Wireless crane remote control | 4 buttons + START/STOP + mushroom STOP | 1 speed | 868 MHz | 24–440 V AC/DC | ES-F21-4S+

ES-F21-4S+ wireless 4-button crane remote with mushroom STOP – 868 MHz, 24–440 V AC/DC

ES-F21-4S+ is a radio control set (transmitter + receiver) for hoists and cranes that need lifting plus one horizontal axis – trolley or bridge. When a button is pressed, the transmitter sends the command over 868 MHz, a receiver relay energises the corresponding contactor coil, and the contactor switches the motor.

• 4 direction buttons – lifting plus one horizontal axis – trolley or bridge
• START and STOP – switch the main contactor KM0 on and off
• Twist-release mushroom STOP – separate emergency stop on top of the transmitter, easy to press with gloves
• 868 MHz radio – EU SRD band for short-range control
• 24–440 V AC/DC receiver – version to match the contactor coil voltage
• Up to ~250 m – the operator picks a safe position in open space

• ES-F21-4SE – no twist-release mushroom STOP on the transmitter, receiver 12–440 V AC/DC, IP65
• ES-F21-2S+ – 2 direction buttons, also with mushroom STOP on the transmitter, up to ~150 m
• ES-F21-E1B(H) – 6 direction buttons, no twist-release mushroom STOP on the transmitter
• ES-21-4D – 4 direction buttons, 2 speeds (two-step buttons)

• Hoists with an electric trolley
• Suspended and jib cranes
• Winches with two motions
• Replacing a 4-button pendant with a radio remote
• Lifting equipment in warehouses and production halls

• Receiver relays switch contactor coils only – do not connect the motor directly to the receiver.
• The receiver supply version (within 24–440 V AC/DC) must match the control circuit voltage.
• The STOP / MAIN output drops out the main contactor KM0; on loss of radio link the crane must stop (EN 60204-32) – verify at commissioning.
• 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 the main isolator and lock it out (LOTO).
• The mushroom STOP is released by twisting – find the cause of the stop first, only then reset it and press START.

Quick selection guide

Check before ordering:

• When ordering, state the contactor coil voltage – the receiver version is chosen within 24–440 V AC/DC.
• 868 MHz is an EU SRD band; if the remote will be used outside the EU, check that the frequency is permitted in your country.
• Count the motions you need: 4 buttons = 2 motions, 1 speed; for more directions or 2 speeds choose another model from the group.

ES-F21-4S+: 4 buttons + mushroom STOP, 868 MHz

ES-F21-4S+ is a 1-speed radio remote for hoist and trolley (or bridge) with a 24–440 V AC/DC receiver and a range of up to ~250 m in open space. The twist-release mushroom STOP on the transmitter is a separate emergency stop control.