tests at the worst-case condition, closing the loop to the battery design.
The wireless link is certified under the Radio Equipment Directive 2014/53/EU, using harmonised standards such as EN 300 220 for short-range devices in the licence-exempt bands and EN 301 489 for radio EMC, together with the effective-use-of-spectrum and receiver requirements. Industrial remotes must coexist with other plant radio equipment, reject interference and maintain the deterministic link latency that stop-on-signal-loss relies upon.
Radio certification and battery design intersect at the transmit pulse: the pack must hold the rail through maximum-power transmission at minimum state of charge and low temperature or the radio fails its range and latency tests. Proving clean, in-spec transmission across the NiMH discharge curve - rather than only on a fresh pack - prevents a late radio-conformance failure and demonstrates that the safety-related link is robust across the whole battery life.
The NiMH cells carry their own evidence: IEC 61951-2 for standardised capacity, charge retention and endurance, extended with high-rate discharge and internal-resistance data and wide-temperature characteristics relevant to industrial duty; and IEC 62133-2 for cell and pack safety under controlled charge, forced discharge, short circuit, vibration, shock, free fall, thermal abuse, crush and pack-level protection faults. UN 38.3 supplies the transport test summary, with NiMH's non-lithium classification again simplifying shipping of spare packs and docks to industrial customers worldwide.
The complete technical file weaves EN 13557 and EN/IEC 60204-32, the EN ISO 13849-1 PL d safety assessment, the IEC 60947-5-5 and EN ISO 13850 E-stop evidence, the RED radio certificate, and the IEC/UN battery documents into one coherent, lot-traceable package. A battery manufacturer supplying matched high-rate cells, the three battery-standard evidence sets and engineering support for the worst-case pulse and cold tests removes the most variable component from that file. With that backbone, the crane-control OEM can certify a remote whose protective functions are genuinely dependable - confident that the NiMH pack behind the operator's red button will protect the load, the machine and the workforce for every shift of its service life.
Weijiang Power designs and manufactures sealed nickel-metal hydride cells and matched industrial packs for remote, off-grid and safety-related equipment, and supports OEM partners with IEC 61951-2 performance files, IEC 62133-2 safety evidence, pulse-load characterisation, wide-temperature testing and charger/pack co-validation. Tell us your duty cycle, peak current, temperature envelope, autonomy target and the standards your product must meet, and our engineers will specify a cell-and-pack combination that protects runtime, reliability and service life. Review the range on the products page.
