Wireless crane remote control | 2 buttons + START/STOP | 1 speed | 868 MHz | 12–440 V AC/DC | 10 A relays | IP65 | ES-21-2S

Wireless crane remote ES-21-2S – 2 buttons, START/STOP, 868 MHz, 12–440 V AC/DC receiver

ES-21-2S is a compact single-speed radio remote with 2 direction buttons (up / down), START and STOP. The transmitter sends the command over 868 MHz to the receiver, whose relays switch the contactor coils – the motor is always switched by a contactor. Suitable for hoists, crane beams, winches and lifts.

• 2 direction buttons – up / down, single speed
• START – the system is enabled only by a deliberate action
• STOP – de-energises the main contactor
• 868 MHz radio – EU SRD band, up to ~150 m in open space
• 12–440 V AC/DC receiver – connects to a control circuit of the same voltage
• 10 A relays – ample margin for contactor coil currents
• IP65 – protection against dust and water jets

• ES-21-4S – 4 buttons, single speed – when both hoisting and travel are needed
• ES-21-4D – 4 two-step buttons, 2 speeds – for two-speed hoists
• ES-F21-2S+ – 2 buttons + twist-release mushroom emergency STOP on the transmitter, 24–440 V AC/DC receiver
• EL-F21-2S-TX – 2 buttons + START, up to ~100 m, 24–440 V AC/DC receiver

• Electric hoists and crane beams
• Single-speed overhead and gantry cranes
• Electric winches
• Lifts and lifting platforms
• Workshops, production halls and warehouses
• Lifting equipment on construction sites

• The receiver relays switch contactor coils only – motor current must never flow through them.
• The receiver supply voltage must match the control circuit and contactor coil voltage.
• The STOP / MAIN relay de-energises the main contactor KM0; during commissioning check that the crane stops when the transmitter is switched off or the link is lost (EN 60204-32).
• Limit switches (SQ) and NC interlocking of opposite directions stay in the circuit – the radio remote does not replace them.
• Before installation or repair, switch off and lock the main isolator (LOTO).

Quick selection guide

Check before ordering:

• When ordering, state the control circuit voltage – the receiver version is selected from the 12–440 V AC/DC range and must match the contactor coil voltage.
• 868 MHz is an EU SRD band; if used outside the EU, check that the frequency is permitted there.
• 2 buttons control one motion (up / down) – for travel as well you need a 4- or 6-button remote.

Who is ES-21-2S for?

ES-21-2S is a 2-button single-speed radio remote with an 868 MHz link and a 12–440 V AC/DC receiver. Choose it when an existing contactor circuit needs simple wireless control instead of a pendant.