Wireless crane remote control | 4 buttons + START/STOP | 1 speed | 868 MHz | 12–440 V AC/DC | IP65 | ES-F21-4SE

ES-F21-4SE wireless 4-button crane remote – 868 MHz, 12–440 V AC/DC

ES-F21-4SE 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
• 868 MHz radio – EU SRD band for short-range control
• 12–440 V AC/DC receiver – fits both 12/24 V DC and 230/400 V AC control circuits
• Up to ~250 m – the operator picks a safe position in open space
• IP65 receiver – suitable for dusty and damp locations

• ES-F21-4S+ – extra twist-release mushroom STOP on the transmitter, receiver 24–440 V AC/DC
• ES-F21-2SE – 2 direction buttons, up to ~150 m
• ES-F21-E1B(H) – 6 direction buttons, receiver 24–440 V AC/DC, up to ~150 m
• ES-ML-K4 – 4 direction buttons, receiver 230 V AC, IP66

• 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
• Vehicle-mounted winches and lifts with 12/24 V DC control

• Receiver relays switch contactor coils only – do not connect the motor directly to the receiver.
• The receiver supply version (within 12–440 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).

Quick selection guide

Check before ordering:

• When ordering, state the contactor coil voltage – the receiver version is chosen within 12–440 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-F21-4SE: 4 buttons, 868 MHz

ES-F21-4SE is a 1-speed radio remote for hoist and trolley (or bridge) with a 12–440 V AC/DC receiver and a range of up to ~250 m in open space. The receiver also suits 12/24 V DC control circuits.