3D rendered model of a yellow and black tower crane on a plain white background with a cast shadow

F21-2S Up and Down Remote Control For Chain Hoists

Client Background

Who The Buyer Is

A crane and hoist OEM in Germany who manufactures electric chain hoists for industrial lifting applications. They needed a reliable wireless replacement for their existing wired pendant controls, specifically for hoists rated at 500kg to 7500kg, with a focus on durability and ease of use in dusty and wet workshop environments.

Project Challenge

What Had To Be Solved

The OEM required a wireless remote control that could replace the standard wired pendant on chain hoists across multiple load capacities, maintain consistent operation in harsh conditions, and be compatible with existing receiver units without reprogramming. They also needed a solution that could be supplied in small batches for testing and pilot production.

Customer Pain Points

What Was Failing Before

Wired pendants were prone to cable damage in high-use industrial settings
Existing wired controls did not meet IP65 protection standards for dust and water resistance
Different hoist models used different control layouts, making standardisation difficult
Need for a single remote that worked across 500kg to 7500kg hoist capacities
Requirement for a low voltage warning indicator to prevent operation during battery failure

Our Solution

What Was Supplied

The F21-2S single speed wireless remote control was selected, featuring IP65 waterproof and dust-proof housing, two function buttons (Up and Down), and a low voltage warning LED. It was paired with a compatible receiver for 24V DC operation and tested across 500kg, 1000kg, 2000kg, 5000kg, and 7500kg hoist models. The remote was used to replace wired pendants on production units and in test builds.

Photos

Units And Application

Orange industrial wireless remote control pendant with start, up, and down buttons and a receiver box

Orange industrial radio remote control with STOP, START, UP, DOWN, LEFT and RIGHT buttons and a black antenna

Manufacturing Process

How The Units Were Built

Step 1

Transmitter housing assembled with IP65 rated seals and gaskets

Step 2

PCB populated on in-house SMT line and wave soldered

Step 3

Two AA batteries installed with low voltage warning LED circuit tested

Step 4

Remote paired to a unique receiver ID and channel during final testing

Step 5

Function tested under 24V DC load simulation to match hoist control requirements

Supply Chain

How It Was Shipped And Repeated

The F21-2S units were shipped as a sample batch of 5 sets via DHL, delivered within 3 days. Subsequent small volume orders of 10 to 20 units were fulfilled within 7 days. All shipments included tracking numbers issued immediately by FedEx and DHL.

Quality Control

What Was Checked

Each remote powered on with 24V DC and tested for up/down function
Low voltage warning LED verified to activate at correct battery threshold
IP65 seal integrity checked with visual and pressure test
S/N and channel recorded for traceability to match field receivers
Final inspection performed before packing and shipping

Final Result

What Happened

The F21-2S remote control was successfully integrated into the OEM’s production line for chain hoists across multiple load capacities. The wireless solution reduced cable failures and improved operator safety and convenience. The buyer placed repeat orders and began using the remote on new export models.

Customer Benefit

What The Buyer Got Out Of It

A durable, IP65-rated wireless remote replaces wired pendants on 500kg to 7500kg chain hoists, operates reliably in harsh environments, provides low battery warning, and arrives in days with full traceability for spares.