Universal Remote Control F21-4D
The F21-4D is a single or double speed radio remote control for cranes, hoists and mobile equipment, supplied as a matched transmitter and receiver pair. Four function buttons provide up to seven control points with programmable f
What The Universal Remote Control F21-4D Is For
The F21-4D is a single or double speed radio remote control for cranes, hoists and mobile equipment, supplied as a matched transmitter and receiver pair. Four function buttons provide up to seven control points with programmable functions, allowing customisation of motion and start modes. Control range is up to 100 metres and both units are rated IP65, which ensures reliable operation in dusty, wet or outdoor environments. Receiver voltage is built to order from AC380V down to AC/DC12V, so the set can be installed directly onto an existing control panel without a transformer.
What You Get From This Unit
- Programmable button functions allow custom motion mapping to match the machine’s actual control sequence
- IP65 protection on both transmitter and receiver enables use in outdoor yards, wash-down areas and dusty workshops
- Control range up to 100 metres allows the operator to stand clear of the machine while maintaining full control
- Receiver voltage built to order avoids the need for an external control transformer on the panel
- Over 4.3 billion unique ID codes prevent interference between adjacent machines on the same site
Where This Model Is Used
- Overhead and bridge cranes where the cab view of the hook is blocked by structure or load
- Mobile hoists and winches used in construction or mining where a trailing pendant cable is impractical
- Retrofit of an existing crane or hoist with a pendant control system to a wireless remote
- Equipment in wash-down bays or outdoor gantries exposed to rain, dust and high humidity
- Maintenance teams replacing a failed or damaged pendant station with a direct drop-in wireless alternative
Buyers This Model Suits
- Crane and hoist OEMs integrating a remote control into a new machine build
- Equipment dealers stocking a control unit that supports multiple voltages and configurations
- Maintenance contractors replacing a lost or damaged transmitter without changing the receiver
- Traders sourcing a radio control set from China with low MOQ and fast delivery
What Goes Wrong Without It
- Operator must walk with the load while holding a pendant cable that snags on structure or gets caught in machinery
- Existing control panel runs AC110V and a standard 24V receiver would require an extra transformer
- A single button on a pendant fails repeatedly due to wear or water ingress in a wet environment
- Two cranes in the same bay respond to the same transmitter due to shared frequency or code
- A control system lacks flexibility in motion mapping, requiring custom wiring or relays
How The Unit Is Built
- 4 double speed function buttons, 1 emergency stop, 1 on/off switch, 1 start button
- Up to 7 control points with functions programmable via computer software
- Motion directions (UP/DOWN, EAST/WEST) can be assigned to any button
- Start button can be set to start, normal, or toggle mode for different control logic
- Transmitter LED flashes slowly when batteries are low; flashes rapidly if the transmitter is not started correctly or a button is jammed
- Glass fibre-reinforced nylon housing on both transmitter and receiver for durability on a shop floor
Data From The Original Product Sheet
| Model | F21-4D |
|---|---|
| Configuration | 1 transmitter with 1 receiver |
| Speed | Single or double speed |
| Function buttons | 4 |
| Control points | Up to 7 |
| Control distance | Up to 100 m |
| Operating frequency | 310.0325-331.165 MHz |
| Channels | 80 |
| Channel spacing | 0.2675 MHz |
| Unique ID codes | Over 4.3 billion |
| Enclosure protection | IP65 |
| Working temperature | -35 C to +85 C |
| Transmitter size | 156 x 56 x 49 mm |
| Transmitter weight | 208 g |
| Transmitter voltage | DC3V (2 x AA batteries) |
| Receiver size | 187 x 86 x 79 mm |
| Receiver weight | 604 g |
| Receiver power | AC380V, AC220V, AC110V, AC48V, AC36V, AC24V, AC12V or AC/DC12V |
| Output capacity | 6 relays, 5 A omniseal relays |
| Housing material | Glass fibre-reinforced nylon-6 |
| Colour | Orange |
| Warranty | 1 year |
What The Housing And Contacts Are Made Of
- Glass fibre-reinforced nylon-6 housing on both transmitter and receiver for impact resistance and durability
- Omniseal relays rated 5 A at AC250V, with 10 A fuse for protection against overcurrent
How This Unit Is Made
Step 1
Boards are populated on the SMT line and soldered on the automatic wave soldering machine
Step 2
Transmitter and receiver are paired to a unique ID code and channel before assembly
Step 3
Each set is function tested against the ordered receiver voltage before packing
Step 4
Button functions are programmed via computer software before final assembly
Step 5
S/N and channel are printed on the back of both units so a replacement can be matched later
What Is Checked Before It Ships
- Raw material through finished product is inspected step by step on the production line
- Working process follows ISO9001:2008
- Every set is powered up and each motion is checked before it leaves the line
- 12 month warranty from delivery
What Can Be Changed On Your Order
- Button functions programmed via computer software to match machine control logic
- Start button mode set to start, normal, or toggle as required
- Button markings can be changed to custom labels or your own brand text on OEM orders
- Two transmitters can be paired to one receiver, or a spare transmitter added to the set
How It Compares With The Alternatives
| Wired pendant control station | Radio removes the trailing cable but adds batteries to change and a receiver to wire in; a pendant is cheaper and never needs pairing |
|---|---|
| F21-6D with six buttons | The 4D is sufficient for machines with fewer motions; if more control points are needed, the 6D offers more buttons |
| Fixed-function remote controls | Programmable functions allow exact matching to the machine’s control sequence; fixed remotes require rewiring or relays to change logic |
Getting It Onto The Machine
- Confirm the control voltage on the existing crane panel before ordering the receiver
- Count the motions the machine actually needs and choose the button count with one spare
- Mount the receiver inside the panel with the 1 m cable running to the contactor terminals
- Watch the transmitter LED: slow flashing means change the two batteries
- Record the S/N and channel from the back of both units so a lost transmitter can be replaced without changing the receiver
- Use computer software to program button functions to match the machine’s control logic
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Replace A Lost Or Broken Transmitter
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Catalogue And Datasheets
Download center
Frequently Asked Questions
What is the minimum order quantity?
One set. A single sample is available so you can test it on the machine before committing to volume.
How long is delivery?
Around 2-4 days for a sample order and about 7 days for a small volume order, then 3-8 days by FedEx or DHL.
Which receiver voltage should I order?
Match the control voltage on the crane panel. The receiver is built for AC380V, 220V, 110V, 48V, 36V, 24V or AC/DC12V, so tell us the panel voltage with the order.
Can I get a replacement transmitter only?
Yes. Send the S/N and CH printed on the back of your receiver and we build a new transmitter on the same channel, so the receiver stays in place.
Will two cranes in the same bay interfere?
Each set is coded with one of over 4.3 billion unique ID codes and runs on 80 channels, so a transmitter only answers its own paired receiver.
Can the button functions be changed?
Yes. Use computer software to reprogram the button functions to match your machine’s control logic.
How is it packed?
One set per box at 18.7 x 8.6 x 7.9 cm, six sets per carton at 76.3 x 49.3 x 33 cm.
Quote The Universal Remote Control F21-4D
Send the control voltage on your panel and the motion list. A price, a lead time and the matching receiver build come back the same working day.